We had this same problem on ~100 PCs, all these computers had Ati Radeon X1200 graphic card and stopped working (Compiz Crash) on mid/later 2018.
To solve this issue we had to downgrade four mesa packages to a prior version: libegl1-mesa:amd64 libgl1-mesa-dri:amd64 libwayland-egl1-mesa:amd64 mesa-vdpau-drivers:amd64 >From version "18.0.5-0ubuntu0" to version "11.2.0-1ubuntu2". In order to to this downgrade we did it this way (in case someone is interested on the how to): apt-get install libegl1-mesa=11.2.0-1ubuntu2 libgl1-mesa- dri=11.2.0-1ubuntu2 libwayland-egl1-mesa=11.2.0-1ubuntu2 mesa-vdpau- drivers=11.2.0-1ubuntu2 -y --allow-downgrades And we had them "hold" so the packages won't be updated on the future unless we do it manually: apt-mark hold libegl1-mesa apt-mark hold libgl1-mesa-dri apt-mark hold libwayland-egl1-mesa apt-mark hold mesa-vdpau-drivers We are interested on an official release that repair this issue, if we can help debug this problem feel free to contact me. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1796457 Title: Compiz Crashed with SIGSEGV [Radeon] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1796457/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs