On Feb 21, 2008 1:50 AM, Jesse Barnes <jesse.barnes@intel.com> wrote:
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> > I would like to know what they're for.
> They're for saving and restoring GPU state across suspend/resume.  They're
> particularly useful if your machine doesn't re-POST at resume time.  In that
> case your GPU may be totally uninitialized, so either the kernel or X has to
> set it up for you (X only does that partially).

Ok. A lot to digest.


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> Interesting, which chipset do you have?  AFAIK that shouldn't cause a hang.

(II) intel(0): Integrated Graphics Chipset: Intel(R) 945GM


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> I know I fixed that problem in at least one configuration...  Can you try:
>   # echo test > /sys/power/disk
>   # echo disk > /sys/power/state
> and see if that also turns your screen green?

Yes, still green. But I got it to actual reboot with ...

echo reboot > /sys/power/disk

So, next I'll try "shutdown" to see if it work. I was using "platform".


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> Also, getting a GPU register dump would be helpful.  The intel_reg_dumper tool

Attached are the two dumps from console. One prior to suspend, and one
after resume.

Thanks,
Jeff.