[Bug 74861] [hsw] Fast audio playback on Intel Haswell HDMI due to runtime pm

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=74861

--- Comment #8 from Takashi Iwai <tiwai at suse.de> ---
(In reply to Peter Curtis from comment #7)
> (In reply to Takashi Iwai from comment #5)
> 
> > Is the problem always seen unless i915.disable_power_well=0 is passed?  For
> > example, if you replug HDMI and play on your TV (I suppose it's no extra
> > receiver), does the problem remain?
> Yes

OK, and you're *not* using Nvidia binary-only driver, right?

> > Then, check whether the audio side is really properly configured.   At
> > least, /proc/asound/card*/eld#* file should show that the monitor is
> > connected and ELD is valid.
> /proc/asound/HDMI/eld#0.2 contains
> monitor_present		1
> eld_valid		0

This is the reason of the wrong speed.  The audio driver isn't informed how to
set up the channels.

> > If it's properly connected, the next thing to check is
> > /sys/kernel/debug/dri/64/i915/i915_power_domain.  What entries are enabled
> > there.
> Lots of files in folder but not one of that name

Are you testing with the latest Linus tree (or 3.15-rc7)?

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