[Bug 50721] CPU freqs stay stuck at max after reboot with on-demand governor set - i7-2630QM

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Thu Aug 14 01:23:03 PDT 2014


https://bugzilla.kernel.org/show_bug.cgi?id=50721

--- Comment #42 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to Lan Tianyu from comment #40)
> (In reply to rocko from comment #39)
> > FWIW, I have not seen this bug a single time since I added the delay between
> > i915 irq enable and modeset init. I also tried a 3.10-generic kernel
> > *without* the delay and it locked up the CPU frequencies on the very first
> > resume.
> > 
> > Perhaps it would be a good idea to add the delay as an interim workaround,
> > pending a proper resolution?
> 
> Hi,
> from this result, this is i915 issue and so reassign to intel-gfx category.
> Experts there will find the final solution.

Apparently we haven't. Does the problem persist with recent kernels?

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