I reinstalled Raring from a daily build in the hope that might fix things. It didn't: booting still usually, but not always, fails. To recap what I've said above, when I boot one of three things typically happens:
1. I'm left looking at a black screen with a mouse cursor on virtual terminal 7. No process has crashed. 2. The X server crashes, and the log file shows "no devices found"/"no screens found" errors. 3. The boot succeeds. I compared the X server log in case 1 with the log after a successful boot and saw an interesting difference. In case 1, the log contains this: [ 7.479] (II) intel(0): SNA initialized with no backend [ 7.479] (==) intel(0): Backing store disabled [ 7.479] (==) intel(0): Silken mouse enabled [ 7.479] (II) intel(0): HW Cursor enabled [ 7.479] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message. [ 7.479] (==) intel(0): DPMS enabled [ 7.480] (WW) intel(0): Textured video not supported on this hardware For a successful boot, the corresponding lines look like this: [ 7.404] (II) intel(0): SNA initialized with IvyBridge backend [ 7.404] (==) intel(0): Backing store disabled [ 7.405] (==) intel(0): Silken mouse enabled [ 7.405] (II) intel(0): HW Cursor enabled [ 7.405] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message. [ 7.405] (==) intel(0): DPMS enabled -- 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/1161371 Title: X server sometimes fails to start on MacBook Air 5,2: no screens found Status in Unity: New Status in “xserver-xorg-video-intel” package in Ubuntu: New Bug description: I'm running Ubuntu 13.04 (Raring) on a MacBook Air 5,2. The machine has an Intel HD Graphics 4000 (Ivybridge Mobile) graphics chip. I have xserver-xorg-core version 2:1.13.3-0ubuntu4. On approximately every other boot, the X server fails to start and I'm left in an unusuable low-graphics mode. When this happens, the X log contains these error lines: (EE) No devices detected. ... Fatal server error: ... no screens found --- ApportVersion: 2.9.2-0ubuntu5 Architecture: amd64 CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' DistUpgraded: Fresh install DistroCodename: raring DistroRelease: Ubuntu 13.04 DistroVariant: ubuntu DkmsStatus: virtualbox, 4.2.8, 3.8.0-15-generic, x86_64: installed ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Apple Inc. Device [106b:00fe] InstallationDate: Installed on 2013-03-22 (9 days ago) InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64+mac (20130321) MachineType: Apple Inc. MacBookAir5,2 MarkForUpload: True Package: xserver-xorg-video-intel 2:2.21.5-0ubuntu1 PackageArchitecture: amd64 ProcEnviron: TERM=linux PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-15-generic root=UUID=a4137b11-1807-4361-ad69-eaccead7f5e7 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.8.0-15.25-generic 3.8.4 Tags: raring ubuntu Uname: Linux 3.8.0-15-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 11/27/2012 dmi.bios.vendor: Apple Inc. dmi.bios.version: MBA51.88Z.00EF.B02.1211271028 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-2E6FAB96566FE58C dmi.board.vendor: Apple Inc. dmi.board.version: MacBookAir5,2 dmi.chassis.type: 10 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-2E6FAB96566FE58C dmi.modalias: dmi:bvnAppleInc.:bvrMBA51.88Z.00EF.B02.1211271028:bd11/27/2012:svnAppleInc.:pnMacBookAir5,2:pvr1.0:rvnAppleInc.:rnMac-2E6FAB96566FE58C:rvrMacBookAir5,2:cvnAppleInc.:ct10:cvrMac-2E6FAB96566FE58C: dmi.product.name: MacBookAir5,2 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. version.compiz: compiz 1:0.9.9~daily13.03.29-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.43-0ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.3-0ubuntu1 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.3-0ubuntu1 version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu4 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 2:2.21.5-0ubuntu1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1 xserver.bootTime: Sun Mar 31 18:47:38 2013 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.version: 2:1.13.3-0ubuntu4 xserver.video_driver: intel To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1161371/+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
