Fullscreen windows flickering

[V10lator]

Hi,
whenever I play a game in fullscreen and some other application draws a popup (like a skype notification, for example) the screen flickers (when the popup gets drawn and when it's removed again). I don't know what's the issue here but I saw it with both, compiz and xfwm4. With xfwm4 I tried disabling the unredirecting of fullscreen windows, but that made things even more worse: The flickering was still there but the popup was just visible for (a part of) a second. I can't test the same with compiz as it has been removed from the PC.

I'm using:

• x11-base/xorg-server-1.13.1
  
• x11-drivers/ati-drivers-13.3_beta3 (self made ebuild to see if the issue may have been fixed there)
  
• Kernel 3.8.4 (directly from kernel.org)

My card is a Radeon HD 6950.

[dimko]

It's normal behaviour.

Being using gentoo with nvidia for a while, happened with me quite often too.
Simply disable most visual skype warnings...
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Just a user.

[V10lator]

This really shouldn't be handled as "normal" behaviour. Some action seems to take more time than a frame has to get drawn. First I thought it's cause compiz/xfwm4 has to switch from unredirected to redirected mode (which is also what google told me) but changing this didn't help (and weirdly made it even more annoying).

I would love to know who's responsible for that (the X server, the compositor, the GPU driver, ...) to ask them to fix this.

[dimko]

I use gnome 2, so issue is not what you think it is. I don't use compiz.

So it's either Xorg or something to do with Nvidia drivers, which I don't know if you are using.
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Just a user.