Running 4.4.0-22.38 on a Thinkpad T460s, I'm now able to attach an external monitor via HDMI without the machine freezing in the manner described by others. However, I can still make it freeze if I enable (in System Settings > Brightness & Lock) 'Turn screen off when inactive for:' and let the screen turn itself off via the timeout specified. When I awaken the screen by, say, moving the mouse, I find two things have happened:
1. The launcher has reverted its placement to the built-in display (I had changed in in 'Displays' to live on the external display.*** 2. The system will lockup hard if I move the mouse between displays. *** This also happens when I first attach the external display; my preference for launcher placement is not being remembered, unlike my resolution settings, which are. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1559308 Title: Plugging HDMI screen in causes system hang To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1559308/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
