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On 2013-11-19T14:05:03+00:00 Mpi-g wrote:

Created attachment 89467
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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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/0

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On 2013-11-19T14:06:02+00:00 Mpi-g wrote:

Created attachment 89468
Xorg.log with 16 bits depth in xorg.conf

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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/1

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On 2014-01-06T15:47:17+00:00 Mpi-g wrote:

FWIW the patches mentionned in http://lists.freedesktop.org/archives
/mesa-dev/2013-December/050218.html work for me.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/2

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On 2015-06-04T03:10:35+00:00 Herminio wrote:

I am seeing the same thing in Debian Testing. Those patches woorked all
the way up to mesa 10.5.5 then they began to fail.

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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/6

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On 2015-06-04T03:15:03+00:00 Herminio wrote:

Created attachment 116274
glxinfo output

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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/7

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On 2015-11-18T04:11:26+00:00 Herminio wrote:

I noticed in the 11.0.3 release notes that this issue was fix. However I
am running Lubuntu 16.04 (development) on my iBook G4 and I am still.
Getting the same issue. When I change to Defaul Depth 16 I get 3D
acceleration. I ran strace under both conditions and am post them plus
my Xorg.0.log

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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/13

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On 2015-11-18T04:12:17+00:00 Herminio wrote:

Created attachment 119753
strace default depth 24

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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/14

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On 2015-11-18T04:13:21+00:00 Herminio wrote:

Created attachment 119754
strace default depth 16

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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/15

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On 2015-11-18T04:14:23+00:00 Herminio wrote:

Created attachment 119755
xorg log

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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/16

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On 2015-12-19T12:16:45+00:00 Mpi-g wrote:

I confirm that this bug is still present with Mesa 11.0.6.

Without forcing "DefaultDepth" to 16, I get:

  $ glxgears
  libGL error: No matching fbConfigs or visuals found
  libGL error: failed to load driver: r300
  libGL error: No matching fbConfigs or visuals found
  libGL error: failed to load driver: swrast

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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/17

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On 2016-02-13T15:05:32+00:00 Max May wrote:

With Ubuntu Mate 16.04a2 on a G4 PowerBook5,8 I have to confirm, that
this bug is still present with Mesa 11.1.1.

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https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/18

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On 2016-02-14T13:49:12+00:00 ernsteiswuerfel wrote:

Can confirm this bug on Ubuntu MATE 16.04 daily, Mesa 11.1.1. On a
PowerBook 5,6.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1432949/comments/20


** Changed in: mesa
       Status: Unknown => Confirmed

** Changed in: mesa
   Importance: Unknown => Medium

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Title:
  r300 Mesa driver not loading with KMS enabled

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