When I switch from gvim to another application and then after some time switch back gvim window appears blank with cursor blinking in the middle. Sometimes toolbar and tabs look like a white space.
When I opening a new tab, tab bar doesn't refresh itself and shows the same tabs as before opening new tab. When I resizing window everything goes back to normal.
How to fix gvim rendering problem in gentoo linux (or how to understand what causes this problem)?