Yes, I can also confirm this problem with a Lenovo Thinkpad T460s (using a docking station as well as without one). I am also using the Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2) (0x1916) GPU running on the i915_bpo driver.
Interestingly enough, when I use the docking station and connect the external screen via DVI it works as long as I don't change the resolution of one of the screens. As soon as the resolution changes the laptop completely freezes (no access to the virtual consoles via pressing ctrl+alt+f1-8). However, although the external screen works most of the times I still sometimes experience freezes after I log-out and log-in again. Unfortunately, I cannot explain why or when this happens. -- 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/xorg/+bug/1559308/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
