i915: occasional hangs on Baytrail with deeper C-states

[Daniel Bilik]

On Wed, 2 Mar 2016 17:06:47 +0100
Daniel Bilik <ddb at neosystem.org> wrote:

> I'm experiencing occasional freezes running DragonFly desktop on a
> Baytrail system (namely Intel Celeron J1900) with machdep.mwait.CX.idle
> set to AUTODEEP (which enables C6 and C7 on this system). Limiting it to
> C1/1 makes the system stable.

Reading through discussion on kernel.org, it seems there are some news
here...

First, the bug seems to affect not only Baytrail, there is a fresh report
from Skylake user:

https://bugzilla.kernel.org/show_bug.cgi?id=109051#c139

And second, there is a pointer to a "solution candidate". One user
has reported that using kernel "drm-intel-next" has solved stability
issues for him:

https://bugzilla.kernel.org/show_bug.cgi?id=109051#c120

--
						Dan