Comment # 5 on bug 99275 from Reimar Imhof

I've attached the logs and the info about changed components.
They are all from
download.opensuse.org/repositories/X11:/XOrg/openSUSE_Leap_42.2/

The flicker problem is not about the menu but the drop down list that opens
when you enter an address to the firefox address field.

A second effect:
When I re-size a window using kernel 4.8.14 the background (or underlying
windows) shine through.
When I do so using kernel 4.9 it also starts flickering and shows artifacts
from the background.