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

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

[bugzilla-daemon]

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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

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

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

Chris Wilson <chris@chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|General                     |Driver/nouveau
            Version|DRI git                     |unspecified
           Assignee|dri-devel@lists.freedesktop |nouveau@lists.freedesktop.o
                   |.org                        |rg
            Product|DRI                         |xorg
         QA Contact|                            |xorg-team@lists.x.org

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

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

Chris Wilson <chris-Y6uKTt2uX1cEflXRtASbqLVCufUGDwFn@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|General                     |Driver/nouveau
            Version|DRI git                     |unspecified
           Assignee|dri-devel-PD4FTy7X32lNgt0PjOBp93gSJqDPrsil@public.gmane.org |nouveau-PD4FTy7X32lNgt0PjOBp93rCq3LdnpKM@public.gmane.org
                   |.org                        |rg
            Product|DRI                         |xorg
         QA Contact|                            |xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org

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

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

--- Comment #1 from Alex Deucher <alexdeucher-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> ---
I'm guessing this is a muxed hybrid laptop?  We hit a similar issue in radeon. 
Basically the desktop environment doesn't understand muxed displays so it
reports the status of both GPUs.  Arguably vgaswitcheroo needs to be augmented
to properly report the mux information so userspace can do the right thing with
respect to muxed laptops, but a short term fix would be to just report
disconnected on whatever GPU is not currently selected via the mux.

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

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

Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #2 from Martin Peres <martin.peres-GANU6spQydw@public.gmane.org> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance:
https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/169.

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