Dual screen not working

[Denis Vergain]

Ubuntu 5.11.0-25.27~20.04.1-generic 5.11.22
Dual screen issue with kernel family 5.11.
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: denis 2641 F.... pulseaudio
 /dev/snd/controlC2: denis 2641 F.... pulseaudio
 /dev/snd/controlC1: denis 2641 F.... pulseaudio
 /dev/snd/pcmC1D3p: denis 2641 F...m pulseaudio
CasperMD5CheckResult: skip
DistroRelease: Linux Mint 20.2
InstallationDate: Installed on 2020-07-25 (400 days ago)
InstallationMedia: Linux Mint 20 "Ulyana" - Release amd64 20200624
IwConfig:
 lo no wireless extensions.

 enp8s0 no wireless extensions.

 eno1 no wireless extensions.
MachineType: Dell Inc. Precision T3600
Package: linux (not installed)
ProcEnviron:
 LANGUAGE=fr_FR
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcFB:
 0 radeondrmfb
 1 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-27-generic root=UUID=be7e25b0-a451-4097-b177-4855317e502b ro quiet splash
ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-5.11.0-27-generic N/A
 linux-backports-modules-5.11.0-27-generic N/A
 linux-firmware 1.187.16
RfKill:

Tags: uma
Uname: Linux 5.11.0-27-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
_MarkForUpload: True
dmi.bios.date: 11/07/2013
dmi.bios.release: 4.6
dmi.bios.vendor: Dell Inc.
dmi.bios.version: E12
dmi.board.name: 08HPGT
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 7
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrE12:bd11/07/2013:br4.6:svnDellInc.:pnPrecisionT3600:pvr01:rvnDellInc.:rn08HPGT:rvrA01:cvnDellInc.:ct7:cvr:
dmi.product.name: Precision T3600
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.

[Chris Guiver (guiverc)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1939071

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1939071

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Chris Chiu (mschiu77)]

It seems pretty similar to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1940113.

Could you test the following kernel to see which version helps?
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.13.12/
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.14-rc3/
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.14-rc7/

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Denis Vergain (zouloup)]

apport information

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Denis Vergain (zouloup)]

Hi Chris,

I have just loaded kernel "Linux 5.11.0-34-generic #36~20.04.1-Ubuntu SMP Fri Aug 27 08:06:32 UTC 2021" through the update manager : Dual screen is now working fine. Status of this bug 1939071 can be changed to "fixed".

Thanks for your help
Thanks to the team
Denis