Created attachment 118913 [details]
Distribution: Arch Linux
Package version: xf86-video-intel 1:2.99.917+478+gdf72bc5-2
There is a lag when using keyboard and mouse on QT based applications (e.g. Skype, VirtualBox) but not in the rest of the system.
The lag is "solved" when using UXA acceleration -
Based on previous investigations, my immediate suspicion is that the Qt applications are effectively running unthrottled and build up a long render queue.
Looking at intel-gpu-top or even intel-gpu-overlay should show the GPU maxed out (or nearly), and netstat --unix should (if I am right about the backlog being large enough) show pending bytes from the client to X.
How can I produce a log of the GPU usage so i can attach it to the bug report?
Thanks for the support