[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 #28 from paulz <freedesktop.org at nospam.mooo.com> ---
(In reply to Imre Deak from comment #17)
> (In reply to paulz from comment #13)
> > [...]
> > > I'm guessing the DC state toggling is due to GPU activity, probably due to
> > > updating the clock in your GUI. Could you try preventing these updates (and
> > > any other GPU activity) for instance by switching away to another VT from
> > > your GUI and seeing if the freeze still happens?
> > switching away to another VT is NOT possible, its the whole PC that freeze!
> > Even SysRq don't work, keyboard is also dead
> 
> I meant here to switch to another VT from the GUI before the freeze to avoid
> any GPU activity (it looks like it is the periodic clock update based on
> your later logs) and see if the freeze still happens.

confirmed! no freeze on other VT (bash shell) since >36 hours without setting
i915.enable_rc6=0

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