[Bug 24601] New: screen corruption with radeon driver &KMS

[<bug...@fr...>]

http://bugs.freedesktop.org/show_bug.cgi?id=24601

           Summary: screen corruption with radeon driver &KMS
           Product: DRI
           Version: DRI CVS
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri...@li...
        ReportedBy: mj...@tl...


Created an attachment (id=30523)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=30523)
bugzilla.png - example of the submit-bug form rendering from
bugs.freedesktop.org

Kernel 2.6.32-rc4, radeon driver from git as of
255ac8d54e3dc12e579e05edb41b40946a00eab8 (Oct 13 2009), libdrm-2.4.14 (with
radeon pieces enabled), mesa-7.6.

Hardware is a built-in (on-motherboard) amd780g chipset.

The corruption is 100% reproduceable but not large.  However for some
applications it is larger and for some even makes the thing unusable.

On the attached bugzilla.png file the corruption is marked by red lines.  It's
obvious in the center of the "add comment" input field (the large horizontal
black line) and at the end of this input field.  It's less obvious but visible
in the menu line of the window.

(I'll attach another example of the same thing, which is much more annoying
than this).

Overall, the corruption always follows mouse, and it is possible to remove it
(once on the screen) by just moving mouse over the corrupt areas.  But
depending on the direction of mouse movements this way may add even more
corruptions.

It also happens when switching between windows.

Most common areas of corruption are the bottom of menu areas, bottom half of
scrollbars, bottom of current menu item (bottom of highlighted area) in gnome
memus and the like.


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