"121" implies it's not something you own, and wasn't from an actual login. Maybe it's from the login screen itself. Regardless, you can fix that with:
sudo chown $USER /var/crash/_usr_lib_xorg_Xorg.121.crash or sudo ubuntu-bug /var/crash/_usr_lib_xorg_Xorg.121.crash -- 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/1905555 Title: Xserver crash at start , black screen , 20.04 , Intel HD620 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1905555/+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