A new xorg version has been installed yesterday 14.02.2018. I could make a video of the problem on my screen before that installation, and have joined it. The bug as posted is still active with the new version. It is not easy to reproduce. Sometimes it comes often, sometimes not. Open and close several windows, switch between tasks..., or verify source code. So long I remember, this bug appeared before september 2017. No problem in year 2016. On the video one can see that abnormal blinking stops on next going into sleep state.
** Attachment added: "Bug 1739322.mp4" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1739322/+attachment/5055814/+files/Bug%201739322.mp4 -- 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/1739322 Title: Hazardous displays when coming back from sleep state To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1739322/+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
