neomagic and shadowfb

Piotr Gluszenia Slawinski curious at
Wed Mar 10 17:28:27 PST 2010

i've tried to enable shadowfb on neomagic (nm2160) chipset,

X start up, but there are no updates, just un-cleared
buffer from last session is displayed.

is this bug or feature?

ad shadowfb option in general - is there any setting regarding
frequency of shadow framebuffer being copied to video card memory ?


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