[Bug 76103] [915GM regression] black screen on boot Linux >= 3.14-rc1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76103

--- Comment #13 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
Nothing in the X log AFAICS. The watermarks are still the same there. Maybe
something X is doing prevents C3 entry.

Can you run powertop after boot, and then while X is running and see if the CPU
enters C3 state in each case?

I'm thinking maybe the automagic max FIFO mode doesn't work on i915gm we'd need
to manually repartition the FIFO...

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