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The gear for choosing X11 / Wayland on login screen is absent. X11 starts silently.

Made a new user and the gear was present for the new user (only for him). After reboot again silently starts X11 and no option to choose. For old and new user.

~$ grep -i WaylandEnable /etc/gdm3/custom.conf
WaylandEnable=true

What's wrong with this system?

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  • Just to be clear, the login screen shows up but the gear is missing from the login screen or does it bypass the login and automatically login after boot? Also, what version of Ubuntu are you using?
    – mchid
    Commented Apr 15, 2022 at 16:13
  • Hello. You are telling us about the DE but not about the version of Ubuntu being used.
    – David
    Commented Apr 15, 2022 at 16:13
  • Also what hardware(video card) does your machine have? Nvidia hardware will typically suppress the Wayland option these days (any current release). Some older releases did allow for Wayland by switching off Nvidia and using Intel, but that feature got dropped.
    – ubfan1
    Commented Apr 15, 2022 at 16:20
  • Just upgraded 21.04 -> 21.10 -> 22.04 RC. Dunno, if it was the same for older versions.
    – Ezh
    Commented Apr 15, 2022 at 16:29
  • Login screen shows up, all is fine. Besides the gear for choosing session does not appears.
    – Ezh
    Commented Apr 15, 2022 at 16:31

2 Answers 2

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The same thing is happening to me after a recent update to 22.04. Wayland worked fine until yesterday. I submitted a bug report about it: https://bugs.launchpad.net/ubuntu/+source/gnome-session/+bug/1969254

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Two possible solutions:

  1. Enable unreleased updates [ Alberto Milone ]

    • Default to Wayland for hybrid systems with Nvidia graphics drivers.
    • Default to Xorg but offer Wayland with the gear button on the login screen for non-hybrid systems with Nvidia graphics drivers. (LP: #1968929)
  2. Workaround Create a file in /etc/modprobe.d/nvidia-power-management.conf containing the text:

    options nvidia NVreg_PreserveVideoMemoryAllocations=1
    

Otherwise, follow these bug reports:

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  • fixed by updates
    – Rovano
    Commented Apr 27, 2022 at 6:29

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