[Bug 1965563] Re: GNOME apps crash with "Protocol error" in NVIDIA Wayland sessions

Alessandro Astone 1965563 at bugs.launchpad.net
Wed Sep 18 12:13:35 UTC 2024


Both patches come from upstream, egl-wayland-retrieve-DRM-device-name-before-acquiring-.patch originally had to be manually rebased to apply cleanly. but with both patches in this order they both apply cleanly, so i just took both from upstream. 
I realize i forgot to re-apply the debian headers.

> >  * The scope of the change is limited to the NVIDIA proprietary
drivers.

> How can we be sure that this is the case?

This library is exclusively loaded by the userspace libraries of the
proprietary nvidia driver, or by display servers like Mir and Mutter for
supporting nvidia version 470 or lower.

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Title:
  GNOME apps crash with "Protocol error" in NVIDIA Wayland sessions

Status in NVIDIA / egl-wayland:
  Fix Released
Status in GTK+:
  Fix Released
Status in egl-wayland package in Ubuntu:
  Fix Released
Status in egl-wayland source package in Jammy:
  In Progress

Bug description:
  [ Impact ]

   * GTK applications fail to start on a hybrid graphics machine with an
  NVIDIA discrete GPU.

   * The NVIDIA egl-wayland extension 1.1.9 only supports rendering to
  the NVIDIA GPU if it is the primary GPU. On a hybrid system the
  primary GPU would be the integrated graphics, while the NVIDIA GPU
  should only be used for offloading of specific applications. On such a
  setup, the egl-wayland extension still incorrectly advertised the
  driver as compatible and attempted to use the NVIDIA GPU for all EGL
  applications.

   * To fix the issue, backport a commit from a newer version of the
  NVIDIA egl-wayland extension that reports the driver as incompatible
  when the NVIDIA GPU is not the primary GPU. This effectively ensures
  that all EGL applications run on integrated graphics by default.

  [ Test Plan ]

   * Set up a hybrid graphics machine with Jammy 22.04 LTS and the
  proprietary NVIDIA drivers 535 or 550.

   * Install `libnvidia-egl-wayland1` from the update.

   * Log-in to a Wayland desktop session.

   * Verify that you can start `gnome-text-editor`.

  [ Where problems could occur ]

   * The scope of the change is limited to the NVIDIA proprietary
  drivers.

   * A possible regression would be that the driver starts reporting as
  incompatible on NVIDIA single-GPU systems too. One would notice by all
  wayland-native applications suddenly being very slow. Note that such
  systems would not default to Wayland in Jammy.

  [ Original Report ]

  $ dpkg-query -W gnome-shell-extension-prefs
  gnome-shell-extension-prefs	42~beta-1ubuntu3
  $ gnome-extensions-app
  Gdk-Message: 17:54:19.697: Error reading events from display: Protocol error

  Caveat: I currently have a mix of packages from jammy-release and
  jammy-proposed.

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