https://bugs.freedesktop.org/show_bug.cgi?id=88947

Bug ID: 88947 Summary: "Unknown" display appears with no external display connected Product: DRI Version: DRI git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: General Assignee: dri-devel@lists.freedesktop.org Reporter: ypwong@gmail.com

1. boot to desktop with no external monitor connected 2. Open the "Display" utility, check whether there is an "Unknown" display. You will be able to move the cursor out of your screen, even open an application on the extended display.

Tested with 2015-01-29 drm-intel-nightly.

00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0106] (rev 09) (prog-if 00 [VGA controller]) 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF108M [GeForce GT 630M] [10de:0de9] (rev a1) (prog-if 00 [VGA controller])

Original bug: https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1355562