[Bug 1652282] Re: Xwayland not using XAUTHORITY, prevents root applications from connecting

[Phillip Susi]

Ubuntu doesn't use mutter by default though ( is that what lubuntu uses?
).  I looked at this again today and for some reason gdm isn't giving
the option to log in with a wayland session.  I switched to lightdm and
it appears to not bother with Xwayland and just runs gnome-shell, and
gnome-shell in turn spawns Xwayland, so *it* needs patched to add
XAUTHORITY too.


** Also affects: gnome-shell (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  Xwayland not using XAUTHORITY, prevents root applications from
  connecting

Status in gdm:
  Expired
Status in GParted:
  Fix Released
Status in Ubuntu GNOME:
  Invalid
Status in gdm3 package in Ubuntu:
  Confirmed
Status in gnome-shell package in Ubuntu:
  New
Status in gparted package in Ubuntu:
  Invalid
Status in mutter package in Ubuntu:
  Confirmed

Bug description:
  When running wayland, GDM fails to set up an XAUTHORITY file and instead
  relies on the process UID for authentication.  This prevents
  applications run as root, like gparted or synaptic from connecting to
  the server.  GDM needs to set up the XAUTHORITY file when running
  Xwayland just like it does when it runs the conventional Xorg.

  A large list of applications broken by this can be found here:

  https://codesearch.debian.net/search?q=Exec%3Dsu-to-
  root+filetype%3Adesktop+path%3A*%2Fapplications%2F*&perpkg=1

  openSUSE handles this issue with this patch (from the changelog, it looks like they implemented this for their YaST settings app):
  https://build.opensuse.org/package/view_file/GNOME:Factory/mutter/mutter-xwayland-create-xauthority.patch?expand=1

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