linux-kernel - Re: i915: RC6 causes sudden shutdowns

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 30 Nov 2011 22:39:32 +0100
From:	Patrik Kullman <patrik.kullman@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: i915: RC6 causes sudden shutdowns

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@...il.com>:
> 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?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/