https://bugs.freedesktop.org/show_bug.cgi?id=79551
--- Comment #8 from Maxim ya.maxis11@yandex.ru --- (In reply to comment #7)
(In reply to comment #6)
if in /etc/environment set DRI_PRIME=1 and in /etc/xprofile set xcompmgr -c & some apps will display with artifacts (part of window freezes when scrolling)
Apps using PRIME, or others?
BTW, just xcompmgr -a should be enough, no need for -c.
others. Today I've tested with DRI_PRIME=0. Same lags. It's appear, when xcompmgr running.