Ok, thanks! However there was nothing in my /var/crash folder. Nonetheless I tried to file a new bug with ubuntu-bug xorg. It added lots of system information and logs.
here it is: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1754296 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1754177 Title: [bionic] xserver / startx crashes with Composite Disabled in xorg.conf To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1754177/+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
