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https://freedesktop.org/bugzilla/show_bug.cgi?id=918
Summary: color buffer alpha channel not available in any visuals
Product: Mesa
Version: unspecified
Platform: PC
URL: http://debug.sat.qc.ca/mga/x/
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Drivers/DRI/MGA
AssignedTo: dri-devel@...
ReportedBy: spiette@...
Under XFree86 4.3.0 and Xorg 6.7.0, the mga driver is kind of buggy. It was fine
in 4.2.1. Some GL applications don't show anything, others have performance
issues. Compare the alpha column of the output of glxinfo under xfree86 4.2.1
(http://debug.sat.qc.ca/mga/x/4.2.1/glxinfo-4.2.1.txt) vs. 4.3.0
(http://debug.sat.qc.ca/mga/x/4.3.0/glxinfo-4.3.0.txt) and xorg 6.7.0
(http://debug.sat.qc.ca/mga/x/6.7.0/glxinfo-6.7.0.txt).
This is under gentoo, but I have the same results in Debian (I haven't tried
xorg in debian though).
In http://debug.sat.qc.ca/mga/x/ you should find all information you need. The
XF86Config file is the same for all setup.
FYI, it's the same thing in 16bpp.
Abit KT7ARAID/512MB RAM, Matrox G450 32MB AGP.
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