I experience similar problem but with Intel graphic card i915. And mostly when using Google Chrome, LibreOffice or Viber. For example, I clicked Tools -> Options in LibreOffice and I was returned to login screen. Or I was zooming google maps... or when talking to someone on Viber... I believe it has to do something with hardware accelerator or openGL? (I am just an ordinary user so do not take my comments so seriously). I noticed that LibreOffice does not allow to enable Hardware Accelerator from time to time...
When Ubuntu 15.10 was published, this was happening more often. Now, it happenes rarely. But unexpected. -- 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/1513024 Title: Display-server randomly crashing in Ubuntu 15.10 after upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1513024/+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
