[solved, somehow] new nvidia makes black X

[Vrenn]

Hello

Today I updated my drivers to nvidia-kernel/glx-1.0.8756, who made my X just paint a black screen. downgrading to nvidia-kernel/glx-1.0.8178-r3 helped. At first i wanted to let someone know that he is not alone. But do you know why that happened? Did they remove Geforce2go support or anything like that?
PS: my xorg-x11 is 6.8.2-r6 and running correctly for months and logs in /var/log don't show any warning (all tells me that X startet correctly if there wouldn't be a back TFT).
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With nice greetings
Vrenn