[Openchrome-users] problem with resume after suspend to ram with epia SP8000

[Thomas Hellström]

druyts pascal wrote:

> Thank you Thomas, I indeed went trough the doc but somehow ... did not 
> remeber what you wrote ;-). So the problem is known and we have to 
> wait for someone ready to contribute. Maybe some code could be 
> extracted from the via driver because as I said, resume is working 
> with it.
>
> By the way, I was going trough the sources of the driver and noticed 
> that a lot is related to setting the registers of the graphic card. 
> Are those registers and their function documented somewhere? I was for 
> example trying to undeerstand what the noscale mode was doing. I saw 
> that it loaded other values in the registers, but without 
> documentation, this looked to me like black magic.
>
> It would be nice if such documentation could be collected on the 
> openchrome site.
>
> Thanks,

There are such docs available from VIA under a "Linux addendum to NDA".
I have such docs for some chipsets but not for any TV encoders. I guess,
but I'm not sure, that the failing of TV-out after a suspend is not due
to the TV-encoder setup but due to failing to set up the VGA registers
correctly. If we could find the cause, we would even be able to have
TV-out on those K8N800 laptops that have no BIOS setting for TV-out.

/Thomas