[Bug 88563] [HSW][i915][HD 4600] GPU preventing package state from fully reaching PC6

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88563

--- Comment #2 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
I'm guess lack of FBC is a factor. Try i915.enable_fbc=1. But be warned that
fbc is still broken AFAIK, so you might get missing screen updates or lockups
etc.

For working FBC you may want to check out my branch here:
https://gitorious.org/vsyrjala/linux.git  fbc_update_thing_14
But the branch is rather old, and doesn't seem anything from there will ever
get merged, so it's a bit of dead end at this point. I'm still running that on
my IVB laptop simply because I want working FBC and doesn't look like upstream
is getting there any time soon.

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