Re: Force-enabling a video mode breaks HDMI audio on Intel DG45FC

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On Tue, June 1, 2010 16:07, Wu Fengguang wrote:
> You are dropped from the CC list due to your follow-up-to header.
> Are you adding it on purpose?

mutt adds it, probably because it knows (or guesses) that I'm subscribed
to alsa-user. I'll check later...

> On Mon, May 31, 2010 at 10:06:23AM +0800, Zhenyu Wang wrote:
>> yeah, I think that won't setup the audio enable bit on HDMI port
>> properly,
>> as drm/i915 driver checks EDID block for real HDMI sink device, and only
>> in that case it will enable audio, ignore other case like DVI.
>
> Maybe could allow users to manually set/unset that bit.
>
> David, you may check the intel_audio_dump tool in
>
>         git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
>
> It will show whether your SDVO_AUDIO_ENABLE bit is set (grep for
> "Audio_Output_Enable" or "audio enabled").
>
> If unset, you can trivially set the bit with
> intel_reg_read/intel_reg_write.
> (I'm not sure if this will magically make audio work though.)
>

I'll test and get back to you.

-- 
David Härdeman


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