[Bug 614670] [NEW] suspend/resume garbles ATI Radeon screen (but not screenshots)

[jimav]

Public bug reported:

Suspend/resume garbles the screen (both X and  VTs) by consistently
shifting pixels, producing a wierd emboldening effect and color shadows.

Using AT Radeon graphics card and large (1920 x 1280) monitor, with the
standard FREE driver (not fglrx).

Taking a screen-shot produces an unaffected image (does not exhibit the
corruption).  So the bug may have to do with some rendering settings in
the hardware, rather than actually corrupted display memory (just
speculation).  The problem never occurs after a normal boot, only after
resume.

The problem does not always occur (but usually does).  So it there may
be some memory or hw register not being initialized.

I will attach cellphone photos showing the corrupted screen (as
mentioned above, a screenshot does not show the problem).

Note: This is an old problem.  In Ubuntu 9.10 I used fglrx and the
problem would occur somewhat less frequently, and when it did the VTs
were not affected, and switching to a VT and back to X fixed the
corruption.  But int 10.04 VTs are affected also and switching does not
help.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image (not installed)
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-23.37-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-23-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  jima       1529 F.... pulseaudio
 /dev/snd/pcmC0D0p:   jima       1529 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfbaf8000 irq 22'
   Mixer name	: 'Realtek ALC1200'
   Components	: 'HDA:10ec0888,104383c0,00100101'
   Controls      : 35
   Simple ctrls  : 20
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfbbfc000 irq 34'
   Mixer name	: 'ATI R6xx HDMI'
   Components	: 'HDA:1002aa01,00aa0100,00100000'
   Controls      : 4
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [off]
Date: Fri Aug  6 23:26:10 2010
HibernationDevice: RESUME=UUID=cb241bc2-3850-4161-898f-caa64bf877da
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
 
 vboxnet0  no wireless extensions.
MachineType: System manufacturer System Product Name
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-23-generic root=UUID=6ac6f5f8-5733-4d3e-878a-c901d4847ce7 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.1
RfKill:
 
SourcePackage: linux
dmi.bios.date: 12/30/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1004
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P6T
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1004:bd12/30/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP6T:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

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


** Tags: amd64 apport-bug lucid needs-upstream-testing resume suspend

-- 
suspend/resume garbles ATI Radeon screen (but not screenshots)
https://bugs.launchpad.net/bugs/614670
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