Videos got slower for radeon 7000
I recenty started to migrate from Lucid (10.04) to Precise (12.04). Unfortunately, I have noticed that the video rendering performance has decreased with Precise. Videos with a resolution of about 720x576 that are played smoothly on Lucid are either flickering or shortly hanging in-between while played on Precise (the standard video player tends more to flickering, in vlc I get hangs).
I should mention that I have a quite old graphics card, it is identified by the X server as
Chipset: "ATI Radeon VE/7000 QY (AGP/PCI)" (ChipID = 0x5159)
At first I tried booting with "radeon.modeset=1" or setting RenderAccel "off" in the xorg.conf, but this didn't help. Then I thought that this behaviour might be caused by problems in the xserver-
I would like to narrow down the problem, but I am currently unsure how to proceed. Are there any tools that can help in debugging? I have installed Lucid and Precise on different partitions, so I can easily compare between them. Should I try a different kernel? Any other ideas how to proceed?
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