Re: i915: RC6 causes sudden shutdowns

[Patrik Kullman]

So is this being worked on already?

It would be wonderful to get this fixed since it gives additional
hours of battery life, but it's currently unusable for my this
machine.

2011/11/24 Patrik Kullman <patrik.kullman@xxxxxxxxx>:
> Hi,
>
> I recently acquired the Asus Zenbook UX31E but have been looking for
> ways to extend the battery life.
>
> I read that the i915_enable_rc6 parameter could decrease power usage
> significantly and tried it with the 3.1.1 and 3.1.2 kernels, and
> indeed it does.
> However, I (and the other Zenbook-owners from the Ubuntu forums)
> experience sudden, unexpected shutdowns (for me, 1-4 times per day)
> with this parameter.
> It's as sudden as a power loss.
>
> It happens both when pcie_aspm=force is supplied and when it's not.
> What also is a bit concerning is that I read that RC6 is going to be
> enabled by default from 3.2 onward?
>
> How would we go about troubleshooting this?
>
> Or is the only option to blacklist the machine from RC6 if it doesn't
> work as is?
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