I have that message with a HP EliteBook 850 G2 and docking station under kernel 3.19.0-49-generic on Xubuntu 14.04. I think it causes an issue with unrecognised external monitor. I have attached the syslog while reproducing via following steps:
0. directly after boot: external display is not recognised even it's connected to connected docking station (USB works fine) 1. disconnect docking station (line 1) 1. connect docking station (line 7) 2. activate external display (line 788) 3. deactivate external display (1407) 4. external display is not recognised again (USB works fine) Maybe this is helpfull for fixing. ** Attachment added: "dock.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1488719/+attachment/4569187/+files/dock.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1488719 Title: dmesg shows "[drm:gen8_irq_handler [i915]] *ERROR* The master control interrupt lied (SDE)!" To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1488719/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
