high cpu usage in xbmc with crystalhd / OSS radeon driver
Dell Inspiron zino HD 410 (phenom x3 @ 2.1GHz, ATI 5450). Ubuntu 12.04 with xorg-edgers PPA (kernel 3.5, some radeon git from june ...).
In windows with crystalhd + ati my CPU load is less than 10%.
In Linux it's about 70%. If I use fglrx it's much lower but the problems outweigh the benefits there, since it consistently panics the kernel on shutdown.
Now I do believe that, since xbmc draws via OpenGL, most of that load comes from simply drawing to the screen.