https://bugs.freedesktop.org/show_bug.cgi?id=83810
--- Comment #1 from sunweb@hotmail.ru --- Sorry corection for step 4:
4) Disable VBOs(as shown in step 1) and and make a stroke everything works and really fast then switch on VBOs again and your paint will disappear but turning off VBOs again will show the one you draw before.