"Ring buffer test failed" on Radeon 5450
Submitted by Eric Bischoff
Assigned to Default DRI bug account
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)