Public bug reported: On a Dell Sputnik (XPS13, second generation), an accidental upgrade to 13.04 caused my DisplayPort external monitor to stop working. This is an Intel i915 adapter. Rebooting and re-plugging the display in various combinations hasn't helped; and neither does "detect displays" in gnome- control-center. Xrandr shows the external display as unconnected, and doesn't recognize any external modes for it. I think this could be related to #1165965. I've attached my xorg log; nothing immediately obvious stands out, except that it thinks DP1 is disconnected.
$ lsb_release -rd Description: Ubuntu 13.04 Release: 13.04 $ xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767 eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 294mm x 165mm 1920x1080 60.0*+ 59.9 40.0 1680x1050 60.0 59.9 1600x1024 60.2 1400x1050 60.0 1280x1024 60.0 1440x900 59.9 1280x960 60.0 1360x768 59.8 60.0 1152x864 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) DP1 disconnected (normal left inverted right x axis y axis $ xrandr --output DP1 --mode 2560x1440_60.00 --right-of eDP1 xrandr: cannot find mode 2560x1440_60.00 $ sudo lspci -v | grep -C 11 Graphics 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller]) Subsystem: Dell Device 058b Flags: bus master, fast devsel, latency 0, IRQ 42 Memory at d0000000 (64-bit, non-prefetchable) [size=4M] Memory at c0000000 (64-bit, prefetchable) [size=256M] I/O ports at 2000 [size=64] Expansion ROM at <unassigned> [disabled] Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [d0] Power Management version 2 Capabilities: [a4] PCI Advanced Features Kernel driver in use: i915 $ lsmod | grep i9 i915 600396 2 i2c_algo_bit 13413 1 i915 drm_kms_helper 49394 1 i915 drm 286028 3 i915,drm_kms_helper video 19390 1 i915 ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: xorg 1:7.7+1ubuntu4 ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2 Uname: Linux 3.8.0-26-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.9.2-0ubuntu8.1 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: None Date: Tue Jul 23 12:25:40 2013 DistUpgraded: 2013-05-17 09:01:01,450 DEBUG enabling apt cron job DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-precise-amd64-20120703-2 DistroCodename: raring DistroVariant: ubuntu DkmsStatus: virtualbox, 4.2.10, 3.5.0-26-generic, x86_64: installed virtualbox, 4.2.10, 3.8.0-21-generic, x86_64: installed virtualbox, 4.2.10, 3.8.0-26-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:058b] InstallationDate: Installed on 2013-03-11 (133 days ago) InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20120703-15:08 MachineType: Dell Inc. Dell System XPS L322X MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-26-generic root=UUID=458491a3-929d-4075-bf70-89ce47edb4ee ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to raring on 2013-05-17 (67 days ago) dmi.bios.date: 01/22/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A07 dmi.board.name: 0PJHXN dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA07:bd01/22/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0PJHXN:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: Dell System XPS L322X dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.9~daily13.06.19~13.04-0ubuntu1 version.ia32-libs: ia32-libs 20090808ubuntu36 version.libdrm2: libdrm2 2.4.43-0ubuntu1.1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.3-0ubuntu0.3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.3-0ubuntu0.3 version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu6 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.6-0ubuntu4 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug raring ubuntu ** Attachment added: "Xorg.0.log" https://bugs.launchpad.net/bugs/1204246/+attachment/3746830/+files/Xorg.0.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1204246 Title: External display nonfunctional To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1204246/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs