Bug 256363

Version:           unspecified (using KDE 4.5.3) 
OS:                Linux

Randomly, when I click on Kmenu or try to raise right-click menu on desktop, menu doesn't show. When I turn on blur effect I can see blurred background of KMenu, but without content. I can even click on apps in it. Other menus/dialogs works fine. Problem occur when composite is enabled.

Video may be better than thousand words: http://www.youtube.com/watch?v=RiSgt5hLWCg

All starter after upgrading Qt to 4.7.0 and KDE to 4.5.3 (unfortunately at once). Then I was trying to downgrade KDE to 4.5.2, but this doesn't help at all. Downgrading Qt was bad idea, but I can do it if this is important.

Problem occur on Intel graphics. I have Radeon as well - on it everything works fine.

Versions of software I tried:
Mesa - 7.9 then git
libdrm - 2.4.22 then git
Qt - 4.7

Reproducible: Always

Steps to Reproduce:
Run KDE on Intel graphics, click on KMenu.

Actual Results:  
Sometimes KMenu is showing, sometimes not.

Expected Results:  
KMenu shows.