** Description changed:

+ SRU Justification
+ 
+ Impact: A regression in the 2.6.32-34 kernel is causing graphics
+ corruption on the Asus A7V-E with nvidia graphics.
+ 
+ Fix: Backport of upstream bug fix for range-restricted allocations in
+ DRM.
+ 
+ Test case: Verified to fix corruption by reporter on LP #873130.
+ 
+ ---
+ 
  The X login screen breaks up in Xubuntu 10.04.3 LTS, after i have
  upgraded my kernel.
  
  kernel 2.6.32-33-generic worked fine, 2.6.32-34-generic garbled the
  login screen: No buttons, only the login screen background and panel
  below, copies of the mouse cursor and some garbage. No text.
  
  I *can* log in by guessing what happens in the screen (no text shown...)
  - the Xubuntu desktop opens, with background and the panels, but most of
  the panel widgets are "missing" and I must only guess what should be on
  screen: something should appear, but nothing can be seen. The terminals
  (Ctrl+F1...F6) works nicely though.
  
  Possibly affected packages (my guess): linux, xorg, gdm, xfwm4
  
  Temporary fix: By choosing kernel 2.6.32-33 in boot time
  
  Can be reproductable: By choosing kernel 2.6.32-34 in boot time
  
  What changed:
  (here is a part of the diff against the new(<) and old(>) version):
  (most suspectable diff parts, selected from /var/log:  dmesg, messages, 
debug, daemon.log, syslog, kern.log):
  
  < [TIMESTAMP] Linux version 2.6.32-34-generic (buildd@vernadsky)
-  (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #77-Ubuntu SMP
-  Tue Sep 13 19:40:53 UTC 2011 (Ubuntu 2.6.32-34.77-generic 2.6.32.44+drm33.19)
+  (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #77-Ubuntu SMP
+  Tue Sep 13 19:40:53 UTC 2011 (Ubuntu 2.6.32-34.77-generic 2.6.32.44+drm33.19)
  ---
  > [TIMESTAMP] Linux version 2.6.32-33-generic (buildd@zirconium)
-  (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #72-Ubuntu SMP
-  Fri Jul 29 21:08:37 UTC 2011 (Ubuntu 2.6.32-33.72-generic 2.6.32.41+drm33.18)
+  (gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #72-Ubuntu SMP
+  Fri Jul 29 21:08:37 UTC 2011 (Ubuntu 2.6.32-33.72-generic 2.6.32.41+drm33.18)
  
  < [TIMESTAMP] Kernel command line: BOOT_IMAGE=/vmlinuz-2.6.32-34-generic
-  root=UUID=b68f5eec-3aa8-4780-a47e-c3bd1e26389c ro quiet splash
+  root=UUID=b68f5eec-3aa8-4780-a47e-c3bd1e26389c ro quiet splash
  ---
  > [TIMESTAMP] Kernel command line: BOOT_IMAGE=/vmlinuz-2.6.32-33-generic
-  root=UUID=b68f5eec-3aa8-4780-a47e-c3bd1e26389c ro quiet splash
+  root=UUID=b68f5eec-3aa8-4780-a47e-c3bd1e26389c ro quiet splash
  
  < [TIMESTAMP] [drm] nouveau 0000:01:00.0:
-  allocated 1280x1024 fb: 0x45000, bo dfbb9c00
+  allocated 1280x1024 fb: 0x45000, bo dfbb9c00
  ---
  > [TIMESTAMP] [drm] nouveau 0000:01:00.0:
-  allocated 1280x1024 fb: 0x45000, bo df015800
+  allocated 1280x1024 fb: 0x45000, bo df015800
  
  ...
  < [TIME] wader kernel: [TIMESTAMP] [drm] nouveau 0000:01:00.0: validate: -12
  < [TIME] wader kernel: [TIMESTAMP] [drm] nouveau 0000:01:00.0: validate: -12
  < [TIME] wader acpid: client 920[0:0] has disconnected
  < [TIME] wader acpid: client connected from 920[0:0]
  < [TIME] wader acpid: 1 client rule loaded
  < [TIME] wader kernel: [TIMESTAMP] [drm] nouveau 0000:01:00.0: validate: -12
  < [TIME] wader kernel: [TIMESTAMP] [drm] nouveau 0000:01:00.0: validate: -12
  < [TIME] wader kernel: [TIMESTAMP] [drm] nouveau 0000:01:00.0: validate: -12
  < [TIME] wader kernel: [TIMESTAMP] [drm] nouveau 0000:01:00.0: validate: -12
  ...
  
  (...and continues with ~100 more validate messages...)
  
- 
- The differences in /var/log/Xorg.0.log (and /var/log/gdm/:0.log) between new 
and old kernel versions:
+ The differences in /var/log/Xorg.0.log (and /var/log/gdm/:0.log) between
+ new and old kernel versions:
  
  < Current Operating System: Linux wader 2.6.32-34-generic #77-Ubuntu SMP
-  Tue Sep 13 19:40:53 UTC 2011 i686
+  Tue Sep 13 19:40:53 UTC 2011 i686
  > Current Operating System: Linux wader 2.6.32-33-generic #72-Ubuntu SMP
-  Fri Jul 29 21:08:37 UTC 2011 i686
+  Fri Jul 29 21:08:37 UTC 2011 i686
  
  < Kernel command line: BOOT_IMAGE=/vmlinuz-2.6.32-34-generic
-  root=UUID=b68f5eec-3aa8-4780-a47e-c3bd1e26389c ro quiet splash
+  root=UUID=b68f5eec-3aa8-4780-a47e-c3bd1e26389c ro quiet splash
  > Kernel command line: BOOT_IMAGE=/vmlinuz-2.6.32-33-generic
-  root=UUID=b68f5eec-3aa8-4780-a47e-c3bd1e26389c ro quiet splash
+  root=UUID=b68f5eec-3aa8-4780-a47e-c3bd1e26389c ro quiet splash
  
  < (II) NOUVEAU(0): Opened GPU channel 1
  < (II) NOUVEAU(0): [DRI2] Setup complete
  < (II) NOUVEAU(0): GART: 32MiB available
  < (II) NOUVEAU(0): GART: Allocated 16MiB as a scratch buffer
  
  > (II) NOUVEAU(0): Opened GPU channel 1
  > (II) NOUVEAU(0): [DRI2] Setup complete
  > (II) NOUVEAU(0): GART: 32MiB available
  > (EE) NOUVEAU(0): Unable to allocate GART memory
  
- 
- So it looks like, the (currently running) old kernel 2.6.32-33 didn't 
allocate GART. My best guess is that GART thing was somewhat enabled in new 
kernel update. It haven't been enabled before, with Xubuntu 10.4 installed, 
according to previous logs.
+ So it looks like, the (currently running) old kernel 2.6.32-33 didn't
+ allocate GART. My best guess is that GART thing was somewhat enabled in
+ new kernel update. It haven't been enabled before, with Xubuntu 10.4
+ installed, according to previous logs.
  
  And yet, it could be something with my Nvidia RIVA TNT2 graphics card
  and nouveau kernel driver..?
  
  I'm pretty sure it is the kernel package that causes this problem. I can
  try uploading /var/log/apt/history.log if needed for more suspects.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: linux-image-2.6.32-34-generic 2.6.32-34.77
  Regression: Yes
  Reproducible: Yes
  ProcVersionSignature: Ubuntu 2.6.32-33.72-generic 2.6.32.41+drm33.18
  Uname: Linux 2.6.32-33-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
  Architecture: i386
  ArecordDevices:
-  **** List of CAPTURE Hardware Devices ****
-  card 0: AudioPCI [Ensoniq AudioPCI], device 0: ES1371/1 [ES1371 DAC2/ADC]
-    Subdevices: 1/1
-    Subdevice #0: subdevice #0
+  **** List of CAPTURE Hardware Devices ****
+  card 0: AudioPCI [Ensoniq AudioPCI], device 0: ES1371/1 [ES1371 DAC2/ADC]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  agemixer   1269 F.... xfce4-mixer-plu
-                       agemixer   1276 F.... pulseaudio
-                       agemixer   1304 F.... xfce4-volumed
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  agemixer   1269 F.... xfce4-mixer-plu
+                       agemixer   1276 F.... pulseaudio
+                       agemixer   1304 F.... xfce4-volumed
  CRDA: Error: [Errno 2] Tiedostoa tai hakemistoa ei ole
  Card0.Amixer.info:
-  Card hw:0 'AudioPCI'/'Ensoniq AudioPCI ENS1371 at 0xa000, irq 10'
-    Mixer name : 'SigmaTel STAC9721,23'
-    Components : 'AC97a:83847609'
-    Controls      : 36
-    Simple ctrls  : 23
+  Card hw:0 'AudioPCI'/'Ensoniq AudioPCI ENS1371 at 0xa000, irq 10'
+    Mixer name : 'SigmaTel STAC9721,23'
+    Components : 'AC97a:83847609'
+    Controls      : 36
+    Simple ctrls  : 23
  CurrentDmesg:
-  [   24.276438] [drm] nouveau 0000:01:00.0: Allocating FIFO number 1
-  [   24.278696] [drm] nouveau 0000:01:00.0: nouveau_channel_alloc: 
initialised FIFO 1
-  [   29.340108] eth0: no IPv6 routers present
+  [   24.276438] [drm] nouveau 0000:01:00.0: Allocating FIFO number 1
+  [   24.278696] [drm] nouveau 0000:01:00.0: nouveau_channel_alloc: 
initialised FIFO 1
+  [   29.340108] eth0: no IPv6 routers present
  Date: Thu Oct 13 02:09:17 2011
  HibernationDevice: RESUME=UUID=3fa1b2f0-2ad1-4f9d-83e7-5ec49ee84288
  InstallationMedia: Xubuntu 10.04 "Lucid Lynx" - Release i386 (20100429)
  IwConfig:
-  lo        no wireless extensions.
-  
-  eth0      no wireless extensions.
+  lo        no wireless extensions.
+ 
+  eth0      no wireless extensions.
  Lsusb:
-  Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
-  Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
+  Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
+  Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: System Manufacturer System Name
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.32-33-generic 
root=UUID=b68f5eec-3aa8-4780-a47e-c3bd1e26389c ro quiet splash
  ProcEnviron:
-  PATH=(custom, user)
-  LANG=fi_FI.utf8
-  SHELL=/bin/bash
+  PATH=(custom, user)
+  LANG=fi_FI.utf8
+  SHELL=/bin/bash
  RelatedPackageVersions: linux-firmware 1.34.7
  RfKill:
-  
+ 
  SourcePackage: linux
  dmi.bios.date: 03/08/2001
  dmi.bios.vendor: Award Software, Inc.
  dmi.bios.version: ASUS A7V-E ACPI BIOS Revision 1002D
  dmi.board.name: <A7V-E>
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: REV 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 7
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAwardSoftware,Inc.:bvrASUSA7V-EACPIBIOSRevision1002D:bd03/08/2001:svnSystemManufacturer:pnSystemName:pvrSystemVersion:rvnASUSTeKComputerINC.:rn<A7V-E>:rvrREV1.xx:cvnChassisManufacture:ct7:cvrChassisVersion:
  dmi.product.name: System Name
  dmi.product.version: System Version
  dmi.sys.vendor: System Manufacturer

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https://bugs.launchpad.net/bugs/873130

Title:
  Broken X login screen after kernel security update (10/2011)

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