On 12-09-17 05:38 PM, Jason Apol wrote:
> Matt - How does one "recover from the crash by switching to VT1"?
>
> I'd be happy if I can get to some kind of desktop and save my work.
Ctrl-Alt-F1 will take you to a "Virtual Terminal" -- it's a console 
screen where you can log in just as you would at the gnome-terminal 
prompt.  Then you issue those commands, and switch back to the running X 
session, which is running on VT7, with Ctrl-Alt-F7.  you cna switch 
between the 6 built-in VT's with F1-F6; f7 is the default X session; F8 
seems to echo system log messages unless you log in a second user, with 
'Swtitch User', at which point a new X session will start on that screen.

Does that help?

ps -- My success rate is not that high -- at best I usually end up with 
a barely-functional x system, try to save as much work as I can, then 
restart X with 'sudo restart lightdm', which destroys my X session but 
also resets whatever that display bug is.  At worst the resultant 
session is just as nonresponsive as the original crashed one.

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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/966744

Title:
  [i965] Resume from suspend leaves me with black screen or a screen of
  the desktop before it suspended. Compiz hung in
  intel_update_renderbuffers() from intel_prepare_render() from
  brw_draw_prims()

Status in Compiz:
  Confirmed
Status in The Linux Kernel:
  Incomplete
Status in OEM Priority Project:
  New
Status in OEM Priority Project precise series:
  New
Status in X.org xf86-video-intel:
  Confirmed
Status in “compiz” package in Ubuntu:
  Invalid
Status in “xserver-xorg-video-intel” package in Ubuntu:
  Confirmed
Status in “compiz” source package in Precise:
  Invalid
Status in “xserver-xorg-video-intel” source package in Precise:
  Confirmed
Status in “compiz” source package in Quantal:
  Invalid
Status in “xserver-xorg-video-intel” source package in Quantal:
  Confirmed

Bug description:
  This happens intermittently. Sometimes upon resume, all I see is a
  black screen and the cursor. the mouse and keyboard respond (the mouse
  moves) but nothing changes.  Switching to console and back doesn't fix
  it. Killing Compiz also does not fix the issue. Further, if one has
  password lock disabled on resume the user will be stuck with a frozen
  display of whatever was last shown on the screen before suspend. The
  mouse cursor still changes as you hover over various elements but the
  display is frozen solid. One can switch to another TTY via ctrl+alt+F1
  but killing the X session is the only way to get back to the desktop.

  Attempts to replace compiz have been fruitless. Trying the 3.4 kernel
  also did not fix the issue.

  BTW, I haven nothing connected to the laptop when I resume and before
  suspend.  This is a very annoying issue because the only way to
  recover is to reboot, which means all the open files will be lost.

  [UPDATE]
  It was discovered that switching to a tty, killing compiz, then invoking 
'metacity --replace' would successfully switch over to metacity. Attempting to 
invoke 'compiz --replace' afterwards would put the state right back where it 
was (frozen screen, etc.) and output error messages saying something similar to 
"invalid configuration, this should never happen, you should probably raise a 
bug report about it". After killing Compiz again and invoking compiz --replace 
yet again I can get basic window management back (though unity --replace still 
does not work as it whines about unclean exit states). So one still needs to 
start over again to get it all functioning properly.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: unity 5.8.0-0ubuntu2
  ProcVersionSignature: Ubuntu 3.2.0-20.33-generic 3.2.12
  Uname: Linux 3.2.0-20-generic x86_64
  .tmp.unity.support.test.0:

  ApportVersion: 1.95-0ubuntu1
  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: Tue Mar 27 21:47:25 2012
  DistUpgraded: Fresh install
  DistroCodename: precise
  DistroVariant: ubuntu
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 
(20120124)
  MachineType: LENOVO 32492HU
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-20-generic 
root=UUID=8afc43b9-4675-46b0-8bf8-49bfd422c2c7 ro quiet splash 
i915.i915_enable_rc6=1 vt.handoff=7
  SourcePackage: unity
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/29/2011
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6QET67WW (1.37 )
  dmi.board.name: 32492HU
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr6QET67WW(1.37):bd06/29/2011:svnLENOVO:pn32492HU:pvrThinkPadX201:rvnLENOVO:rn32492HU:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 32492HU
  dmi.product.version: ThinkPad X201
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.7.2-0ubuntu4
  version.ia32-libs: ia32-libs 20090808ubuntu35
  version.libdrm2: libdrm2 2.4.32-1ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu2
  version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu7
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.14.99~git20111219.aacbd629-0ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:0.0.16+git20111201+b5534a1-1build2

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