Display corruption with 2.6.35-25-generic from maverick-proposed

[Jason Gerard DeRose]

Upon installing 2.6.35-25-generic from maverick-proposed, a serious regression causes display corruption to the point of making my system completely unusable.

I have a Samsung SyncMaster 305T 2560x1600 monitor (requires dual-link DVI) with a Radeon 4670 graphics card. There were some serious kernel mode setting bugs in the past related to dual-link displays, not sure if those bugs might be rearing their ugly head again.

Although my hardware setup isn't very common (monitor), this proposed kernel should *not* be released into updates/security till this bug is fixed. This is a ruin-your-day regression.

Graphics card info from lspci -v:

04:00.0 VGA compatible controller: ATI Technologies Inc RV730XT [Radeon HD 4670] (prog-if 00 [VGA controller])
 Subsystem: Hightech Information System Ltd. Device 2003
 Flags: bus master, fast devsel, latency 0, IRQ 73
 Memory at d0000000 (64-bit, prefetchable) [size=256M]
 Memory at fbce0000 (64-bit, non-prefetchable) [size=64K]
 I/O ports at c000 [size=256]
 Expansion ROM at fbcc0000 [disabled] [size=128K]
 Capabilities: <access denied>
 Kernel driver in use: radeon
 Kernel modules: radeon

Note that I had to boot with 2.6.35-24-generic to file this bug.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-24-generic 2.6.35-24.42
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-24.42-generic 2.6.35.8
Uname: Linux 2.6.35-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: jderose 2246 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfbaf8000 irq 74'
   Mixer name : 'Analog Devices AD1989B'
   Components : 'HDA:11d4989b,10438372,00100300'
   Controls : 48
   Simple ctrls : 27
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfbcfc000 irq 75'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100100'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
CheckboxSubmission: fdbdfcded0c0bb479a6b52e9ec5af131
CheckboxSystem: edda5d4f616ca792bf437989cb597002
Date: Sun Jan 16 17:05:32 2011
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=2681fd0f-f15a-4c82-8934-e50da0a2003c
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: System manufacturer System Product Name
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-24-generic root=UUID=52a489db-f208-408b-a28b-792623111a2f ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38.3
RfKill:

SourcePackage: linux
dmi.bios.date: 03/17/2010
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 WS PRO
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:bd03/17/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP6TWSPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Tom Nicholls (pmyteh)]

Confirmed - this bug also affects me. I have also had to reboot into 2.6.35-24 to use my machine.

Unlike the original reporter, I am using a standard BenQ G900 panel, not a dual-link monitor. Graphics card is an ATI Radeon HD 4850:

01:00.0 VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4850] (prog-if 00 [VGA controller])
 Subsystem: Hightech Information System Ltd. Device 2266
 Flags: bus master, fast devsel, latency 0, IRQ 45
 Memory at d0000000 (64-bit, prefetchable) [size=256M]
 Memory at fe7f0000 (64-bit, non-prefetchable) [size=64K]
 I/O ports at c000 [size=256]
 Expansion ROM at fe7c0000 [disabled] [size=128K]
 Capabilities: [50] Power Management version 3
 Capabilities: [58] Express Legacy Endpoint, MSI 00
 Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
 Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
 Kernel driver in use: radeon
 Kernel modules: radeon