Possible bug: nasty interaction between framebuffer and DRI/DRM

[Chris Howells <chrish@gmx.co.uk>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi,

I seem to have discovered a nasty interaction between framebuffer and DRI/DRM 
in OpenGL applications. I can reproduce this problem in at least Return to 
Castle Wolfenstein (version 1.1b) and Tux Racer.

I am using a 32 MB ATI Rage Pro 128 on Debian woody (XFree86 4.1). If I run 
Tuxracer or RTCW, and wait for the game to load, everything is alright. 
However if I switch to a spare virtual terminal, and switch back to X, the 
fonts become illegible -- they just appear as coloured boxes with no 
outlines, making things unplayable.

The problem does not occur when using software based OpenGL rendering which is 
why I believe DRI/DRM is involved. This problem only occurs when framebuffer 
is enabled in the kernel, if framebuffer is disabled the problem disappears, 
so I believe framebuffer is also at fault.

Greatful for any help...

Chris Howells
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE892SKF8Iu1zN5WiwRAgMbAJ0V5bWa85Lfsgu4FFtKeIj4c/YX8gCcCrn6
YU1lq0HuQpefLVGsDvFzN4E=
=qzHZ
-----END PGP SIGNATURE-----


_______________________________________________________________

Don't miss the 2002 Sprint PCS Application Developer's Conference
August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm