Upgrade from 18.04 to 20.04 deactivates internal monitor in display manager

[David W Craig]

output of lsb_release -rd:
Description: Ubuntu 20.04 LTS
Release: 20.04

I recently upgraded from 18.04 to 20.04 and was using MATE. When the upgrade was run my external
HDMI monitor was plugged in, after the update, when I reboot, the internal monitor shows the beginning of the boot process (I deactivated 'silent splash' by editing grub.cfg) then it switches to the HDMI monitor and the internal monitor goes dark. I can also get the tty consoles on the external monitor but not on the internal monitor.

In MATE it was a real problem because the panel is apparently still on the invisible part of the desktop; I used a tty to install gnome, then I could get the display settings by right-clicking on the desktop, and setting the monitors to mirror, so I can reach applications, etc.

Computer is a Dell Inspiron 3275 AIO with touch screen and Intel on-board video, I think.
I had no problems with Ubuntu 18.04 with MATE.

The problem seems to be similar to this bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874194
but sort of the reverse, in that the internal monitor is the problem.

Thank you for your help.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.4.0-33-generic 5.4.0-33.37
ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
Uname: Linux 5.4.0-33-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: david 2012 F.... pulseaudio
 /dev/snd/controlC1: david 2012 F.... pulseaudio
 /dev/snd/controlC0: david 2012 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Jun 7 11:43:37 2020
HibernationDevice: RESUME=UUID=3b1a8a2e-1937-4785-b4bb-49f9a251b292
InstallationDate: Installed on 2020-03-07 (91 days ago)
InstallationMedia: Ubuntu-MATE 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: Dell Inc. Inspiron 3275 AIO
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-33-generic root=UUID=95b8de7f-9de3-4cea-b947-e135a738948c ro
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-33-generic N/A
 linux-backports-modules-5.4.0-33-generic N/A
 linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2020-06-06 (1 days ago)
dmi.bios.date: 03/15/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.7.0
dmi.board.name: 04NJ6P
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 13
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 00
dmi.modalias: dmi:bvnDellInc.:bvr1.7.0:bd03/15/2019:svnDellInc.:pnInspiron3275AIO:pvr1.7.0:rvnDellInc.:rn04NJ6P:rvrA02:cvnDellInc.:ct13:cvr00:
dmi.product.family: Inspiron
dmi.product.name: Inspiron 3275 AIO
dmi.product.sku: 0855
dmi.product.version: 1.7.0
dmi.sys.vendor: Dell Inc.

[David W Craig (davidwcraigx)]

I also went in the dconf editor and changed some settings for laptop lid behavior to 'nothing",
since the display settings show the internal monitor as a laptop monitor. No effect.

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

This change was made by a bot.

[David W Craig (davidwcraigx)]

If I shutdown and unplug the external HDMI monitor, then power on, the internal display only shows the initial UEFI message, the screen appears grey, then it goes dark. If I then plug in the HDMI (not changing the power state) I can get a tty with ctrl-alt-f1, login, and run startx. MATE then appears, but only the non-panel part of the display. Also the monitor arrangement is flipped, but I think that is a minor MATE problem I noticed in 18.04 after a cli startx.

[David W Craig (davidwcraigx)]

If the external HDMI is plugged in at power-on, a login window will show up on the HDMI, and then I can choose gnome or gnome classic for the session, log in, then right-click on the desktop, set the displays to mirror, and get to the main panels or activities menu.

[David W Craig (davidwcraigx)]

I left the machine on a while, and the internal monitor came on while I was gone for about an hour.
???

[David W Craig (davidwcraigx)]

This seems to be a kernel issue: when I switched back to kernel 4.15 in GRUB2, the problems seems to go away. Checking on it.

[David W Craig (davidwcraigx)]

PARTIAL FIX: downgrade the kernel. I can confirm that everything seems to return to normal if you use GRUB2 to select Linux 4.15.0-101-generic as the kernel.
I edited /etc/default/grub to
- give a boot menu with a reasonable timeout
- use the last selected kernel as default

[David W Craig (davidwcraigx)]

I found a similar Fedora bug report, it is a kernel issue, and there is a workaround. See: https://bugzilla.redhat.com/show_bug.cgi?id=1594488

Need to add 'amdgpu.dc=0' to the kernel command line in grub.cfg:

GRUB_CMDLINE_LINUX="amdgpu.dc=0"
then run grub-update

reboot

after booting to a version 5 kernel, video on both monitors works, and a check of the proc cmdline shows:
$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.4.0-40-generic root=UUID=95b8de7f-9de3-4cea-b947-e135a738948c ro amdgpu.dc=0

[Kai-Heng Feng (kaihengfeng)]

Please test latest mainline kernel without "amdgpu.dc=0":
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8-rc4/

[David W Craig (davidwcraigx)]

I got the files for the kernel and did this (many warnings, one error):

(base) david:new-kernel$ sudo dpkg -i *.deb
Selecting previously unselected package linux-headers-5.8.0-050800.
(Reading database ... 454198 files and directories currently installed.)
Preparing to unpack linux-headers-5.8.0-050800_5.8.0-050800.202007052030_all.deb ...
Unpacking linux-headers-5.8.0-050800 (5.8.0-050800.202007052030) ...
Preparing to unpack linux-headers-5.8.0-050800-generic_5.8.0-050800.202007052030_amd64.deb ...
Unpacking linux-headers-5.8.0-050800-generic (5.8.0-050800.202007052030) over (5.8.0-050800.202007052030) ...
Preparing to unpack linux-image-unsigned-5.8.0-050800-generic_5.8.0-050800.202007052030_amd64.deb ...
Unpacking linux-image-unsigned-5.8.0-050800-generic (5.8.0-050800.202007052030) over (5.8.0-050800.202007052030) ...
Selecting previously unselected package linux-modules-5.8.0-050800-generic.
Preparing to unpack linux-modules-5.8.0-050800-generic_5.8.0-050800.202007052030_amd64.deb ...
Unpacking linux-modules-5.8.0-050800-generic (5.8.0-050800.202007052030) ...
Setting up linux-headers-5.8.0-050800 (5.8.0-050800.202007052030) ...
Setting up linux-headers-5.8.0-050800-generic (5.8.0-050800.202007052030) ...
Setting up linux-modules-5.8.0-050800-generic (5.8.0-050800.202007052030) ...
Setting up linux-image-unsigned-5.8.0-050800-generic (5.8.0-050800.202007052030) ...
Processing triggers for linux-image-unsigned-5.8.0-050800-generic (5.8.0-050800.202007052030) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.8.0-050800-generic
modinfo: ERROR: could not get modinfo from 'da903x': No such file or directory
W: Possible missing firmware /lib/firmware/amdgpu/navi12_gpu_info.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_gpu_info.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_ta.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_asd.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_sos.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_ta.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_asd.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_sos.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi14_ta.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vega20_ta.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_rlc.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_mec2.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/arcturus_mec.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_rlc.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_mec2.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_mec.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_me.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_pfp.bin for module amdgpu
W: Pos...

[David W Craig (davidwcraigx)]

The above did not work.
I edited grub to remove the amdgpu.dc=0 from the command line, ran update-grub and rebooted. Essentially the same behavior as before.
I did notice some 'Tell Plymouth to write out...(something) in the boot messages, but otherwise very similar.

[Kai-Heng Feng (kaihengfeng)]

Thanks for testing.

Did it work on 18.04?

[David W Craig (davidwcraigx)]

Yes, it worked on 18.04. The problem came with the upgrade to 20.04.

[Kai-Heng Feng (kaihengfeng)]

Can you please test kernel v4.15, which is used by 18.04:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.18/

[David W Craig (davidwcraigx)]

I already tried that, it V4.1.5 worked with both Ubuntu 18.04 and 20.04. I
put in an earlier comment about this.

On Wed, Jul 8, 2020 at 10:40 AM Kai-Heng Feng <email address hidden>
wrote:

> Can you please test kernel v4.15, which is used by 18.04:
> https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.18/
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1882442
>
> Title:
> Upgrade from 18.04 to 20.04 deactivates internal monitor in display
> manager
>
> Status in linux package in Ubuntu:
> Incomplete
> Status in linux package in Fedora:
> Unknown
>
> Bug description:
> output of lsb_release -rd:
> Description: Ubuntu 20.04 LTS
> Release: 20.04
>
> I recently upgraded from 18.04 to 20.04 and was using MATE. When the
> upgrade was run my external
> HDMI monitor was plugged in, after the update, when I reboot, the
> internal monitor shows the beginning of the boot process (I deactivated
> 'silent splash' by editing grub.cfg) then it switches to the HDMI monitor
> and the internal monitor goes dark. I can also get the tty consoles on the
> external monitor but not on the internal monitor.
>
> In MATE it was a real problem because the panel is apparently still on
> the invisible part of the desktop; I used a tty to install gnome, then
> I could get the display settings by right-clicking on the desktop, and
> setting the monitors to mirror, so I can reach applications, etc.
>
> Computer is a Dell Inspiron 3275 AIO with touch screen and Intel
> on-board video, I think.
> I had no problems with Ubuntu 18.04 with MATE.
>
> The problem seems to be similar to this bug:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874194
> but sort of the reverse, in that the internal monitor is the problem.
>
> Thank you for your help.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 20.04
> Package: linux-image-5.4.0-33-generic 5.4.0-33.37
> ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
> Uname: Linux 5.4.0-33-generic x86_64
> ApportVersion: 2.20.11-0ubuntu27.2
> Architecture: amd64
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC2: david 2012 F.... pulseaudio
> /dev/snd/controlC1: david 2012 F.... pulseaudio
> /dev/snd/controlC0: david 2012 F.... pulseaudio
> CasperMD5CheckResult: skip
> CurrentDesktop: ubuntu:GNOME
> Date: Sun Jun 7 11:43:37 2020
> HibernationDevice: RESUME=UUID=3b1a8a2e-1937-4785-b4bb-49f9a251b292
> InstallationDate: Installed on 2020-03-07 (91 days ago)
> InstallationMedia: Ubuntu-MATE 16.04.1 LTS "Xenial Xerus" - Release
> amd64 (20160719)
> MachineType: Dell Inc. Inspiron 3275 AIO
> ProcFB: 0 amdgpudrmfb
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-33-generic
> root=UUID=95b8de7f-9de3-4cea-b947-e135a738948c ro
> RelatedPackageVersions:
> linux-restricted-modules-5.4.0-33-generic N/A
> linux-backports-modules-5.4.0-33-generic N/A
> linux-firmware 1.187
> SourcePackage: linux
> UpgradeStatus: Upgraded to focal on 2020-06-06 (1 days ago)
> dmi.bios.date: 03/15/2019...

[Kai-Heng Feng (kaihengfeng)]

Would it be possible for you to do a kernel bisection?

First, find the last -rc kernel works and the first -rc kernel doesn’t work from http://kernel.ubuntu.com/~kernel-ppa/mainline/

Then,
$ sudo apt build-dep linux
$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
$ cd linux
$ git bisect start
$ git bisect good $(the working version you found)
$ git bisect bad $(the non-working version found)
$ make localmodconfig
$ make -j`nproc` deb-pkg
Install the newly built kernel, then reboot with it.
If it still have the same issue,
$ git bisect bad
Otherwise,
$ git bisect good
Repeat to "make -j`nproc` deb-pkg" until you find the offending commit.

[David W Craig (davidwcraigx)]

I will have to read up on this, and I am in a situation where I have to rely on this as my only computer for a while.