Dave Kimble's questions

Ubuntu_20.04, kernel 5.4.0-52-generic.

I have a new Seagate 8TB HDD attached via USB3 cable to an external drive interface card (labelled "Raptor 3.5 Main Board V3R1 2011/07/19", includes 12V power pack). The drive shows as 1.28 TB in gnome-disk utility on /dev/sdb1 mount at /media/dk/8TB. The drive's Partition Table is GPT. The drive is formatted as ext4 (or ext3 or NTFS).

hdparm shows:

$ sudo hdparm -I /dev/sdb1

/dev/sdb1:

ATA device, with non-removable media
    Model Number:       ST8000DM004-2CX188                      
    Serial Number:      ZCT2W041
    Firmware Revision:  0001    
    Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
    Used: unknown (minor revision code 0x006d) 
    Supported: 10 9 8 7 6 5 
    Likely used: 10
Configuration:
    Logical     max current
    cylinders   16383   16383
    heads       16  16
    sectors/track   63  63
    --
    CHS current addressable sectors:    16514064
    LBA    user addressable sectors:   268435455
    LBA48  user addressable sectors: 15628053168
    Logical  Sector size:                   512 bytes
    Physical Sector size:                  4096 bytes
    Logical Sector-0 offset:                  0 bytes
    device size with M = 1024*1024:     7630885 MBytes
    **device size with M = 1000*1000:     8001563 MBytes (8001 GB)**
    cache/buffer size  = unknown
    Form Factor: 3.5 inch
    Nominal Media Rotation Rate: 5425
Capabilities:
    LBA, IORDY(can be disabled)
    Queue depth: 32
    Standby timer values: spec'd by Standard, no device specific minimum
    R/W multiple sector transfer: Max = 16  Current = 16
    Recommended acoustic management value: 208, current value: 208
    DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
         Cycle time: min=120ns recommended=120ns
    PIO: pio0 pio1 pio2 pio3 pio4 
         Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
    Enabled Supported:
       *    SMART feature set
            Security Mode feature set
       *    Power Management feature set
       *    Write cache
       *    Look-ahead
       *    Host Protected Area feature set
       *    WRITE_BUFFER command
       *    READ_BUFFER command
       *    DOWNLOAD_MICROCODE
            Power-Up In Standby feature set
       *    SET_FEATURES required to spinup after power up
            SET_MAX security extension
       *    48-bit Address feature set
       *    Mandatory FLUSH_CACHE
       *    FLUSH_CACHE_EXT
       *    SMART error logging
       *    SMART self-test
       *    General Purpose Logging feature set
       *    WRITE_{DMA|MULTIPLE}_FUA_EXT
       *    64-bit World wide name
            Write-Read-Verify feature set
       *    WRITE_UNCORRECTABLE_EXT command
       *    {READ,WRITE}_DMA_EXT_GPL commands
       *    Segmented DOWNLOAD_MICROCODE
            unknown 119[6]
       *    unknown 119[7]
       *    Gen1 signaling speed (1.5Gb/s)
       *    Gen2 signaling speed (3.0Gb/s)
       *    Gen3 signaling speed (6.0Gb/s)
       *    Native Command Queueing (NCQ)
       *    Host-initiated interface power management
       *    Phy event counters
       *    READ_LOG_DMA_EXT equivalent to READ_LOG_EXT
            DMA Setup Auto-Activate optimization
            Device-initiated interface power management
       *    Software settings preservation
            unknown 78[7]
       *    SMART Command Transport (SCT) feature set
       *    SCT Write Same (AC2)
       *    SCT Data Tables (AC5)
            unknown 206[7]
            unknown 206[12] (vendor specific)
            unknown 206[13] (vendor specific)
       *    DOWNLOAD MICROCODE DMA command
Security: 
    Master password revision code = 65534
        supported
    not enabled
    not locked
    not frozen
    not expired: security count
        supported: enhanced erase
    964min for SECURITY ERASE UNIT. 964min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5000c500c6805821
    NAA     : 5
    IEEE OUI    : 000c50
    Unique ID   : 0c6805821
Checksum: correct
$

Note that the logical Sector Size is 512 bytes and the physical Sector Size is 4096 bytes, and
Device Size = Cylinders x Heads x Sectors/Track x bytes/Sector = 8,001,563 MBytes.
But all other applications (gnome-disk-utility, gparted, fdisk, File Manager, etc.) see only 1.28 TB.
An existing 2TB HDD is seen as 2 TB and works OK.
On my laptop running LXLE (based on 18.04) it is the same.
This seems to point towards an error in the kernel.
Too many diagnostics to give here. I will update this if needed.

I am on Ubuntu 20.04 and PHP 7.4.3 .
I want to try using php-gtk, but I am finding it very confusing.

• Is the project still alive?
• What are the prerequisites - can they really mean PHP-5.1 or 5.2 (EOL 6 Jan 2011)?
• Does "or later" include PHP 7.4?

I have downloaded and unzipped the sources into /php-gtk-src-master. It contains a buildconf script, but this fails with "no phpize". Somehow I installed phpize, but then buildconf says:

make[1]: *** No rule to make target 'configure.in', needed by 'aclocal.m4'.  Stop.  
make: *** [build2/build.mk:12: all] Error 2  

I have used wxPHP, but this died after PHP 5.6. It was restarted with PHP_7 last year, but the developer disappeared without doing any documentation, and is effectively dead again.

I have looked at QT 5.15, but my request for support died after a few emails.

I need a script to follow that works starting from a clean install of Ubuntu 20.04 .

My mini-PC has Intel i7 running Lubuntu-18.04.
It has 2 monitor outputs, one HDMI and one DisplayPort.
The HDMI port has a HDMI monitor (E2441) plugged into it.
The DisplayPort has a DisplayPort-HDMI converter in it, with a big HDMI TV screen plugged into it, and switched on.

But Menu > Preferences > Monitor Settings (lxrandr) only shows 1 monitor attached.

/var/log/syslog shows:  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011ports:  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011hdmi-output-1: HDMI / DisplayPort 2 (priority 5800, latency offset 0 usec, available: yes)  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011properties:  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011#011device.icon_name = "video-display"  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011#011device.product.name = "E2441"  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011active port: <hdmi-output-1>  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: 2 source(s) available.  

Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011properties:  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: no)  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011properties:  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011#011device.icon_name = "video-display"  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011hdmi-output-1: HDMI / DisplayPort 2 (priority 5800, latency offset 0 usec, available: yes)  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011properties:  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011#011device.icon_name = "video-display"  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011#011device.product.name = "E2441"  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011hdmi-output-2: HDMI / DisplayPort 3 (priority 5700, latency offset 0 usec, available: no)  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011properties:  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011#011device.icon_name = "video-display"  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011hdmi-output-3: HDMI / DisplayPort 4 (priority 5600, latency offset 0 usec, available: no)  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011properties:  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011#011device.icon_name = "video-display"  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011hdmi-output-4: HDMI / DisplayPort 5 (priority 5500, latency offset 0 usec, available: no)  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011properties:  
Oct 17 07:56:06 i7 pulseaudio[2107]: [pulseaudio] main.c: #011#011#011#011device.icon_name = "video-display"  

The "available: no" seems to be the problem.
Does it need a special driver?

$ xrandr  
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192  
DP-1 disconnected primary (normal left inverted right x axis y axis)  
HDMI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 299mm  
   1920x1080     60.00*+  50.00    59.94    
   1920x1080i    60.00    50.00    59.94   
   1680x1050     59.88   
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    60.00  
   832x624       74.55  
   800x600       75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    60.00    59.94  
   720x400       70.08  
$ uname -a  
Linux i7 4.15.0-65-generic #74-Ubuntu SMP Tue Sep 17 17:06:04 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux  

This says it will load all HWE modules:
https://wiki.ubuntu.com/Kernel/LTSEnablementStack#Ubuntu_14.04_LTS_-_Trusty_Tahr says for Bionic:
$ sudo apt-get install --install-recommends linux-generic-hwe-18.04 xserver-xorg-hwe-18.04

I tried it, followed by a reboot - but still no change, apart from:

$ uname -a
Linux i7 5.0.0-31-generic #33~18.04.1-Ubuntu SMP Tue Oct 1 10:20:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

External monitor not detected on Ubuntu 18.04 is a similar problem with different hardware.
It seems to show that nobody agrees what fixes it.

What next?

I don't know what any of this means, but maybe somebody does.
$ sudo lshw -c video
name: i915
$ modinfo i915
filename: /lib/modules/5.0.0-32-generic/kernel/drivers/gpu/drm/i915/i915.ko
license: GPL and additional rights
description: Intel Graphics
author: Intel Corporation
...
parm: enable_dp_mst:Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true) (bool)
parm: enable_dpcd_backlight:Enable support for DPCD backlight control (default:false) (bool)
parm: enable_gvt:Enable support for Intel GVT-g graphics virtualization host support(default:false) (bool)
(full listing at https://davekimble.net/problem.DP.txt)

/sys/class/drm/card0/card0-DP-1/status = "disconnected"
/sys/class/drm/card0/card0-HDMI-A-1/status = "connected"

Lubuntu-18.04
I have just bought a bluetooth headset, and it doesn't connect.
It has an optional 3.5mm cable, which if I plug it into Line-out, the earphones play OK.
It also connects via bluetooth to an android device OK.
I didn't have a tray icon for bluetooth showing, but one has now appeared.
When I run blueman-manager, or whatever it is that is titled "Bluetooth Devices", Adapter and Device and all the options on the toolbar are greyed out and the list is empty.
Tray icon > Set Up New Device opens a window titled "Blueman Assistant" and says "No adapters found".
Please walk me through the basic system and diagnostics.

Updated

$ systemctl status bluetooth  
● bluetooth.service - Bluetooth service  
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset  
   Active: active (running) since Thu 2019-06-27 14:32:15 AEST; 1h 45min ago  
     Docs: man:bluetoothd(8)  
 Main PID: 24506 (bluetoothd)  
   Status: "Running"  
    Tasks: 1 (limit: 4372)  
   CGroup: /system.slice/bluetooth.service  
           └─24506 /usr/lib/bluetooth/bluetoothd  

Jun 27 14:32:15 desktop systemd[1]: Starting Bluetooth service...  
Jun 27 14:32:15 desktop bluetoothd[24506]: Bluetooth daemon 5.48  
Jun 27 14:32:15 desktop systemd[1]: Started Bluetooth service.  
Jun 27 14:32:15 desktop bluetoothd[24506]: Starting SDP server  
Jun 27 14:32:15 desktop bluetoothd[24506]: Bluetooth management interface 1.14 i  
$ 

Updated

On reboot the tray icon is missing and "systemctl status bluetooth" says "Active: inactive (dead)".

"/etc/init.d/bluetooth" says "Usage: /etc/init.d/bluetooth {start|stop|restart|force-reload|status}"

"/etc/init.d/bluetooth start" says "[ ok ] Starting bluetooth (via systemctl): bluetooth.service.
$" ( that is, NOT "started").

Menu > Preferences > Bluetooth Manager says "". Subsequent attempts to launch Bluetooth Manager don't produce a window.

$ /usr/sbin/bluetoothd
D-Bus setup failed: Connection ":1.94" is not allowed to own the service "org.bluez" due to security policies in the configuration file
$

This error message is completely unhelpful without saying which security policy in which configuration file. This may go some way to explaining why there are 2,430 questions tagged "bluetooth" on AskUbuntu. I have spent 2 1/2 days trying get these headphones to work, and I'm still no further forward.

I know this has been asked before, but have there been any changes recently?

My server machine runs under Ubuntu-18.04 Server (+ lxde).
It has apache-2.4.29 with 2 domains, both with http and https.
It also has a mail server, citadel-917, which has its own webserver for webmail.
At boot up apache2 should use ports 80 and 443, and citadel should use 8080 and 8081.

But Firefox-65.0 gets "Secure Connection Failed. Error code: SSL_ERROR_RX_RECORD_TOO_LONG"
despite "sudo systemctl restart apache2" working without errors and opening port 443.
How can Apache2 and Firefox produce no intelligible error messages when it the system not working?
And how do I fix it? or even find out what is wrong?

I have updated my LetsEncrypt certificates and stared at the conf files and they all look OK.
I have done "apachectl configtest" and it says "syntax OK".
"netstat -nlp" shows port 80 and 443 are listening, but only for tcp6, not tcp, is this right?
gufw-report shows 443 applies to both TCP and TCP(v6).
/var/log/apache2/error.log is OK.
"curl https://mydomain.com" produces:
curl: (35) error:1408F10B:SSL routines:ssl3_get_record:wrong version number
I have had this working before a recent clean install.

Can anyone recommend web server software that produces intelligible error messages?

Toshiba Satellite C50-B, Lubuntu 18.04.

Since 18.04, when the laptop is booting there are light blue lines at the top and bottom of the screen, about 4 pixels thick. When running with application maximized, the small gap is still there.

xrandr is so complicated I can't understand it.
lxrandr only says what its got: eDP-1: 1366x768 60 fps
arandr doesn't say how to use it.

How can I make the "desktop area" fill the physical screen?

When I installed Lubuntu 18.04 alongside 16.04 and 14.04 it went OK apart from installing grub at the end. When switching on, I chose an entry from the hardware's boot device menu and it didn't work. I then chose the EFI entry and it worked OK.

But installing applications fails in shim-signed (/usr/lib/grub/i386-pc/modinfo.sh doesn't exist) and grub-efi-amd64-signed (cannot find EFI directory)

The applications launch and working OK, but scripts that include installing are thrown by the errors. I don't think I have an EFI process (?) or a need for one.

How can I unscramble this without starting from scratch ?

Following https://developer.ubuntu.com/en/phone/devices/installing-ubuntu-for-devices/

Model Samsung GT-S7392

Android 4.1.2

Android > Settings > Developer Options > USB Debugging = checked Android > Settings > Developer Options > USB Connection = MTP

$ sudo add-apt-repository ppa:ubuntu-sdk-team/ppa
$ sudo apt-get update
$ sudo apt-get install ubuntu-device-flash phablet-tools
$ adb reboot bootloader  // phone reboots to normal screen !
$ fastboot devices
$ sudo fastboot oem unlock
< waiting for device >   // Control+C

I've seen some talk of which phones this might work on, but nothing on the web page above. Should it work on my Samsung?

My Intel motherboard has a TPM 2.0 chip. Ubuntu 13.04 seems to have a driver for it, but what does it do with it, anything? Can it be switched off/disabled?

This question is like Is it possible to add a notification message when a VPN gets connected? . The python script in the answer there (see below) works OK on 13.04, but it only notifies on making new connections, not when a VPN connection is disconnected, which is much more important since it can happen at any time.

Can someone please tweak the script for disconnections?

Alternatively, where is the network connection (for VPN) tray icon held in the file system, so I can change it - the miniature padlock is so tiny it is barely visible. Reversed foreground/background colours would be better.

import gtk  
import pynotify  
import dbus  
from dbus.mainloop.glib import DBusGMainLoop  
def vpn_connection_handler(*args, **keywords):  
    state = args[0].get('State',0)  
    if state == 2:  
        n = pynotify.Notification ("VPN", "Connection established")  
        n.show()  
pynotify.init ("icon-summary-body")  
dbus_loop = DBusGMainLoop()  
system_bus = dbus.SystemBus(mainloop=dbus_loop)  
system_bus.add_signal_receiver(vpn_connection_handler,  
    dbus_interface="org.freedesktop.NetworkManager.VPN.Connection",  
    signal_name="PropertiesChanged")  
gtk.gdk.threads_init()  
gtk.main()