[ubuntu] Screen tearing on ATI Mobility Radeon HD 5470

view story

http://ubuntuforums.org – I have a bit of a trouble with screen tearing with my ATI Mobility Radeon HD 5470. When I use the screen tearing option in Catalyst, the video have a very low frame rate. When disabling the screen tearing option in Catalyst but enable Sync to VBlank in Compiz, the frame rate gets even worse. What did help though is enabling Benchmark in Compiz (and using the screen tearing option in Catalyst). I can not figure out what magic the benchmark do. I tried maximizing the update frequency in Compiz, but that did not help much. (Hardware)