Looking at /usr/lib/udev/rules.d/61-gdm.rules
The conditions that cause Wayland to be rejected as an option seem to
be:
# disable Wayland if modesetting is disabled
IMPORT{cmdline}="nomodeset", GOTO="gdm_disable_wayland
# 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"
So, looking at those conditions:
Modesetting:
$ inxi -Gxx
Graphics:
Device-1: NVIDIA GK107 [GeForce GT 640] vendor: eVga.com. driver:
nvidia
v: 470.182.03 pcie: speed: 2.5 GT/s lanes: 16 bus-ID: 01:00.0
chip-ID: 10de:0fc1
Display: x11 server: X.Org v: 1.21.1.4 compositor: gnome-shell v: 42.5
driver: X: loaded: nvidia unloaded: fbdev,modesetting,nouveau,vesa
gpu: nvidia display-ID: :1 screens: 1
Screen-1: 0 s-res: 1920x1080 s-dpi: 101
Monitor-1: HDMI-0 res: 1920x1080 dpi: 102 diag: 546mm (21.5")
OpenGL: renderer: NVIDIA GeForce GT 640/PCIe/SSE2
v: 4.6.0 NVIDIA 470.182.03 direct render: Yes
$ grep modesetting /var/log/Xorg.0.log
[155004.672] (==) Matched modesetting as autoconfigured driver 2
[155004.802] (II) LoadModule: "modesetting"
[155004.802] (II) Loading
/usr/lib/xorg/modules/drivers/modesetting_drv.so
[155004.834] (II) Module modesetting: vendor="X.Org Foundation"
[155004.884] (II) modesetting: Driver for Modesetting Kernel Drivers:
kms
[155004.901] (WW) Falling back to old probe method for modesetting
[155005.857] (II) UnloadModule: "modesetting"
[155005.857] (II) Unloading modesetting
Does that mean modesetting failed to start? And if so, why?
NVidia DRM:
$ grep nvidia-drm /var/log/syslog
May 14 00:45:51 Nagle-LTS kernel: [ 24.035970] [drm] [nvidia-drm]
[GPU ID 0x00000100] Loading driver
May 14 00:45:51 Nagle-LTS kernel: [ 24.035973] [drm] Initialized
nvidia-drm 0.0.0 20160202 for 0000:01:00.0 on minor 0
So nvidia-drm seems to be loaded.
NVidia driver:
NVidia driver version 470.182.03 is not lower than 470.
That regular expression should not match.
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https://bugs.launchpad.net/bugs/2020249
Title:
Missing Wayland login option on NVIDIA systems - still broken
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