Thanks Steve.
Your log file confirms it is this bug:
May 27 11:37:42 lurcher /usr/lib/gdm3/gdm-x-session[2452]: Xorg: ../../../../../../include/privates.h:121: dixGetPrivateAddr: Assertion `key->initialized' failed.
And the workaround of removing gstreamer1.0-vaapi was also discussed in bug 1796437 and bug 1745345. But the fact that any package can crash Xorg is still a Xorg bug, not a bug in that other package.
Thanks Steve.
Your log file confirms it is this bug:
May 27 11:37:42 lurcher /usr/lib/ gdm3/gdm- x-session[ 2452]: Xorg: ../../. ./../.. /../include/ privates. h:121: dixGetPrivateAddr: Assertion `key->initialized' failed.
And the workaround of removing gstreamer1.0-vaapi was also discussed in bug 1796437 and bug 1745345. But the fact that any package can crash Xorg is still a Xorg bug, not a bug in that other package.