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[Launchpad Bug Tracker <1062077@xxxxxxxxxxxxxxxxxx>]

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Symptom: Linux isn't displaying changes after switching to tty1 and back to Unity. Steps to reproduce:
1. Starting up to Unity
2. Switch to tty1 (Strg + Alt + F1)
3. Switching back to Unity

or resuming the system from suspend leads to the same isssue.This method
isn't as reliable as the method stated above.

What happens: The screen freezes. Magic Keys [Alt + Print + S/U/B] are
working thou (so linux-kernel is responding?!) I can't switch to tty1
either. The system becomes responding again after ~2min. Switching VTs
is possible afterwards but leads to the same bug again.

What is expected: Showing up a responding Unity.

WORKAROUND: My radeon is switched off using:
echo"OFF">/sys/kernel/debug/vgaswitcheroo/switch 
By turning "ON" the graphics card the above stated problem doesn't appear.

A kern.log:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1062077/+attachment/3374796/+files/kern.log

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-3.5.0-17-generic 3.5.0-17.26
ProcVersionSignature: Ubuntu 3.5.0-17.26-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  octavian   2405 F.... pulseaudio
Date: Fri Oct  5 09:07:44 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110921.2)
MachineType: Hewlett-Packard HP TouchSmart tm2 Notebook PC
ProcFB:
 0 inteldrmfb
 1 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic root=UUID=2e9be59f-1f91-4313-bfac-3babbffc5c00 ro quiet splash pcie_aspm=force i915.i915_enable_rc6=1 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.5.0-17-generic N/A
 linux-backports-modules-3.5.0-17-generic  N/A
 linux-firmware                            1.94
SourcePackage: linux
UpgradeStatus: Upgraded to quantal on 2012-09-14 (20 days ago)
dmi.bios.date: 07/30/2010
dmi.bios.vendor: Insyde
dmi.bios.version: F.12
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1486
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 83.1A
dmi.chassis.asset.tag: CNU0250216
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.12:bd07/30/2010:svnHewlett-Packard:pnHPTouchSmarttm2NotebookPC:pvr0489200000252A20001220000:rvnHewlett-Packard:rn1486:rvr83.1A:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP TouchSmart tm2 Notebook PC
dmi.product.version: 0489200000252A20001220000
dmi.sys.vendor: Hewlett-Packard
---
.tmp.unity.support.test.0:

ApportVersion: 2.8-0ubuntu4
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
DistUpgraded: 2013-02-07 06:43:51,807 DEBUG enabling apt cron job
DistroCodename: raring
DistroRelease: Ubuntu 13.04
DistroVariant: ubuntu
DkmsStatus:
 virtualbox, 4.1.22, 3.5.0-23-generic, x86_64: installed
 virtualbox, 4.1.22, 3.8.0-4-generic, x86_64: installed
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:1486]
 Advanced Micro Devices [AMD] nee ATI Manhattan [Mobility Radeon HD 5400 Series] [1002:68e0] (rev ff) (prog-if ff)
InstallationDate: Installed on 2012-12-04 (64 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
MachineType: Hewlett-Packard HP TouchSmart tm2 Notebook PC
MarkForUpload: True
Package: xorg 1:7.7+1ubuntu4
PackageArchitecture: amd64
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-4-generic root=UUID=b78f0013-4cb2-4ad2-9c13-9d884b091f3a ro
ProcVersionSignature: Ubuntu 3.8.0-4.9-generic 3.8.0-rc6
Tags:  raring running-unity ubuntu regression reproducible compiz-0.9
Uname: Linux 3.8.0-4-generic x86_64
UpgradeStatus: Upgraded to raring on 2013-02-07 (0 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 07/30/2010
dmi.bios.vendor: Insyde
dmi.bios.version: F.12
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1486
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 83.1A
dmi.chassis.asset.tag: CNU0250216
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.12:bd07/30/2010:svnHewlett-Packard:pnHPTouchSmarttm2NotebookPC:pvr0489200000252A20001220000:rvnHewlett-Packard:rn1486:rvr83.1A:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP TouchSmart tm2 Notebook PC
dmi.product.version: 0489200000252A20001220000
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.9~daily13.02.04-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.42-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.2-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.2-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.2-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.0-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.6-0ubuntu2
xserver.bootTime: Thu Feb  7 22:37:06 2013
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.13.2-0ubuntu1
xserver.video_driver: intel

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Incomplete

** Affects: xserver-xorg-driver-ati
     Importance: Undecided
         Status: New

** Affects: xserver-xorg-video-ati (Ubuntu)
     Importance: Low
         Status: Confirmed


** Tags: amd64 apport-bug apport-collected compiz-0.9 freeze kernel-bug-exists-upstream-v3.11-rc5 latest-bios-f.25 needs-upstream-testing quantal raring regression-release running-unity saucy ubuntu
-- 
[HP TouchSmart tm2-2010eg] Linux hangs with: "[drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting"
https://bugs.launchpad.net/bugs/1062077
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