linux kernel : 3.2.0
libdrm-radeon1 : 2.4.29
xserver-xorg-video-radeon : 6.14.99
motherboard : ASUS M2A-VM HDMI (*no* VIA chipset)
Graphics card : msi R5450 with 1 Gb onboard
RAM memory size : 4 Gb
Description : when booting, the message "Ring buffer test failed" appears in dmesg log. A a consequence, the software rasterizer is chosen, and after X is started, there is no 3D acceleration.
Workaround : when I add "mem=3G" to the kernel parameters, the message disappears, and I get 3D acceleration. Of course, 1 Gb of RAM memory is lost for the applications.
(log files will get attached to this bug report)
It's very similar to the problem described in http://lkml.indiana.edu/hypermail/linux/kernel/1105.2/03496.html
Nevertheless, it's not exactly the same hardware conditions, and the radeon driver patch that did solve that problem does not work for me.
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Ouch, I just realized there was a "nomodeset" option left from an old test. I'll see if that changes anything to the dmesg etc. Sorry.
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correct version of dmesg
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correct version of cat /proc/cmdline
Rebooted with correct kernel parameters and attached corresponding versions of dmesg and cat /proc/cmdline. The other files do not change significantly. Sorry for the mistake.
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