@Timo: I could not test this earlier because I was on holidays. So finally here are the results:
1. (If I understand correctly the fix from bug 1836721 is already in bionic-updates) I upgraded all packages, but the bug still persists (error message "xfwm4: ../src/mesa/drivers/dri/i965/intel_mipmap_tree.c:1285: intel_miptree_match_image: Assertion `image->TexObject->Target == mt->target' failed.") 2. So I enabled ppa:ubuntu-x-swat/updates and upgraded all packages, but the error still persists. >From my point of view it seems this bug is not fixed by bug 1836721. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/1835622 Title: Cannot start desktop session with compositor enabled To manage notifications about this bug go to: https://bugs.launchpad.net/xfwm4/+bug/1835622/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp