I need to recall that on QEMU/KVM (while using virt-manager the crashes
occur with Cirrus, QXL, VGA video drivers, but does not occur with VMVGA
video driver) and VirtualBox (tested all versions with default
`vboxvideo` driver) the crash is caused by `gstreamer-vaapi` package
(see https://packages.ubuntu.com/focal/gstreamer1.0-vaapi). It is a
dependency of `ubuntu-restricted-addons` (see
https://packages.ubuntu.com/focal/ubuntu-restricted-addons).
So ubuntu-mate-welcome and for example Cheese with Yelp may be fixed by
removing this package with
```
sudo apt-get purge gstreamer1.0-vaapi
sudo apt-get autoremove --purge # to remove libgstreamer-plugins-bad1.0-0 (is
not a problem)
```
So please carefully analyze the crash dumps for errors in
`gstreamer1.0-vaapi` and fix this package.
I'm not sure about the bug inside `xorg-server` codebase.
** Also affects: gstreamer-vaapi (Ubuntu)
Importance: Undecided
Status: New
** Tags removed: single-occurrence third-party-packages
** Tags added: eoan
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https://bugs.launchpad.net/bugs/1745345
Title:
Xorg assert failure: Xorg: /usr/include/xorg/privates.h:122:
dixGetPrivateAddr: Assertion `key->initialized' failed.
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