Public bug reported: I was happily using wayland so far on an Intel Tiger Lake laptop. Then I did an upgrade, including upgrading gdm3 42.0-1ubuntu2 to 42.0-1ubuntu4, rebooted, and got logged into an Xorg session.
Investigating, it seems this was caused by this patch, reverting in manually locally fixes things: https://salsa.debian.org/gnome- team/gdm/-/blob/ubuntu/master/debian/patches/data-Disable-wayland-on- nvidia-if-suspend-is-broken.patch Looking at the patch, it seems that the checks introduced by it are nvidia-specific, but are applied to *all* other cards as well. There used to be an nvidia-only check wrapping these checeks, but that was reverted as part of 42.0-1ubuntu4 here: https://salsa.debian.org/gnome- team/gdm/-/commit/e2f0cca51dd9638c5b2a74a9739539ef4fd427bd I think this is a pretty urgent and issue. I haven't tested on multiple machines, but AFAICS this will be unintentionally be disabling wayland for a lot of people... I can provide more hardware details, but I think the bug will be obvious if you look at the resulting 61-gdm.rules file (here's an excerpt, including some context around the nvidia checks to see they are unguarded): LABEL="gdm_pci_device_end" # disable Wayland if modesetting is disabled KERNEL!="card[0-9]*", GOTO="gdm_nomodeset_end" SUBSYSTEM!="drm", GOTO="gdm_nomodeset_end" IMPORT{parent}="GDM_MACHINE_HAS_VIRTUAL_GPU" ENV{GDM_MACHINE_HAS_VIRTUAL_GPU}!="1", RUN+="/usr/bin/touch /run/udev/gdm-machine-has-hardware-gpu" # but keep it enabled for simple framebuffer drivers DRIVERS=="simple-framebuffer", GOTO="gdm_nomodeset_end" IMPORT{cmdline}="nomodeset", GOTO="gdm_disable_wayland" LABEL="gdm_nomodeset_end" # Check if suspend/resume services necessary for working wayland support is available TEST{0711}!="/usr/bin/nvidia-sleep.sh", GOTO="gdm_disable_wayland" TEST{0711}!="/usr/lib/systemd/system-sleep/nvidia", GOTO="gdm_disable_wayland" 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" IMPORT{program}="/bin/sh -c 'echo NVIDIA_HIBERNATE=`systemctl is-enabled nvidia-hibernate`'" ENV{NVIDIA_HIBERNATE}!="enabled", GOTO="gdm_disable_wayland" IMPORT{program}="/bin/sh -c 'echo NVIDIA_RESUME=`systemctl is-enabled nvidia-resume`'" ENV{NVIDIA_RESUME}!="enabled", GOTO="gdm_disable_wayland" IMPORT{program}="/bin/sh -c 'echo NVIDIA_SUSPEND=`systemctl is-enabled nvidia-suspend`'" ENV{NVIDIA_SUSPEND}!="enabled", GOTO="gdm_disable_wayland" # # Disable wayland when nvidia modeset is disabled or when drivers are a lower # version than 470, # For versions above 470 but lower than 510 prefer Xorg, # Above 510, prefer Wayland. KERNEL!="nvidia_drm", GOTO="gdm_nvidia_drm_end" SUBSYSTEM!="module", GOTO="gdm_nvidia_drm_end" ACTION!="add", GOTO="gdm_nvidia_drm_end" # disable wayland if nvidia-drm modeset is not enabled ATTR{parameters/modeset}!="Y", GOTO="gdm_disable_wayland" # disable wayland for nvidia drivers versions lower than 470 ATTR{version}=="4[0-6][0-9].*|[0-3][0-9][0-9].*|[0-9][0-9].*|[0-9].*", GOTO="gdm_disable_wayland" # For nvidia drivers versions Above 510, keep Wayland by default ATTR{version}=="[5-9][1-9][0-9].*", GOTO="gdm_end" # For nvidia drivers versions 470-495, prefer Xorg by default GOTO="gdm_prefer_xorg" LABEL="gdm_nvidia_drm_end" ** Affects: gdm3 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1969250 Title: gdm disables wayland for all(?) non-nvidia cards since 42.0-1ubuntu4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1969250/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
