Ongame tables getting black sometimes

[Al4as]

So my bro has this problem, and I had it too sometimes when I play on my laptop.
When he tries to play 3+ tables, sometimes the table will go entirely black for a couple seconds, sometimes up to 30 seconds. Sometimes it will only be a part of the table which goes black...
Any ideas ?

[fyraplusgrader]

I have the same problem on one of my computers..running win xp..I have no problem on my laptop..

[zion]

It´s a very well known longterm-problem.
Ongame just doesn´t care.