[Bug 105962] [KBL] "enable_rc6" parameter deprecation brings back freezing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105962

--- Comment #8 from Filip <tyx027 at gmail.com> ---
Update: a freeze did unfortunately occur with c-states limited. The other user
from the forum also mentioned he tested this before and had the same outcome. 

Journalctl doesn't show anything out of the ordinary. i915 was just switching
DC states from 00 to 02 and vice versa, the last one it switched to being 00.
What may be interesting is that i915 had been quiet for 14 seconds prior to the
freeze, while it usually does something every two seconds. This also happened
before in the session, however, and with no freeze. Due to some obstacles, I
had not gotten to setting up something to obtain a log while the machine is
frozen, but I will see what I can do.

The other user's comment on logging, however, is: "You will don't find any logs
related that freeze. Even not with kernels netconsole or any debugging
parameters.  I've spend many time to that issue and find nothing"

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