I tried adding xorg-edgers ppa and upgrade. This made things worse : Logs out immediately after login. So I installed 15.10 that seems to work finer, but with another random display issue : https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1528522
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1528376 Title: Unexpected software rendering for 3D To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1528376/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs