Comment 300 for bug 1140716

(In reply to comment #27)

> > The only interesting patch I can suggest atm is
> >
> > commit 31643d54a739382626c27c0f2a12b3bbc22d1a38
> > Author: Ben Widawsky <email address hidden>
> > Date: Wed Sep 26 10:34:01 2012 -0700
> >
> > drm/i915: Workaround to bump rc6 voltage to 450
> >
> > BIOS should be setting the minimum voltage for rc6 to be 450mV. Old or
> > buggy BIOSen may not be doing this, so we correct it for them. Ideally
> > customers should update the BIOS as only it would know the optimal
> > values for the platform, so we leave that fact as a DRM_ERROR for the
> > user to see.
> >
> > in 3.8-rc1 or look for a BIOS update.
>
> I have H61M/U3S3 motherboard and you latest BIOS ver 2.20 from 8/15/2012
> ftp://174.142.97.10/bios/1155/H61MU3S3(2.20)ROM.zip
> How to check problem persists or not?

The easiest way is to apply the patch and look for DRM_DEBUG_DRIVER messages. This is unlikely to fix the problem, but also can't hurt.

We've only assumed new BIOS will fix the problem, but who knows. Especially if it's a 3rd party BIOS.