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[Bug 556782]

 

I just had time to try this latest patch.
Unfortunately it does not correct the issue.
Is there any way to check or change the beginning and ending addresses of
sideport memory and stolen system memory once the system is up?
If there are registers I can read or write to experiment I will be happy to
try it,but I am afraid I was unable to comprehend a lot of the register
documentation from AMD.

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https://bugs.launchpad.net/bugs/556782

Title:
  [rs690m] Graphics corruption with ati x1200

Status in The Linux Kernel:
  Confirmed
Status in X.org XServer - ATI gfx chipset driver:
  Fix Released
Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  [Edit]
  This bug has been around for a bit over a year now, and has gotten rather long, so this is a brief summary.
  There is a memory corruption issue that affects users of the rs690m, to varying degrees.
  For many most people, it makes the desktop unusable.

  Workaround:   *Note: This is a workaround, not a fix.  It will give you a usable system.
  [Natty]: Regression: This workaround now only provides 2d/software rendering, and one must either:
     * Choose choose the "Ubuntu Classic" session from the GDM Login screen
     or
     * Install the "unity-2d" package.  
    
  [code]
  sudo su
  echo options radeon modeset=0 > /etc/modprobe.d/radeon-kms.conf
  exit
  [/code]
  Note that this doesn't totally fix the issue, but brings your desktop to a workable state.

  Freedesktop.org has dealt with one bug having to do with graphics corruption on the rs690m.  That bug has been fixed, but the issue of graphics corruption in general has not been resolved.  A new bug has been opened with freedesktop.org to continue pushing through the resolution of this issue.
  [/edit]

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: xorg 1:7.5+3ubuntu1
  ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
  Uname: Linux 2.6.32-19-generic i686
  Architecture: i386
  Date: Tue Apr  6 12:58:29 2010
  DkmsStatus: Error: [Errno 2] No such file or directory
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  MachineType: Gateway LT31
  ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.32-19-generic root=UUID=617a7a50-d35f-4b03-8bf1-f91ec024381b ro quiet splash
  ProcEnviron:
   LANG=en_US.utf8
   SHELL=/bin/bash
  SourcePackage: xorg
  dmi.bios.date: 06/18/2009
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: v1.3201
  dmi.board.name: SJM11-YK
  dmi.board.vendor: Gateway
  dmi.board.version: Not Applicable
  dmi.chassis.type: 10
  dmi.chassis.vendor: Gateway
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrv1.3201:bd06/18/2009:svnGateway:pnLT31:pvrNotApplicable:rvnGateway:rnSJM11-YK:rvrNotApplicable:cvnGateway:ct10:cvrN/A:
  dmi.product.name: LT31
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Gateway
  system:
   distro:             Ubuntu
   codename:           lucid
   architecture:       i686
   kernel:             2.6.32-19-generic

  [lspci]
  01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS690M [Radeon X1200 Series] [1002:791f]
       Subsystem: Acer Incorporated [ALI] Device [1025:028c]

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