I see these same symptoms on my macbook air 5,2. I've tried two different (24" and 23") Dell DVI monitors without success. For me, the external monitor usually goes red when I plug it in the second time. Sometimes this hangs the whole machine, sometimes not. In either case the only way to get the external monitor to work again is to reboot.
I've tried the Xorg edgers PPA with no improvement to this problem. I would love to see a fix for this, everything else works so well with the MBA. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1088547/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
