I want to run an application that uses python2.7 version, but by default python2.7 is not installed. When I tried to use:
$ virtualenv -p python2 flaskold
It returned:
RuntimeError: failed to find interpreter for Builtin discover of python_spec='python2'
How could I create python2.7 virtual environment on Ubuntu 20.04 which goes without python 2.7 support?
How could I install libnginx-mod-http-passenger on 20.04?
After upgrade from 19.10 to 20.04 I've autoremoved a lot of deprecated packages. During hplip upgrade I've confirmed using maintainer's version of configuration files. But after Ubuntu restarting, hp 1020 printer stopped printing. Hplip toolbox hanged each time I was refreshing its window. So I've purged and uninstalled hplip completely.
Installing using this guide installs hplip 3.20.3 version which have been installed earlier.
So I've downloaded 3.20.5 version from here for Ubuntu, chmoded it with x permission and run it: ./hplip-3.20.5.run.
It asked if I want to install missing dependencies:
Package-Name Component Required/Optional
pyqt5-dbus gui_qt5 OPTIONAL
reportlab fax OPTIONAL
pyqt5 gui_qt5 REQUIRED
python-notify gui_qt5 OPTIONAL
I said y, but, for python-pyqt5 package I've got:
error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-pyqt5'
Please wait, this may take several minutes...
error: Package install command failed with error code 100
For python-dbus.mainloop.pyqt5 package:
error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-dbus.mainloop.pyqt5'
Please wait, this may take several minutes...
error: Package install command failed with error code 100
For python-notify package:
error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-notify'
Please wait, this may take several minutes...
error: Package install command failed with error code 100
For python-reportlab:
error: Command failed. Re-try #3...
Running 'sudo apt-get install --assume-yes python-reportlab'
Please wait, this may take several minutes...
error: Package install command failed with error code 100
I've skipped these packages installation because it was impossible to install them. At the end, I've got the next errors:
warning: Some HPLIP functionality might not function due to missing package(s).
error: A required dependency 'pyqt5 (PyQt 5- Qt interface for Python (for Qt version 4.x))' is still missing.
RUNNING POST-PACKAGE COMMANDS
-----------------------------
OK
RE-CHECKING DEPENDENCIES
------------------------
error: A required dependency 'pyqt5 (PyQt 5- Qt interface for Python (for Qt version 4.x))' is still missing.
error: Installation cannot continue without this dependency.
error: Please manually install this dependency and re-run this installer.
I've also downloaded hplip-3.20.5-plugin.run from here
$ bash hplip-3.20.5-plugin.run
Verifying archive integrity... All good.
Uncompressing HPLIP 3.20.5 Plugin Self Extracting Archive..............................................................
Error setting home directory: /etc/hp/hplip.conf not found. Is HPLIP installed?
Universe/Multiverse repositories are enabled, but:
$ apt-cache search python-pyqt5
python-pyqt5.qwt-doc - Python Qwt6 technical widget library, documentation and examples
$ apt-cache search python-reportlab
python-reportlab-doc - Documentation for the ReportLab Python library (PDF format)
$ apt-cache search python-dbus.mainloop.pyqt5
$ apt-cache search python-notify
python3-notify2 - desktop notifications API for Python 3
Packages python3-pyqt5, python3-reportlab, python3-notify2, python3-dbus.mainloop.pyqt5 are installed and are already the newest versions.
I could also see, for example, python-pyqt5 package is available in 19.10 repository, but this package requires qtbase-abi-5-12-4 package which does not exist there in eoan's repository. 18.04's python-pyqt5 package requires different qtbase-abi package, which is not present in bionic's repository.
Does it mean, phlip-3.20.5 is not compatible with 20.04 or maybe there some additional repository exists which contains these four packages and theirs dependencies?
Update:
Installed hplip, hplip-data, hplip-gui packages.
Launched hplip-gui from launcher
Received the log in journalctl -f:
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: error: Unable to locate models.dat file
Jun 07 23:14:13 ubuntu /hp-toolbox[17823]: [17823]: error: Unable to locate models.dat file
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: HP Linux Imaging and Printing System (ver. 0.0.0)
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: HP Device Manager ver. 15.0
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: Copyright (c) 2001-18 HP Development Company, LP
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: This software comes with ABSOLUTELY NO WARRANTY.
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: This is free software, and you are welcome to distribute it
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: under certain conditions. See COPYING file for more details.
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: Traceback (most recent call last):
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: File "/usr/bin/hp-toolbox", line 269, in <module>
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: QApplication, ui_package = utils.import_dialog(ui_toolkit)
Jun 07 23:14:13 ubuntu hplip.desktop[17823]: TypeError: cannot unpack non-iterable NoneType object
hplip-gui have not been started: nothing appeared on the desktop.
Newer hplip-3.20.6 also does not support Ubuntu 20.04.
I'm trying to configure keyboard layout switching by keyboard shortcut in Openbox DE.
$ cat /etc/default/keyboard
XKBLAYOUT="us,ua,ru"
XKBVARIANT=",winkeys,"
BACKSPACE="guess"
XKBMODEL="pc105"
XKBOPTIONS="grp:alt_shift_toggle,grp:win_space_toggle,grp_led:scroll"
$ cat /etc/bash.bashrc | grep kblayout
source /home/user/.kblayout.sh
$ cat /home/user/.kblayout.sh
#!/bin/bash
setxkbmap -layout us,ru,ua -option grp:lwin_space_toggle
$ setxkbmap -print -verbose 10
Setting verbose level to 10
locale is C
Trying to load rules file /usr/share/X11/xkb/rules/evdev...
Success.
Applied rules from /usr/share/X11/xkb/rules/evdev:
rules: /usr/share/X11/xkb/rules/evdev
model: pc105
layout: us
options: grp:alt_shift_toggle,grp:lalt_lshift_toggle,grp:alt_shift_toggle,grp:win_space_toggle,grp_led:scroll,grp:alt_shift_toggle,grp_led:scroll
Trying to build keymap using the following components:
keycodes: evdev+aliases(qwerty)
types: complete
compat: complete+ledscroll(group_lock)
symbols: pc+us+inet(evdev)+group(win_space_toggle)+group(lalt_lshift_toggle)+group(alt_shift_toggle)
geometry: pc(pc105)
xkb_keymap {
xkb_keycodes { include "evdev+aliases(qwerty)" };
xkb_types { include "complete" };
xkb_compat { include "complete+ledscroll(group_lock)" };
xkb_symbols { include "pc+us+inet(evdev)+group(win_space_toggle)+group(lalt_lshift_toggle)+group(alt_shift_toggle)" };
xkb_geometry { include "pc(pc105)" };
};
$ cat .config/gxkb/gxkb.cfg
[xkb config]
group_policy=2
default_group=0
never_modify_config=false
model=pc105
layouts=us,ru,ua
variants=
toggle_option=grp:lwin_toggle,lv3:switch,terminate:ctrl_alt_bksp,grp_led:scroll
compose_key_position=
$ cat /etc/X11/xorg.conf
Section "InputClass"
Identifier "system-keyboard"
MatchIsKeyboard "on"
Option "XkbLayout" "us,ru,ua"
Option "XkbModel" "pc105"
Option "XkbVariant" "pc105"
Option "XkbOptions" "grp:alt_shift_toggle,grp_led:scroll"
EndSection
For terminal window input keyboard layout could be changed with those options by Win+Space and Alt+Shift after I run new instance of bash. For new instance of bash it works, but not for bash in just opened terminal. setxkbmap -layout ru or whatever also works in terminal. In current terminal session without running new instance of bash I run setxkbmap command or source a script with that command. But nothing of it works in Openbox GUI applications.
I've installed tint2 panel to be able to switch keyboard layouts by mouse clicking.
Keyboard shortcuts in IBus Preferences -> Keyboard Shortcuts do not actually change keyboard layout. Tried different keys combinations:
The same preferences somehow work in iceWM, but it works strangely there (when I type in different non-english layout, it often inputs English letters instead of Cyrillic letters. It require removing that letters a few times till letters become Cyrillic). I do not often use Cyrillic and I could log in into Unity for normal keyboard layout switching, but I want to figure out, how to configure it correctly in Openbox.
I have a Virtualbox 6.1. The issue have been noticed in 19.10 with this VirtualBox version and emerged again in 20.04. Since VirtualBox 6.0 without this issue requires older dependencies to be installed, the issue becomes actual again.
$ sudo apt install virtualbox=6.0.14-dfsg-1
...
virtualbox : Depends: python3 (< 3.8) but 3.8.2-0ubuntu2 is to be installed
Depends: python3.7 but it is not installable
Depends: libgsoap-2.8.75 but it is not installable
Depends: libpython3.7 (>= 3.7.0) but it is not installable
Guest additions are installed. Disk is dynamic, VDI, ext4 on SATA, AHCI controller.
$ df -h | grep -v snap | grep -v tmpfs | grep -v udev
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 24G 8,9G 14G 39% /
$ sudo fdisk -l
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 51126271 51124224 24,4G 83 Linux
$ cat /etc/fstab
UUID=c63a430c-8a90-4548-a13a-1702169d4ba2 / ext4 errors=remount-ro 0 1
/swapfile none swap sw 0 0
When I was booting OS as usual without selecting a kernel to boot from, it just wait some time before booting without displaying anything.
Hitting Esc button just after VirtualBox logo appearing, I entered into Advanced options for Ubuntu and selected for loading Ubuntu, with Linux 5.3.0-42-generic kernel.
In this case the next is displayed:
Loading Linux 5.3.0-42-generic ... # (which took for about 2-9 secs)
Loading initial ramdisk ... # (which took for about 30-35 secs)
Other 16.04 guest with similar characteristics behaves the same way as 18.04 do.
Host with 19.10 loads ramdisk in 4 seconds. No dual boot. Only Ubuntu installed. Filesystem is ext4. RAM: 16Gb. Disk: SSD.
On other my weaker PC with Virtualbox 6.1.6 (Core 2 Duo 8400, 8Gb, SSD with 2 cores and 3.2 Gb RAM for VM) 5.4.0.28 kernel loads in 10 seconds, initial ramdisk loads in 58 seconds.
Why ramdisk requires so much time to be loaded and how this time could be reduced?
I wanted to test my laptop's and pc's graphics cards by playing supertux2. It turned out that Lenovo G550 GL40 graphical chipset works better then Nvidia G220 on PC. Graphics on Nvidia GT220 with proprietary drivers installed works with short time lags happening every 20-30 seconds even if processor almost idle.
I tested supertux2 v0.6.0 and passed all available game maps, so To be continued... message appeared. It was interesting to watch maps that should be further. So I decided to install the current development version of supertux2. The question is how?
I want to show sshd.service notifications on the desktop to know if someone is connected to my PC using ssh.
I could track changes by using terminal and running journalctl -t sshd -f, but it requires additional attention from me in case of opening terminal every time, running the command and tracking changes.
I've compiled a new kernel based on 5.4.18-xanmod10 kernel. Then I've installed it:
sudo dpkg -i linux*5.4.18-xanmod10-custom*.deb
But after installing, it have not been found by update-grub2:
root@lenovo:~# ls /boot/
config-5.3.0-29-lowlatency memtest86+.elf
config-5.4.18-xanmod10-custom memtest86+_multiboot.bin
config-5.5.0-3.2-liquorix-amd64 System.map-5.3.0-29-lowlatency
config-5.5.0-4.1-liquorix-amd64 System.map-5.4.18-xanmod10-custom
config-5.5.4-xanmod3 System.map-5.5.0-3.2-liquorix-amd64
grub System.map-5.5.0-4.1-liquorix-amd64
initrd.img System.map-5.5.4-xanmod3
initrd.img-5.3.0-29-lowlatency vmlinuz
initrd.img-5.4.18-xanmod10-custom vmlinuz-5.3.0-29-lowlatency
initrd.img-5.5.0-3.2-liquorix-amd64 vmlinuz-5.4.18-xanmod10-custom
initrd.img-5.5.0-4.1-liquorix-amd64 vmlinuz-5.5.0-3.2-liquorix-amd64
initrd.img-5.5.4-xanmod3 vmlinuz-5.5.0-4.1-liquorix-amd64
initrd.img.old vmlinuz-5.5.4-xanmod3
memtest86+.bin vmlinuz.old
root@lenovo:~# update-grub2
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.3.0-29-lowlatency
Found initrd image: /boot/initrd.img-5.3.0-29-lowlatency
Found linux image: /boot/vmlinuz-5.3.0-29-lowlatency
Found initrd image: /boot/initrd.img-5.3.0-29-lowlatency
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done
There're other kernels present, but after reboot only lowlatency kernel and memtest are present in the grub menu. Also, during update it shows the same kernel two times. Previously, before generic cernels moving to another folder, generic and lowlatency kernels have been listed during grub update.
How could I resolve this issue?
I tried to enable unattended access by:
sudo anydesk
But after OK button clicking Unattended Access settings have not been changed:
Also, connecting to this PC remotely shows a message that connection should be accepted on the other side.
Is there another way I could configure unattended access in ubuntu?
My Bluetooth adapter does not work in Ubuntu.
$ lsusb | grep tooth
Bus 002 Device 003: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
$ hciconfig
hci0: Type: Primary Bus: USB
BD Address: 33:03:30:09:74:B4 ACL MTU: 360:4 SCO MTU: 0:0
DOWN
RX bytes:1106 acl:0 sco:0 events:56 errors:0
TX bytes:736 acl:0 sco:0 commands:60 errors:0
$ sudo hciconfig hci0 up
Can't init device hci0: Operation not supported (95)
$ bluetoothctl
Agent registered
[bluetooth]# power on
No default controller available
$ hcitool dev
Devices:
$
$ rfkill
ID TYPE DEVICE SOFT HARD
0 bluetooth hci0 unblocked unblocked
1 wlan phy0 unblocked unblocked
Tried the last two actions:
Bluetake
Works out-of-the-box in Ubuntu v10.04 ~ 11.04 but stopped working reliably in 11.10, frequent kernel panics and other general not good stuff, [Bug: 901770]
$ lsusb <br>Bus 007 Device 003: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
$ hciconfig -a hci0 <br>Manufacturer: Cambridge Silicon Radio (10)Might need same fix as Belkin : add
blacklist hci_usbto/etc/modprobe.d/blacklist.conf, and addhci_usb reset=1to/etc/modules
Also tried
5.3.0-29-generic kernel.$ make -C /lib/modules/$(uname -r)/build M=$PWD modules
make: Entering directory '/usr/src/linux-headers-5.3.0-29-generic'
CC [M] /home/spacer/kernel/bluetooth/hci_vhci.o
/home/spacer/kernel/bluetooth/hci_vhci.c: In function ‘vhci_create_device’:
/home/spacer/kernel/bluetooth/hci_vhci.c:134:2: warning: dereferencing ‘void *’ pointer
134 | *skb_put(skb, 1) = 0xff;
| ^~~~~~~~~~~~~~~~
/home/spacer/kernel/bluetooth/hci_vhci.c:134:19: error: invalid use of void expression
134 | *skb_put(skb, 1) = 0xff;
| ^
/home/spacer/kernel/bluetooth/hci_vhci.c:135:2: warning: dereferencing ‘void *’ pointer
135 | *skb_put(skb, 1) = dev_type;
| ^~~~~~~~~~~~~~~~
/home/spacer/kernel/bluetooth/hci_vhci.c:135:19: error: invalid use of void expression
135 | *skb_put(skb, 1) = dev_type;
| ^
/home/spacer/kernel/bluetooth/hci_vhci.c: In function ‘vhci_get_user’:
/home/spacer/kernel/bluetooth/hci_vhci.c:203:19: error: ‘HCI_BREDR’ undeclared (first use in this function)
203 | if (dev_type != HCI_BREDR && dev_type != HCI_AMP)
| ^~~~~~~~~
/home/spacer/kernel/bluetooth/hci_vhci.c:203:19: note: each undeclared identifier is reported only once for each function it appears in
/home/spacer/kernel/bluetooth/hci_vhci.c: In function ‘vhci_open_timeout’:
/home/spacer/kernel/bluetooth/hci_vhci.c:307:43: error: ‘HCI_BREDR’ undeclared (first use in this function)
307 | vhci_create_device(data, amp ? HCI_AMP : HCI_BREDR);
| ^~~~~~~~~
/home/spacer/kernel/bluetooth/hci_vhci.c: At top level:
/home/spacer/kernel/bluetooth/hci_vhci.c:352:3: error: ‘const struct file_operations’ has no member named ‘aio_write’
352 | .aio_write = vhci_write,
| ^~~~~~~~~
/home/spacer/kernel/bluetooth/hci_vhci.c:352:15: error: positional initialization of field in ‘struct’ declared with ‘designated_init’ attribute [-Werror=designated-init]
352 | .aio_write = vhci_write,
| ^~~~~~~~~~
/home/spacer/kernel/bluetooth/hci_vhci.c:352:15: note: (near initialization for ‘vhci_fops’)
/home/spacer/kernel/bluetooth/hci_vhci.c:352:15: error: initialization of ‘ssize_t (*)(struct file *, const char *, size_t, loff_t *)’ {aka ‘long int (*)(struct file *, const char *, long unsigned int, long long int *)’} from incompatible pointer type ‘ssize_t (*)(struct kiocb *, const struct iovec *, long unsigned int, loff_t)’ {aka ‘long int (*)(struct kiocb *, const struct iovec *, long unsigned int, long long int)’} [-Werror=incompatible-pointer-types]
/home/spacer/kernel/bluetooth/hci_vhci.c:352:15: note: (near initialization for ‘vhci_fops.write’)
cc1: some warnings being treated as errors
make[1]: *** [scripts/Makefile.build:290: /home/spacer/kernel/bluetooth/hci_vhci.o] Error 1
make: *** [Makefile:1655: _module_/home/spacer/kernel/bluetooth] Error 2
make: Leaving directory '/usr/src/linux-headers-5.3.0-29-generic'
I use Budgie DM on Ubuntu 19.10 (firstly noticed on 19.04).
I've installed kmplayer using
sudo apt install kmplayer
When I run kmplayer from terminal: $ kmplayer, it runs successfully throwing only:
Invalid Context= "Mimetypes" line for icon theme: "/usr/share/icons/Faba/symbolic/mimetypes/"
Icon theme "elementary" not found.
I can drag and drop videos into it and it plays them.
But when I try to open kmplayer using desktop menu, its icon appears on dock panel and disappears after 15 seconds without main window opening.
Also, when I try to open a video using Context menu -> Open with -> Kmplayer it behaves the same wrong way.
Gnome MPV, VLC, Parole Media Player open videos without issues.
KMPlayer version: 0.12.0b (c) 2002-2016, Koos Vriezen
Why could it be opened by terminal command and could not be opened by Menu item clicking or by opening video using Open with context menu clicking?
I don't know how accessibility like zoom feature have appeared. Maybe I have input some keys' combination. I don't know how to get rid of it. I've tried to disable it in:
Start menu -> Settings Manager -> Settings Editor -> xfwm4
unchecking zoom_desktop value, but this frame have not disappeared.
Here it is:
