Thanks for the bug report. The most likely explanation for this is PSR (panel self refresh) not working. Please try disabling it by adding this kernel parameter: i915.enable_psr=0
You can do so by editing /etc/default/grub and setting: GRUB_CMDLINE_LINUX="i915.enable_psr=0" Then run: sudo update-grub and reboot. ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Incomplete -- 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/2115401 Title: half the screen is flickering To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/2115401/+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