Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xorg (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1088547
Title:
External display is black after hot plug switching to it on Macbook
Air 4,2
Status in “xorg” package in Ubuntu:
Confirmed
Bug description:
I have a Macbook Air 4,2 which I use with an Apple Cinema display. In
a dual display set-up, everything works as expected. If I disable the
laptop display, the external display continues to work (expected
behavior). If I then unplug the external display, the laptop display
is automatically re-enabled and works as expected. The problem is, if
I then plug the external display back in, both displays go black. I
expect the laptop display to go black (disabled), because that was the
last setting. However, I do not expect the external monitor to be
black.
In this state, if I reboot without the external display plugged in,
the laptop display turns on and works as expected. However, if I then
plug in the external display, both displays go black. If I re-boot
and have the external display plugged in, I see the welcome screen but
after logging in, the laptop display is black and the external display
is blank, but with a blue hue.
To recreate:
1. Install Ubuntu on a Macbook Air 4,2
2. Plug in an external monitor
3. In the display settings, enable the external monitor, and disable the
laptop monitor
4. Unplug the external display
5. Plug the external display back in
I have had this problem with the last few Ubuntu releases. Prior to
that, there were more serious problems with dual displays so I did not
test for this problem.
I am not certain this is an xorg bug, that is just where the bug
reporting questionnaire pointed me.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
Uname: Linux 3.5.0-19-generic x86_64
NonfreeKernelModules: wl
.tmp.unity.support.test.0:
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
CompizPlugins:
[core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
Date: Mon Dec 10 10:58:43 2012
DistUpgraded: 2012-10-31 15:21:49,882 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Intel Corporation 2nd Generation Core Processor Family Integrated Graphics
Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
Subsystem: Apple Inc. Device [106b:00eb]
InstallationDate: Installed on 2012-08-17 (114 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
MachineType: Apple Inc. MacBookAir4,2
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-19-generic
root=UUID=87ff7c21-1540-4355-8ae1-6871bdd5f733 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to quantal on 2012-10-31 (39 days ago)
dmi.bios.date: 01/24/2012
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA41.88Z.0077.B0F.1201241549
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-742912EFDBEE19B3
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir4,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-742912EFDBEE19B3
dmi.modalias:
dmi:bvnAppleInc.:bvrMBA41.88Z.0077.B0F.1201241549:bd01/24/2012:svnAppleInc.:pnMacBookAir4,2:pvr1.0:rvnAppleInc.:rnMac-742912EFDBEE19B3:rvrMacBookAir4,2:cvnAppleInc.:ct10:cvrMac-742912EFDBEE19B3:
dmi.product.name: MacBookAir4,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
version.compiz: compiz 1:0.9.8.4+bzr3412-0ubuntu0.1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:1.0.2-0ubuntu3
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