Brief black screen when logging in with compositor

Submitted by Abr..@..dex.ru

Assigned to Olivier Fourdan @olivier

Link to original bug (#15709)

Description

When I run Arch, a black screen appears for a second after LightDM. I have this trouble with only new versions xfwm4 (4.13.0-4.14pre2) and enabled compositing. I tried to change vblank_mode (GLX, Xpresent), but it is not work. If i use xfwm4 4.12.5 with patch (https://git.xfce.org/xfce/xfwm4/commit/?id=6caed779e627c368e2d3e578d1fad60cd7ef1d18) everything is work fine. I tested it on different computers with Arch and Ubuntu Test.