Having similar problem with kernel 3.19.0-32.37 and i915_bpo module - when docked and external (displayport) screen attached, X finds no screens with a usable configuration.
When the external screen is off or disconnected, startup works normally into single (laptop) screen config; when undocked and using on-board displayport connector dualscreen also works normally. I have the same errors in dmesg, which did not occur on kernel 3.16.0-38.52. I've currently reverted back to that kernel as workaround. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520040 Title: [drm:gen8_irq_handler [i915_bpo]] *ERROR* The master control interrupt lied (SDE)! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1520040/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
