https://bugs.freedesktop.org/show_bug.cgi?id=98146 --- Comment #16 from Darek Deoniziak --- Did some more testing with DRI3 and DRI_PRIME=1 to run programs using radeon. 1. is solved with DRI3 as I did mention in last comment 2. Found big new isse about that, screen is not only cutted to half in some fullscreen games (issue happens while playing Serious Sam 3), but it feels like gpu plays few frames for few milliseconds then it plays these frames again (everything feels worse than small fps). It happens not only in fullscreen applications, if I run genymotion (emulator for Android devices) then the same thing happens. Changing vsync doesn't help. Dota 2 works fine. 3. flickering still happens and additionaly this flashes from time to time, usually when window is not focused: http://i.imgur.com/D0XniPL.png The image also shows cutted screen to half which happens quite often. 4. solved with DRI3, no freezing after closing fullscreen programs 5. solved with DRI3, no issues with external monitor. What options I could try to solve above issues? 2nd is now the biggest one. Tried for both radeon and intel: Option "SwapBuffersWait" "0" Option "TearFree" "true" (also tried "on", is there any difference?) Noone did help radeon, intel is working fine for both DRI2 and DRI3 (all above issues are related radeon). -- You are receiving this mail because: You are the assignee for the bug.