Ahhh, given what you just mentioned, I remembered that I had added a line to /etc/lightdm/lightdm.conf, in order to force light-dm to use the native resoltution of the display:
display-setup-script=xrandr --output HDMI2 --primary --mode 1440x900 This was returning a failure code, causing light-dm to terminate. The reason for this, in turn, appears to be that the native resolution is no longer being detected at all! Upon lgging into my graphical session I was greeted by a bad resulution and a very long error dialog box, spanning multiple screens (text attached). I am unable to select the native resolution, which leaves me with cropped display output. I guess this means that the original issue was effectively my fault, although it stems from the underlying issue that the supported modes are no longer being detected correctly. Of course it is still possible that this is due to bad EDID info from the display, but the fact remains that the older kernel is able to drive the display at its native resolution. (The reason the log was missing from my uploads was presumably because I didn't think apport needed to run as root. As it turns out, the light-dm logs are only readable by root. Apport didn't warn me / complain about this, so I assumed everyting was fine.) ** Attachment added: "ModeErrorDialog.txt" https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1173491/+attachment/3658734/+files/ModeErrorDialog.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1173491 Title: Boot to "Safe Graphics" after upgrade to Raring Status in “xserver-xorg-video-intel” package in Ubuntu: Incomplete Bug description: Graphics worked in Precise. After upgrading, lightdm does not load, but the "safe graphics mode" dialog is displayed, instead This dialog fails to accomplish anything other than allowing me to exit to a terminal and I thus cannot use the system in graphical mode at all (even "safe graphics"). Booting an older pre-upgrade kernel still works (hence the odd kernel version collected by apport). The display (a TV) is connected via HDMI to the integrated intel graphics adapter. May be related to potentially dodgy EDID information from the display (even in Precise, the selected default resolution is not the native resolution of the display and I have to manually adjust it). ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: xorg 1:7.7+1ubuntu4 ProcVersionSignature: Ubuntu 3.7.0-5.13-generic 3.7.0-rc8 Uname: Linux 3.7.0-5-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.9.2-0ubuntu8 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 CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDmesg: Date: Sat Apr 27 14:53:20 2013 DistUpgraded: 2013-04-26 17:47:28,463 DEBUG enabling apt cron job DistroCodename: raring DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0162] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. Device [1462:2111] InstallationDate: Installed on 2012-07-14 (287 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: MSI MS-7758 MarkForUpload: True ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.7.0-5-generic root=UUID=4cb92e57-8f73-4490-8da4-2b6c1369e72d ro quiet splash vt.handoff=7 SourcePackage: xorg UpgradeStatus: Upgraded to raring on 2013-04-26 (0 days ago) dmi.bios.date: 02/20/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V2.1 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z77A-G43 (MS-7758) dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.1:bd02/20/2012:svnMSI:pnMS-7758:pvr1.0:rvnMSI:rnZ77A-G43(MS-7758):rvr1.0:cvnMSI:ct3:cvr1.0: dmi.product.name: MS-7758 dmi.product.version: 1.0 dmi.sys.vendor: MSI version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1 version.ia32-libs: ia32-libs 20090808ubuntu36 version.libdrm2: libdrm2 2.4.43-0ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.1-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.1-0ubuntu3 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 xserver.bootTime: Sat Apr 27 14:40:11 2013 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.13.3-0ubuntu6 xserver.video_driver: intel --- ApportVersion: 2.9.2-0ubuntu8 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] CurrentDmesg: [ 18.317458] init: plymouth-ready (started) main process (882) terminated with status 1 DistUpgraded: 2013-04-26 17:47:28,463 DEBUG enabling apt cron job DistroCodename: raring DistroRelease: Ubuntu 13.04 DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0162] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. Device [1462:2111] InstallationDate: Installed on 2012-07-14 (289 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: MSI MS-7758 MarkForUpload: True Package: xserver-xorg-video-intel 2:2.21.6-0ubuntu4 PackageArchitecture: amd64 ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=4cb92e57-8f73-4490-8da4-2b6c1369e72d ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8 Tags: raring ubuntu Uname: Linux 3.8.0-19-generic x86_64 UpgradeStatus: Upgraded to raring on 2013-04-26 (2 days ago) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 02/20/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: V2.1 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z77A-G43 (MS-7758) dmi.board.vendor: MSI dmi.board.version: 1.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: MSI dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.1:bd02/20/2012:svnMSI:pnMS-7758:pvr1.0:rvnMSI:rnZ77A-G43(MS-7758):rvr1.0:cvnMSI:ct3:cvr1.0: dmi.product.name: MS-7758 dmi.product.version: 1.0 dmi.sys.vendor: MSI version.compiz: compiz 1:0.9.9~daily13.04.18.1~13.04-0ubuntu1 version.ia32-libs: ia32-libs 20090808ubuntu36 version.libdrm2: libdrm2 2.4.43-0ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.1.1-0ubuntu3 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.1.1-0ubuntu3 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 xserver.bootTime: Mon Apr 29 16:49:15 2013 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.13.3-0ubuntu6 xserver.video_driver: intel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1173491/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
