xserver works strange

Binary package hint: xorg

Following Applications:

sauerbraten - a game from respositories. after playing the game for about 10minutes it change from fullscreen to a smaler window. every time.

supertux - a game from respository: after playing the game for about 20 minutes it change from fullscreen to a smaler window but it change it back after 30 sekunds.

lbreakout2 - a game from respotitory: Fullscreenmode is not correctly shown. and when someone calls you from skype on the time you play, and it is fullscreen, the whole xserver freeze. restarting the xserver dont removes the bug. it is still frozen.

game like : "LXDoom Shoot'em Up" do not even start.

when i change with "gdmsetup" the "backgroundcolor" of the loginscreen, it still remains the standard color, after startig gnome. this funktion toes not work ( on previous versions of ubuntu it was possible to change the default color when booting up to an other color. the option is stil there, but it dont work.

what ever i do with "displayconfig-gtk" it do not chance anything. not even the resolution

when i use "nvidia-config" to set up twinview, sometimes the error came ( in terminal): "core dumped" noting more and nothing less, but the resolution is set correctly without confirmation.... very strange...

and azureus still do not work.... but maybe this is not an xserver bug....

I am not an expert, but i think all this bugs do have something to do with the xserver.