I recently noticed that windows are lagging behind on my system (testing branch, xfce, intel uhd 620). Not sure with which update it came in though.
When running 18.0.4 stable live ISO, there is no such issue.
Just to make sure it's not because of me messing up config setting, I also tried the latest dev iso 18.1.0pre2. Same issue there as well.
Here two short videos that should explain the problem
18.0.4 stable ISO, no prob. Window follows cursor almost instantly:
18.1.0pre2, there is quite some delay before the window follows the cursor:
Graphics: Device-1: Intel UHD Graphics 620 driver: i915 v: kernel Display: x11 server: X.Org 1.20.5 driver: intel unloaded: modesetting resolution: 3440x1440~60Hz OpenGL: renderer: Mesa DRI Intel UHD Graphics 620 (Kabylake GT2) v: 4.5 Mesa 19.0.5
What I tried so far is:
- using 4.19 kernel instead of 5.1
- modesetting instead of the intel driver
- different themes
Doesn't change things though. I assume it has something to do with the compositor. When compositing is switched off, it is not lagging.
Has anyone experienced the same?
Just tried 18.1.0pre1 no issue there.
Setting vblank_mode to xpresent is fixing it (but may introduce other issues, see https://bugzilla.xfce.org/show_bug.cgi?id=15325)
Also note that CPU consumption seems to be higher while dragging windows around.
xfconf-query -c xfwm4 -p /general/vblank_mode -s xpresent