[Bug 88947] "Unknown" display appears with no external display connected

[bugzilla-daemon at freedesktop.org]

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 at lists.freedesktop.org
          Reporter: ypwong at 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

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