[Bug 71789] New: [r300g] Visuals not found in (default) depth = 24

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71789

          Priority: medium
            Bug ID: 71789
          Assignee: dri-devel at lists.freedesktop.org
           Summary: [r300g] Visuals not found in (default) depth = 24
          Severity: normal
    Classification: Unclassified
                OS: OpenBSD
          Reporter: mpi at openbsd.org
          Hardware: PowerPC
            Status: NEW
           Version: 9.2
         Component: Drivers/Gallium/r300
           Product: Mesa

Created attachment 89467
  --> https://bugs.freedesktop.org/attachment.cgi?id=89467&action=edit
Xorg.log without configuration file

Without xorg.conf or with a pixel depth of 24 bits, any application linked to
libGL will fails to load the "r300" driver and after it the "swarst" driver
with the following message:

  libGL error: failed to load driver: r300
  libGL error: Try again with LIBGL_DEBUG=verbose for more details.
  libGL error: failed to load driver: swrast
  libGL error: Try again with LIBGL_DEBUG=verbose for more details.

This problem is present in all the Mesa 9.x release up to 9.2.3.  But it is not
in the 8 (which segfault at some point), 7.11 was working without config file.

After a bit of investigation, I found that driConvertConfigs() returns NULL in 
dri2CreateScreen() when trying to find matching visuals
(src/glx/dri_glx.c:450).  However if I specify a depth of 16 bits in my
xorg.conf I cannot reproduce this problem.

This problem is present on OpenBSD -current (future 5.5) which has the drm
drivers synced with Ubuntu's linux 3.8 kernel.

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