[Bug 27529] New: [rs690m] Graphics corruption with ati x1200

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27529

           Summary: [rs690m] Graphics corruption with ati x1200
           Product: xorg
           Version: 7.5
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Keywords: regression
          Severity: major
          Priority: high
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: bryce at canonical.com
         QAContact: xorg-team at lists.x.org


Forwarding this bug from Ubuntu reporter Brian Visel:
http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/556782

[Problem]
Graphics corruption with KMS enabled

[Original Description]
I can't see things right now to report the bug, but I wanted to run ubuntu-bugs
xorg while there was a curruption present.  i'll fill out this bug more
completely later.



First: I've upgraded from 9.10 to 10.04 beta. My system updates are current.
  I have a radeon rs690m (x1200)

This is the problem I ran into:
  * Small, horizontal white lines that appear a bit like static. Not very
noticeable, and not present currently.
  * Medium and large horizontal lines / areas of corruption.
    * Stripes are often screen-wide
    * Stripes can be scrolled, e.g., in Firefox or Nautilus.
    * Refresh of graphical object clears up corruption -- E.g., a mouseover of
a link or highlighting an icon
  * Mouse Pointer gets corrupted at some points, until refreshed (e.g., when
the cursor changes from pointer to question mark, or to a hand, or from hand to
arrow, etc.).
    * Corruption occurs regardless of whether or not Desktop Effects are
enabled (important later)
      * Corruption might only occur after desktop effects *have* been enabled
during this run.
  * Some fonts become corrupted. If they do, the letters corrupted stay
corrupt. I.e., if "k" gets corrupted, and I type "k" elsewhere in the same
font, that too will be corrupted.

It would be really nice to fix this before the release of Lucid -- I can't
imagine what would happen with all the rs690 users out there. Not that there
are a lot, but, there are enough.

Workaround (sort of):
In /etc/modprobe.d/radeon-kms.conf, I set:
 options radeon modeset=0

Why just "sort of"?
  * Logging into the (only) account created when the system was 9.10 fails, at
best booting me back to the login screen.
  * Logging into an account created since the system has been upgraded to 10.04
works fine, desktop effects and all, no graphics glitches.
  * Logging into the 9.10-made account with desktop effects disabled works
fine.
  * Enabling desktop effects once logged in makes the system visually unusable
-- cannot switch to console, graphical screen black except for mouse, but the
system is still running. I can ctrl-alt-delete from a 'text' console, although
there is no text -- it just shows what was last in the graphics buffer (a black
screen with the mouse pointer present).

Note that although there were glitches graphically, desktop effects or not, the
system worked with desktop effects enabled when kms was enabled.

I think there are probably two problems here:
1) KMS causing or making visible some kind of horrible memory badness that I
don't understand
2) Desktop Effects config in 9.10 can be set to a state that doesn't play
nicely in 10.04 with KMS disabled.

Any further information I will be happy to provide. I have a workable system, I
can just transfer everything over to a new account on my system, but I want to
make sure others aren't affected problematically -- and it would be nice just
to use my old account.

-Brian

Note: Included screenshots are *screenshots*, not photos. The actual images in
memory are corrupt.


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.utf8SourcePackage: 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: codename:           lucid
 architecture:       i686
 kernel:             2.6.32-19-generic

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