Janos's questions

xubuntu 20.04 command efibootmgr -v has three columns after the BootOrder: line. The third column has either a boot loader entry or "RC" for CD or USB media. My HP laptop has W10 preinstalled with a recovery partition for W10, and of course I have Linux installed on another partition. The third column starts with "HD(foo)" for the W10 boot or Ubuntu boot, and it starts with "BBS HD(foo)" for the W10 recovery partition.

I searched the Internet, perused the 2700+ pages of the UEFI Spec and found that BBS may mean BIOS Boot Specification. But could not find out anything about the "RC" entry in the third column.

Just curious.

Actual output of the command as requested by a comment below

BootCurrent: 0001
Timeout: 5 seconds
BootOrder: 2002,2001,0001,0000,0008,2004
Boot0000* Windows Boot Manager  HD(1,GPT,222a7e4f-cb9d-449e-b222-86fbc93595d8,0x800,0x82000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...5................
Boot0001* ubuntu    HD(1,GPT,222a7e4f-cb9d-449e-b222-86fbc93595d8,0x800,0x82000)/File(\EFI\ubuntu\shimx64.efi)
Boot0005* Internal Hard Disk or Solid State Disk    RC
Boot0007* Internal Hard Disk or Solid State Disk    RC
Boot0008* Notebook Hard Drive - ST1000LM035-1RK172  BBS(HD,Notebook Hard Drive - ST1000LM035-1RK172,0x500)................-...........A....................................X..|.......A.........................
Boot2001* EFI USB Device    RC
Boot2002* EFI DVD/CDROM RC
Boot3001* Internal Hard Disk or Solid State Disk    RC

This is an hp-15bs062st laptop, W10 preinstalled then messed up and reinstalled from hp-Microsoft OS stick.

Boot 0001 is my Ubuntu

Boot 0005, 0007 and 3001 are hard disk partitions used for linux swap and other mounted files

Boot 0000 and 0008 are Windows OS and Recovery

I don't know and don't really care what 2004 is in the boot order

Boot order is fine as is: machine boots into my Ubuntu, but if I have a bootable USB or CD it boots that not Ubuntu.

If I need W10 I can chose it at boot.

Everything makes sense except RC and why the Windows recovery is marked with BBS - but that's OK. My question was about the RC.

I'm trying to share files on home network between two linux machines: host-A is Ubuntu 20.04, host-B is Red Hat. Samba worked well until distr. upgrade to 20.04. Now cifs mount from host-B reports "No route to host". Typical and obvious remedies don't work. sudo ufw status shows a bunch of ports allowed. I can ping host-A or ping ip of host-A, but cannot connect with gigolo or other smb protocol. Then I tried to set up nfs - same problem. Testing connection from host-B:

nmap host-A

returns 22 tcp open ssh but when I do

ssh host-A:22

I get " Could not resolve host... Name or service not known" Same with ip address instead of host name.

I know smb or nfs does not use port 22, the above is only to demonstrate that something in firewall is not working the way I understand it should.

I've searched answers but so far this remains a conundrum for me. I must be doing something wrong or missing something. To me it looks like my Ubuntu 20,04 (host-A) can only react to ping in my home network (wireless, 192.168.0.0).

CORRECTION: my test with ssh was incorrectly described. The correct command was ssh host-A, and host-A did in fact recognize the connection attempt, registered host-B. Then ssh user@host-A did connect after entering user password. Then I had terminal access to host-A on the host-B machine. Nevertheless, neither samba nor nfs file sharing succeeded despite having ports allowed in ufw. Same error as in my original posting.

ADDITIONAL info based on Answer 1: Outputs of host command on local network targeting Host-B

user@Host-A:~/Desktop$ host Host-B
Host Host-B not found: 2(SERVFAIL)
user@Host-A:~/Desktop$ host 192.168.nnn.mmm
mmm.nnn.168.192.in-addr.arpa domain name pointer Host-B.
user@Host-A:~/Desktop$

If I do vpn on Host-B where it is on mydomain.com

user@Host-A:~/Desktop$ host Host-B.mydomain.com
Host-B.mydomain.com has address xxx.pub.lic.ip
user@Host-A:~/Desktop$ 

Samba related command outputs:

user@Host-A:~/Desktop$ sudo smbstatus
[sudo] password for user: 

Samba version 4.11.6-Ubuntu
PID     Username     Group        Machine                                   Protocol Version  Encryption           Signing              
 ----------------------------------------------------------------------------------------------------------------------------------------

Service      pid     Machine       Connected at                     Encryption   Signing     
---------------------------------------------------------------------------------------------

No locked files

user@Host-A:~/Desktop$ findsmb

                            *=DMB
                            +=LMB
IP ADDR         NETBIOS NAME     WORKGROUP/OS/VERSION 
---------------------------------------------------------------------
user@Host-A:~/Desktop$ smbtree
user@Host-A:~/Desktop$ 

Same in Host-B [userB@Host-B Desktop]$ smbstatus

Samba version 3.6.23-53.el6_10
PID     Username      Group         Machine                        
-------------------------------------------------------------------

Service      pid     machine       Connected at
-------------------------------------------------------

No locked files

[userB@Host-B Desktop]$ findsmb

                                *=DMB
                                +=LMB
IP ADDR         NETBIOS NAME     WORKGROUP/OS/VERSION 
---------------------------------------------------------------------
192.168.nnn.mmm   CENTOS         [AB] [Unix] [Samba 3.6.23-53.el6_10]
[userB@Host-B Desktop]$ smbtree
Enter userB's password: 
[userB@Host-B Desktop]$

More info: Apparently Host-B finds itself in samba and Host-A does not. However, in Host-A (the Ubuntu machine) Browse Network in Thunar does display the netbios name of itself, defined in smb.conf. Yet findsmb command cannot find itself.

My other desktop has linux with samba 3.x I recently upgraded my HP15 laptop from xubuntu 18.04 to 20.04 with a virgin installation. I was able to use cif mounting and file sharing back and fourth from my other linux machine running samba 3.x to my HP laptop vith xubuntu 18.04. Now the HP laptop can only find itself on samba (Thunar Browse network). Based on Internet search the only modifications I made to my smb.conf are

client lanman auth = yes
ntlm auth = yes

but there is no connection either way.

I understand that samba server is not part of the 20.04, only samba-common is included. I did sudo apt install samba but no connection is possible, just errors. Once more: connection was OK with 18.04.

Xfburn shown error message when proceeding with burn:

Write not implemented

... or something like that. How to implement it? Is this a bug?

This is a virgin install of 20.04, not upgrading from 18.04 and previous versions. I tried to add an item to Other using MenuLibre. Launcher tested OK, saved, etc., yet Whisker menu still not showing "Other" category. If I go back to MenuLibre it does not even show my addition. Yet, in my $HOME all changes and the launcher file is created. I researched the subject, consulted answer here "How to reset MenuLibre"; purged, deleted related files, reinstalled MenuLibre, but nothing helps. This really baffles me.

Further notes a few days later: After various attempts finally I have the "Other" category in Whisker menu with my custom added menu items (launchers). However, I had to do it "under the hood" and not with MenuLibre. Here is how:

1. deleted ~/.config/menus/applications-merged and ~/.config/menus/gnome-applications-merged folders
2. created my launchers (.desktop files) in ~/.local/share/applications/ with Mousepad, according to relevant specs
3. edited ~/.config/menus/xfce-applications.menu XML file with Mousepad in the <Name>Other</Name> section within <layout> part by adding there <Filename>MyOwnLauncher.desktop</Filename> lines of my own Other menu items.

This seems to work. Maybe tedious, but not as frustrating as MenuLibre. I even created a new user to see if MenuLibre would work there - but not really. Same thing, Other is not shown. The new menu item in the other category is in fact created in ~/.config/menus/applications-merged as .desktop files, but invisible to Whisker menu.

Could this be a bug in MenuLibre for the 20.04 xUbuntu version?

I have a virgin install of 20.04 (instead of upgrading from 18.04, and older versions). mysql works, but I cannot use LibreOffice Base to connect to my database in mysql. This worked well in 18.04. I searched the web, tried various apt installs, but still cannot connect. Typical errors are "...org.mariadb.jdbc:Driver..." or "...oracle.jdbc.driver.OracleDriver..." could not...

Update: I have downloaded mariadb-java-client-2.6.0.jar from https://downloads.mariadb.org/connector-java/2.6.0/ It is a deb package, so I installed it with sudo apt install ./mariadb-java-client-2.6.0.jar. At this point things were strange. First, I had to rename the installed file in /usr/share/java by stripping the "-2.6.0" from the .jar file. Then connection either succeeded or not. When it did not succeed it complained about encryption, public key, etc. However, after signing on to the same database from mysql workbench then connection from LO Base worked.

Technically the problem is solved, but I cannot post this as "Answer" because of the idiosyncrasy of on or off connection. I'm sure there is a more elegant and straightforward solution out of the box when 20.04 is installed with LibreOffice Base.

My "Settings/Preferred Application" is set to Evolution, yet when there is an email link in a web page Thunderbird is activated. I did some Internet research but could not find solution. I do not have 'Activities/Details' menu or similar. This is xubuntu 18.04 with Firefox as web browser and Evolution as email client. I abandoned Thunderbird because Lightning started to loose home calendar and I had to remove and re-install Lightning. Fortunately, my calendar entries were still there.

Recently, after booting the window appears "System Problem Detected" - and I choose "Report problem". So how can I find out what actually is the problem? Otherwise everything works as expected. Xubuntu 18.04 on HP15 laptop.

I have accidentally pressed some Alt+f.. key and now my menu window (the one that opens when I click on the top left corner) is full size. Tried various settings and I'm more confused. Originally I changed the Alt+f4 to be able to use it in dosbox lotus-123 for undo function, and it works there. I also set Shift+Alt+f4 to resize window - and it does work for any open window except for this menu window. So the short question is: how to resize the open menu window? This is Xubuntu 18.04, I think xfce something.

Trying to set desktop background to a jpg file, but when I select the folder (left click on a spot where there is no icon on the desktop > select "Desktop settings" > lower left area there is "Folder:" > and next to it drop down list > click on "Other" > opens up "Select folder" file-browser window) files are grayed out. When I click "Open" it goes back to Desktop settings window and nothing is showing in Background tab. I searched the internet, and none of the answers seem to work. I have not tried yet the command line method. This is xubuntu, 18.04, xfce.

How to autosave a backup copy of the original text file in Ubuntu 18.02 after editing and saving the modified version? Mousepad does not have a setting for it.

Hp-15 laptop (fairly recent and popular W10 model) has Realtek-8723DE WiFi adapter. The driver module is not part of any current 4-15.0 kernels of Ubuntu 18.04. Every time there is a kernel update (presently to -39) I have to recompile the module. My question is: when will be this module be part of the kernel updates?

Why mysql server or client is not in software selection. It looks like the only way to install mysql is using sudo apt install command.

My Ubuntu 16.04 has libsnappy.so.* files in /usr/lib/i386... folders.

• Do I need them?

Also, there is a /usr/lib/snapd.glib folder even after I removed snap.

• Can I just purge all remnants of snap, snapd and snappy related files with brute force?

• Is there a way to remove them intelligently without leaving residues?

I already did apt autoremove and apt autoclean yet these are still here.

Ubuntu 16.04 - has a /snap/core folder with subfolders of revisions. Do I need the /snap folder at all?

Can I just remove it (and how)?

I'm printing to Lexmark Z2420 using another linux machine because my xubuntu 16.04 laptop cannot install the printer, no driver is available. When I print from the other linux machine the print appears on paper exactly as on the screen. This is important if I print labels, etc. I have to access the Lexmar printer from my xubuntu laptop from the other linux machine if I need to print color. Lexmark is set up on my xubuntu with Generic Postscriptprinter driver (POSTSCRI.PPD). The problem is that print image on the paper is shifted by 1/4 inch to the right and up. I tried to adjust the ppd file in /etc/cups/ppd folder, but it has no effect on printer output. On the other linux machine I was able to place the print image correctly aligned to the edges of paper so that printing is correct as I stated in the beginning. How can I achieve the same result in xubuntu? Nota Bene: there is a debian install package from Lexmark prepared for 10.10 but it does not work on xubuntu 16.04. This is why I have to print via the other linux machine.

Most recently the default web browser (Firefox) crashes. --safe-mode does not help. Removed, etc. reinstalled, still crashes. Installed chrome - crashes. Completely reinstalled (reformat, etc) 16.04.2 Feb 2017 CD - still crashes. On a side note, even though I checked update while install box after first boot there were 11 updates. Firefox still crashes after 11 updates on a virgin install. This is an older i386 machine with Nvidia graphics card. Everythinhg else works fine. Obviously, I write this on a different machine, 64bit laptop, 16.04.

I read similar posts, but could not find an applicable answer, so here is my situation. Xubuntu sometimes boots OK, but sometimes it is stuck in a loop. Here is what I observed:

After grub default boot: XUbuntu blue screen with rotating arc segment may or may not appear, but if it appears and if the arc segment rotates continuously then boot always ends up in a loop. The loop is showing fsck results then it goes away, hard disk activity, maybe screen activity, then fsck result again. Typical loop time is around a minute or more.

I tried several remedies (pulling plug on computer, on monitor, etc.) none seems to work consistently. Boot loop appears completely random. I could not find clue in dmsg or in some logs.

Recovery boot always OK, and it boots into VGA graphics only.

I have nvidia graphics card and it uses the nouveau driver.

Any suggestions?

EDIT April 25, 2017: While in the loop Ctr=Alt+Fn1 and command sudo /etc/init.d/lightdm stop and sudo journalctl -xe gave me, excerpted:

Apr 25 11:02:12 andrasubuntu NetworkManager[1263]: <info>  [1493132532.7582] device (enp0s4): Activation: successful, device activated.
Apr 25 11:02:12 andrasubuntu whoopsie[704]: [11:02:12] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/0
Apr 25 11:02:12 andrasubuntu whoopsie[704]: [11:02:12] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/0
Apr 25 11:02:12 andrasubuntu whoopsie[704]: [11:02:12] Found usable connection: /org/freedesktop/NetworkManager/ActiveConnection/0
Apr 25 11:02:12 andrasubuntu whoopsie[704]: [11:02:12] online
Apr 25 11:02:13 andrasubuntu sudo[1513]:    janos : TTY=tty1 ; PWD=/home/janos ; USER=root ; COMMAND=/etc/init.d/lightdm start
Apr 25 11:02:13 andrasubuntu sudo[1513]: pam_unix(sudo:session): session opened for user root by janos(uid=0)
Apr 25 11:02:13 andrasubuntu systemd[1]: Starting Light Display Manager...
-- Subject: Unit lightdm.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit lightdm.service has begun starting up.
Apr 25 11:02:13 andrasubuntu dbus[707]: [system] Activating systemd to hand-off: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service'
Apr 25 11:02:25 andrasubuntu dbus[707]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out
Apr 25 11:02:25 andrasubuntu systemd-logind[1462]: Failed to enable subscription: Failed to activate service 'org.freedesktop.systemd1': timed out
Apr 25 11:02:25 andrasubuntu systemd-logind[1462]: Failed to fully start up daemon: Connection timed out
Apr 25 11:02:25 andrasubuntu systemd[1]: systemd-logind.service: Main process exited, code=exited, status=1/FAILURE
Apr 25 11:02:25 andrasubuntu systemd[1]: Failed to start Login Service.
-- Subject: Unit systemd-logind.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit systemd-logind.service has failed.
-- 
-- The result is failed.
Apr 25 11:02:25 andrasubuntu systemd[1]: systemd-logind.service: Unit entered failed state.
Apr 25 11:02:25 andrasubuntu systemd[1]: systemd-logind.service: Failed with result 'exit-code'.
Apr 25 11:02:25 andrasubuntu systemd[1]: systemd-logind.service: Service has no hold-off time, scheduling restart.
Apr 25 11:02:25 andrasubuntu systemd[1]: Stopped Login Service.
-- Subject: Unit systemd-logind.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit systemd-logind.service has finished shutting down.
Apr 25 11:02:25 andrasubuntu systemd[1]: Starting Login Service...
-- Subject: Unit systemd-logind.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit systemd-logind.service has begun starting up.
Apr 25 11:02:37 andrasubuntu dbus[707]: [system] Failed to activate service 'org.freedesktop.PolicyKit1': timed out
Apr 25 11:02:37 andrasubuntu NetworkManager[1263]: <error> [1493132557.5202] auth: could not get polkit proxy: Error calling StartServiceByName for org.freedesktop.PolicyKit1: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.freedesktop.PolicyKit1': timed out
Apr 25 11:02:37 andrasubuntu dbus[707]: [system] Failed to activate service 'fi.w1.wpa_supplicant1': timed out
Apr 25 11:02:37 andrasubuntu NetworkManager[1263]: <warn>  [1493132557.5296] supplicant: failed to acquire wpa_supplicant proxy: Wi-Fi and 802.1x will not be available (Error calling StartServiceByName for fi.w1.wpa_supplicant1: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'fi.w1.wpa_supplicant1': timed out)
Apr 25 11:02:38 andrasubuntu dbus[707]: [system] Failed to activate service 'org.freedesktop.login1': timed out
Apr 25 11:02:38 andrasubuntu lightdm[1531]: ** (lightdm:1531): WARNING **: Failed to get list of logind seats: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.freedesktop.login1': timed out
Apr 25 11:02:38 andrasubuntu dbus[707]: [system] Activating systemd to hand-off: service name='org.freedesktop.Accounts' unit='accounts-daemon.service'
Apr 25 11:02:50 andrasubuntu dbus[707]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out
Apr 25 11:02:50 andrasubuntu systemd-logind[1537]: Failed to enable subscription: Failed to activate service 'org.freedesktop.systemd1': timed out
Apr 25 11:02:50 andrasubuntu systemd-logind[1537]: Failed to fully start up daemon: Connection timed out
Apr 25 11:02:50 andrasubuntu systemd[1]: systemd-logind.service: Main process exited, code=exited, status=1/FAILURE
Apr 25 11:02:50 andrasubuntu systemd[1]: Failed to start Login Service.
-- Subject: Unit systemd-logind.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit systemd-logind.service has failed.
-- 
-- The result is failed.

The loop is clearly visible. It is also evident (to me) that the problem is not nvidia graphics card related. Hope this helps.

Output of lsusb and sane-find-scanner below:

janos@AndrasXubuntu:~/Desktop$ sane-find-scanner

  # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x1205 [hp scanjet scanner]) at libusb:002:002
could not open USB device 0x1d6b/0x0001 at 002:001: Access denied (insufficient permissions)
could not open USB device 0x1d6b/0x0001 at 001:001: Access denied (insufficient permissions)
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

  # Not checking for parallel port scanners.

  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.

  # You may want to run this program as root to find all devices. Once you
  # found the scanner devices, be sure to adjust access permissions as
  # necessary.
janos@AndrasXubuntu:~/Desktop$ scanimage -L
[hp5590] hp5590_get_status: USB-in-USB: got non-zero device status (status 12)
[hp5590] hp5590_init_scanner: scanner reports non-zero status: Device busy

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
janos@AndrasXubuntu:~/Desktop$

Additional info:

(1) gscan2pdf and xsane has the same problem - cannot find device

(2) when I had xubuntu 12.04 scanner worked

(3) if I connect my laptop (same Ubuntu 16.04 as the desktop, but laptop is 64 bit, desktop is 32 bit) then simple scan on laptop works.

Sudo output, see comment below by janos

janos@AndrasXubuntu:~/Desktop$ sudo sane-find-scanner
[sudo] password for janos: 

  # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x1205 [hp scanjet scanner]) at libusb:002:002
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

  # Not checking for parallel port scanners.

  # Most Scanners connected to the parallel port or other proprietary ports
  # can't be detected by this program.
janos@AndrasXubuntu:~/Desktop$ sudo scanimage -L
[hp5590] hp5590_get_status: USB-in-USB: got non-zero device status (status 12)
[hp5590] hp5590_init_scanner: scanner reports non-zero status: Device busy

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
janos@AndrasXubuntu:~/Desktop$ 

Output of lsusb (sorry, I meant to include that the first time when I saked the question)

janos@AndrasXubuntu:~/Desktop$ sudo lsusb
[sudo] password for janos: 
Bus 002 Device 002: ID 03f0:1205 Hewlett-Packard ScanJet 4500C/5550C
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
janos@AndrasXubuntu:~/Desktop$ 

Please note that if I plug the scanner to a different usb socket (e.g. a socket in Bus 001) lsusb will find it there but simple-scan still would not work.

Additional info: I can dual boot this machine to an old installation of Fedora-3. Scanner works there. However, scanimage -L will not find it, lsusb and sane-find-scanner does. See below output of terminal in Fedora-3 boot.

[apu@andraslinux ~]$ su -c "scanimage -L"
Password: 

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
[apu@andraslinux ~]$ /sbin/lsusb
Bus 002 Device 002: ID 03f0:1205 Hewlett-Packard 
Bus 002 Device 001: ID 1d6b:0001  
Bus 001 Device 001: ID 1d6b:0001  
[apu@andraslinux ~]$ sane-find-scanner 

  # No SCSI scanners found. If you expected something different, make sure that
  # you have loaded a SCSI driver for your SCSI adapter.

found USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x1205 [hp scanjet scanner]) at libusb:002:002
  # Your USB scanner was (probably) detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.

Could it be the libusb that enables FC3 to run scanner but Ubuntu 16.04 may not use libusb?

As I mentioned before scanner did work on 12.04 but stopped working after upgrading to 14.04 and now to 16.04

Additional info regarding libusb:

Terminal output is identical for both the 32bit desktop (scanner not working) and 64bit laptop (scanner working), and is here below:

janos@acerlinux:~/Desktop$ dpkg -l libusb
dpkg-query: no packages found matching libusb

In fact, I just checked that my 64bit laptop does not have libsane-dev, and checked again, scanner works if connected to leptop.

Additional info copied here from comments below:

/etc/sane.d/dll.conf was OK, hp5590 was not commented; then I modified /etc/sane.d/hp5400.conf by adding the proper usb line; scanner still not working even though scanimage -L detects it, but reports as busy. See here:

janos@AndrasXubuntu:~/Desktop$ sudo scanimage -L
[sudo] password for janos: 
[hp5590] hp5590_get_status: USB-in-USB: got non-zero device status (status 12)
[hp5590] hp5590_init_scanner: scanner reports non-zero status: Device busy

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
janos@AndrasXubuntu:~/Desktop$ 

One more thing, interestingly, the /etc/sane.d/hp5400.conf file is the same on both 64bit laptop and 32bit Fc3 desktop without having the edited addition of 5590 usb line and yet both work with the scanner except the 32bit Ubuntu desktop since upgrading from 12.04.

Consequently, I think the big question is "Why 32bit 16.04 Ubuntu desktop reports device busy?"

Additional info - revised output of libusb, this time with asterisk:

libusb on 32bit desktop

janos@AndrasXubuntu:~/Desktop$ dpkg -l libusb*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
ii  libusb-0.1-4:i 2:0.1.12-28  i386         userspace USB programming library
ii  libusb-1.0-0:i 2:1.0.20-1   i386         userspace USB programming library
un  libusb-dev     <none>       <none>       (no description available)
un  libusbmuxd-too <none>       <none>       (no description available)
ii  libusbmuxd4:i3 1.0.10-2ubun i386         USB multiplexor daemon for iPhone
janos@AndrasXubuntu:~/Desktop$

libusb on 64bit laptop:

janos@acerlinux:~/Desktop$ dpkg -l libusb*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
ii  libusb-0.1-4:a 2:0.1.12-28  amd64        userspace USB programming library
ii  libusb-1.0-0:a 2:1.0.20-1   amd64        userspace USB programming library
ii  libusb-1.0-0:i 2:1.0.20-1   i386         userspace USB programming library
un  libusb-dev     <none>       <none>       (no description available)
un  libusbmuxd-too <none>       <none>       (no description available)
ii  libusbmuxd4:am 1.0.10-2ubun amd64        USB multiplexor daemon for iPhone
janos@acerlinux:~/Desktop$

Additional info:

According to my notes for FC3 and man sane-usb usbfs has to be mounted in order for scanner to work. So in my FC3 I have a line in fstab containing none /proc/bus. Consequently I looked at the mounted filesystems on 32bit Ubuntu and 64bit Ubuntu. See below comparisons:

32 bit Ubuntu df -ha

janos@AndrasXubuntu:~/Desktop$ sudo df -ha
Filesystem      Size  Used Avail Use% Mounted on
sysfs              0     0     0    - /sys
proc               0     0     0    - /proc
udev            482M     0  482M   0% /dev
devpts             0     0     0    - /dev/pts
tmpfs           100M  5.1M   95M   6% /run
/dev/sda1       9.1G  4.0G  4.7G  47% /
securityfs         0     0     0    - /sys/kernel/security
tmpfs           500M  108K  500M   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           500M     0  500M   0% /sys/fs/cgroup
cgroup             0     0     0    - /sys/fs/cgroup/systemd
pstore             0     0     0    - /sys/fs/pstore
cgroup             0     0     0    - /sys/fs/cgroup/blkio
cgroup             0     0     0    - /sys/fs/cgroup/cpu,cpuacct
cgroup             0     0     0    - /sys/fs/cgroup/cpuset
cgroup             0     0     0    - /sys/fs/cgroup/net_cls,net_prio
cgroup             0     0     0    - /sys/fs/cgroup/freezer
cgroup             0     0     0    - /sys/fs/cgroup/memory
cgroup             0     0     0    - /sys/fs/cgroup/hugetlb
cgroup             0     0     0    - /sys/fs/cgroup/pids
cgroup             0     0     0    - /sys/fs/cgroup/perf_event
cgroup             0     0     0    - /sys/fs/cgroup/devices
systemd-1          0     0     0    - /proc/sys/fs/binfmt_misc
hugetlbfs          0     0     0    - /dev/hugepages
debugfs            0     0     0    - /sys/kernel/debug
mqueue             0     0     0    - /dev/mqueue
fusectl            0     0     0    - /sys/fs/fuse/connections
tmpfs           100M  4.0K  100M   1% /run/user/108
tmpfs           100M   36K  100M   1% /run/user/1000
gvfsd-fuse      0.0K  0.0K  0.0K    - /run/user/1000/gvfs
janos@AndrasXubuntu:~/Desktop$ 

Comparing files on 32bit desktop between FC3 (where scanner works) and Ubuntu

janos@AndrasXubuntu:/media/janos/_1/etc/sane.d$ diff hp5400.conf /etc/sane.d/hp5400.conf
14c14
< #/dev/usb/scanner0
---
> #/dev/usbscanner
janos@AndrasXubuntu:/media/janos/_1/etc/sane.d$ 

64bit Ubuntu df -ha

janos@acerlinux:~/Desktop$ sudo df -ha
[sudo] password for janos: 
Filesystem      Size  Used Avail Use% Mounted on
sysfs              0     0     0    - /sys
proc               0     0     0    - /proc
udev            1.4G     0  1.4G   0% /dev
devpts             0     0     0    - /dev/pts
tmpfs           276M  5.0M  271M   2% /run
/dev/sda5        17G  7.1G  8.5G  46% /
securityfs         0     0     0    - /sys/kernel/security
tmpfs           1.4G  260K  1.4G   1% /dev/shm
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           1.4G     0  1.4G   0% /sys/fs/cgroup
cgroup             0     0     0    - /sys/fs/cgroup/systemd
pstore             0     0     0    - /sys/fs/pstore
cgroup             0     0     0    - /sys/fs/cgroup/hugetlb
cgroup             0     0     0    - /sys/fs/cgroup/cpuset
cgroup             0     0     0    - /sys/fs/cgroup/pids
cgroup             0     0     0    - /sys/fs/cgroup/freezer
cgroup             0     0     0    - /sys/fs/cgroup/memory
cgroup             0     0     0    - /sys/fs/cgroup/cpu,cpuacct
cgroup             0     0     0    - /sys/fs/cgroup/devices
cgroup             0     0     0    - /sys/fs/cgroup/blkio
cgroup             0     0     0    - /sys/fs/cgroup/net_cls,net_prio
cgroup             0     0     0    - /sys/fs/cgroup/perf_event
systemd-1          -     -     -    - /proc/sys/fs/binfmt_misc
hugetlbfs          0     0     0    - /dev/hugepages
mqueue             0     0     0    - /dev/mqueue
debugfs            0     0     0    - /sys/kernel/debug
fusectl            0     0     0    - /sys/fs/fuse/connections
/dev/sda7       3.0G  1.3G  1.7G  44% /mnt/DOS_E
/dev/sda8        22G  6.1G   15G  30% /mnt/save
binfmt_misc        0     0     0    - /proc/sys/fs/binfmt_misc
tmpfs           276M   44K  276M   1% /run/user/1000
gvfsd-fuse      0.0K  0.0K  0.0K    - /run/user/1000/gvfs
janos@acerlinux:~/Desktop$

FC3 df -ha

Filesystem            Size  Used Avail Use% Mounted on
/dev/hdb1              18G  7.0G   11G  41% /
none                     0     0     0   -  /proc
none                     0     0     0   -  /sys
none                     0     0     0   -  /dev/pts
none                  506M     0  506M   0% /dev/shm
none                     0     0     0   -  /proc/bus/usb
none                     0     0     0   -  /proc/sys/fs/binfmt_misc
none                     0     0     0   -  /var/named/chroot/proc

FC3 ls | grep hp5400.conf

hp5400.conf

FC3 ls | grep hp 5550.conf has no output.

Consequently, things noted: (a) neither FC3 nor 64bit Ubuntu laptop has hp5550.conf files yet scanner with both machines work, (b) while neither 32bit nor 64bit Ubuntu has usbfs mounted scanner works on 64bit Ubuntu but not on 32bit Ubuntu.

Additional info on trying proposed package:

janos@AndrasXubuntu:~/Desktop$ sudo dpkg -i libsane-dev_1.0.25+git20150528-1ubuntu2.16.04.1_i386.deb 
[sudo] password for janos: 
(Reading database ... 196333 files and directories currently installed.)
Preparing to unpack libsane-dev_1.0.25+git20150528-1ubuntu2.16.04.1_i386.deb ...
Unpacking libsane-dev (1.0.25+git20150528-1ubuntu2.16.04.1) over (1.0.25+git20150528-1ubuntu2) ...
dpkg: dependency problems prevent configuration of libsane-dev:
 libsane-dev depends on libsane (= 1.0.25+git20150528-1ubuntu2.16.04.1); however:
  Version of libsane:i386 on system is 1.0.25+git20150528-1ubuntu2.

dpkg: error processing package libsane-dev (--install):
 dependency problems - leaving unconfigured
Processing triggers for doc-base (0.10.7) ...
Processing 1 changed doc-base file...
Processing triggers for man-db (2.7.5-1) ...
Errors were encountered while processing:
 libsane-dev
janos@AndrasXubuntu:~/Desktop$ sudo dpkg -i libsane_1.0.25+git20150528-1ubuntu2.16.04.1_i386.deb 
[sudo] password for janos: 
(Reading database ... 196333 files and directories currently installed.)
Preparing to unpack libsane_1.0.25+git20150528-1ubuntu2.16.04.1_i386.deb ...
Unpacking libsane:i386 (1.0.25+git20150528-1ubuntu2.16.04.1) over (1.0.25+git20150528-1ubuntu2) ...
dpkg: dependency problems prevent configuration of libsane:i386:
 libsane:i386 depends on libsane-common (= 1.0.25+git20150528-1ubuntu2.16.04.1); however:
  Version of libsane-common on system is 1.0.25+git20150528-1ubuntu2.

dpkg: error processing package libsane:i386 (--install):
 dependency problems - leaving unconfigured
Processing triggers for libc-bin (2.23-0ubuntu7) ...
Errors were encountered while processing:
 libsane:i386
janos@AndrasXubuntu:~/Desktop$

This may be a stupid or trivial question, but I am new to Ubuntu, and have two unsolved problems (flashplayer doesn't play, and scanner doesn't work - in virgin install 13.04), so I started to search in documentation. In the 13.04 specific web site I was browsing the hardware section, and came across something like this: "Open Dash, and select Disk Utilities".

So what is Dash, and where is Disk Utilities?

The application finder could not find any of those. In terminal the "dash" command seems to invoke some sort of a shell.