You seem to be using the 'oibaf' PPA which is unsupported and is known to cause such problems.
Please remove that PPA from your system, retest, and if the problem continues then open a new bug. ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1903009 Title: intel graphic card is hanging on login screen , To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1903009/+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