xfwm4
My setup: Ubuntu 20.04 LTS with latest updates GeForce 8600GT + Asus MM17D (vga connection) + Philips 26PFL3404/12 (component) This is xfwm4 version 4.14.1 (revision 44809c49) for Xfce 4.16 Released under the terms of the GNU General Public License. Compiled against GTK+-3.24.17, using GTK+-3.24.20.
I have a handmade dual display xorg.conf. Xfce4 shows my second device (TV) as black screen but mouse works ok. So I start applications on second display (TV) in this manner:
export DISPLAY=:0.1 ; vlc
Everything is Ok, until I stop video application on the second display (TV). CPU loads jumps up to 90% for xfwm4 and Xorg. I tried 2 workarounds with no luck
This one
xfconf-query -c xfwm4 -p /general/vblank_mode -t string -s "xpresent" --create
And this one:
xfconf-query -c xfwm4 -p /general/use_compositing -s false vlc xfconf-query -c xfwm4 -p /general/use_compositing -s true
