[Bug 33042] New: RV770: Broken Mipmap creation/display

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Jan 12 17:23:51 PST 2011


           Summary: RV770: Broken Mipmap creation/display
           Product: DRI
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: andreas.bombe at mytum.de

Created an attachment (id=41946)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=41946)
Celestia screenshot

I'm using mainline Linux kernels, and this bug is a regression from 2.6.36. It
got broken already in 37-rc series but I haven't noticed it (compiz desktop
works fine) and didn't get around to report it in time.

The latest kernel I've tested is 2.6.37-05292-g7bc4a4c running Debian sid.

It appears that the vertical size assumed during display of the mipmap is twice
the mipmap's height. See attached screenshot from Celestia which shows the
first level mipmap on the central star. Horizontal size seems to be correct.

Zooming outward reveals further mipmap levels with unrelated data as can be
seen on the other two stars in the image.

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