Verify that the gdm cherry-picks are wanted for jammy

[Jeremy Bícha]

Earlier this week, I cherry-picked commits from GDM. One of those commits isn't needed because we distro-patched some fixes for Nvidia hybrid graphics in Ubuntu 22.04.

The GDM commit disabled Wayland in that situation but since Wayland works, we don't want to disable it.

[Daniel van Vugt (vanvugt)]

This bug probably needs more details. If you're referring to disabling Wayland GDM for some GPUs then:

 VMs: yes
 GPUless server chips: yes
 Nvidia: no
 Hybrid: no (because bug 1964037 / bug 1959888 fixes those)

[Jeremy Bícha (jbicha)]

Yes, details were minimal because I just wanted to get a block-proposed bug in so we could discuss more.

Initial thinking is that we should remove the 440d6f9ecc151fbcf8c852d500c5cc5add168b94 patch.

[Jack Howarth (jwhowarth)]

gdm3 42.0-1ubuntu3 blocks use of wayland on a X570 UD v1.1 motherboard with an AMD 5600X and Nvidia 1050 graphics card.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

See also bug 1968929.

[Jack Howarth (jwhowarth)]

gdm3 42.0-1ubuntu4 still blocks use of wayland on a X570 UD v1.1 motherboard with an AMD 5600X and Nvidia 1050 graphics card. https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1969198

[Marcos Alano (mhalano)]

I got the gdm3 package version 42.0-1ubuntu4 and still don't get Wayland. I troubleshot and found the problem in the file /lib/udev/rules.d/61-gdm.rules in the following lines:
IMPORT{program}="/bin/sh -c \"sed -e 's/: /=/g' -e 's/\([^[:upper:]]\)\([[:upper:]]\)/\1_\2/g' -e 's/[[:lower:]]/\U&/g' -e 's/^/NVIDIA_/' /proc/driver/nvidia/params\""
ENV{NVIDIA_PRESERVE_VIDEO_MEMORY_ALLOCATIONS}!="1", GOTO="gdm_disable_wayland"
If I comment that Wayland appears as an option in GDM.
I had to create a file /etc/modprobe.d/nvidia-hack.conf with the follow content:
options nvidia NVreg_PreserveVideoMemoryAllocations=1
This theoretically enable the option to preserve video memory allocations, but still getting the option as "1", still don't enable Wayland.

[Marcos Alano (mhalano)]

The result of command showing the preserve option enabled in my system

[Marcos Alano (mhalano)]

The command executed right in the shell showing the necessary option as "1"

[Launchpad Janitor (janitor)]

This bug was fixed in the package gdm3 - 42.0-1ubuntu4

---------------
gdm3 (42.0-1ubuntu4) jammy; urgency=medium

  * Drop patch disabling Wayland on hybrid laptops using Nvidia's drivers.
    It's not needed for Ubuntu 22.04 LTS (LP: #1968809)

 -- Jeremy Bicha <email address hidden> Thu, 14 Apr 2022 14:29:35 -0400

[Jeremy Bícha (jbicha)]

Marcos, that is intended behavior.

https://salsa.debian.org/gnome-team/gdm/-/blob/ubuntu/master/debian/patches/data-Disable-wayland-on-nvidia-if-suspend-is-broken.patch

I believe Canonical is going to work on getting suspend working for the Nvidia drivers as required by GNOME for Wayland support. That will be a future stable release update for 22.04 LTS.

You'll need to open a new bug if you need to discuss this further since we don't really follow closed bugs.

[Marcos Alano (mhalano)]

I put all the information in my original bug report and I will unmark as duplicate. https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1968929

[Kevin Keijzer (kkeijzer)]

For me, gdm3 42.0-1ubuntu4 breaks Wayland entirely. There is no option to select a session left when logging in, and when I enter my password and press enter I'm left in an X11 session.

I only have machines with Intel graphics.

Reverting to 42.0-1ubuntu2 makes it work normally again (defaults to Wayland, with an option to select "Ubuntu on Xorg").

[Marcos Alano (mhalano)]

Kevin,

You can use the bug report I opened since this one is closed: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1968929
Also, I would like you to comment that about if 42.0-1ubuntu3 version has the problem