ATI HD6950 is a great GPU which is supposed be full supported by opensource radeon drivers. After lot of pain with opensource driver, I have installed closed source ati-drivers and the card works well. During the process I have tried to follow number of ati/radeon/fglrx guides. My goal was to get the card working on two monitors using single screen.
For start tried xf86-video-ati drivers with kernel gentoo-sources-3.0.6. Initially it worked fine. Xorg did all the work by default and I didn’t have to mess with xorg.conf. I only adjusted primary and secondary monitor using kde-4.7.2 system settings. After a few minutes of testing – junk pixels started appearing around open windows and eventually garbage completely took over my two monitors.
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