I made some more tests. I wonder that the Composite option is disabled in the xorg.conf that I attached - no I can reproduce the effect only by enabling the Composite option. With disabled Composite option the newest version of fglrx plays videos in usual speed.
I made some more tests. I wonder that the Composite option is disabled in the xorg.conf that I attached - no I can reproduce the effect only by enabling the Composite option. With disabled Composite option the newest version of fglrx plays videos in usual speed.