I've had this issue on my T450s with 15.04 MATE since March. I've also had the issue where the screen is completely black after resume and I need to change screens (Alt-Ctrl-F2, Alt-Ctrl-F7) to get the window manager back. This happens on external screens (Ultradock) and on the built-in screen. I will try UXA to see if that solves things.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1452318 Title: Faulty behavior when resuming from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1452318/+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