[alsa-devel] [PATCH v3 0/5] ALSA: hda - hdmi: ATI/AMD multi-channel and HBR support

[James Le Cuirot]

On Mon, 25 Nov 2013 15:20:23 +0200
Anssi Hannula <anssi.hannula at iki.fi> wrote:

> 24.11.2013 16:57, James Le Cuirot kirjoitti:
> > On Sat, 23 Nov 2013 17:45:00 +0200
> > Anssi Hannula <anssi.hannula at iki.fi> wrote:
> > 
> >> 23.11.2013 17:40, James Le Cuirot kirjoitti:
> >>> On Sat, 23 Nov 2013 03:29:28 +0200
> >>> Anssi Hannula <anssi.hannula at iki.fi> wrote:
> >>>
> >>>> 23.11.2013 03:05, James Le Cuirot kirjoitti:
> >>>>> Anssi Hannula <anssi.hannula <at> iki.fi> writes:
> >>>>>
> >>>>>> Here's another revision of the ATI/AMD multichannel+HBR
> >>>>>> patchset.
> >>>>>
> >>>>> Hi Anssi. Many thanks for your work on this. I am very keen to
> >>>>> test this new code but have so far been unsuccessful. I have a
> >>>>> Radeon 4670 (Sapphire branded) connected to a Yamaha RX-V773. I
> >>>>> am running the sound/for-next kernel (82755ab) with your
> >>>>> "missing PCM SAD" patch applied.
> >>>>>
> >>>>> The new kernel has allowed ALSA to recognise the card as
> >>>>> multichannel and I can issue the following speaker-test command
> >>>>> but I still only hear "Front Left" and "Front Right" and the
> >>>>> Yahama seems to report the signal as stereo.
> >>>>>
> >>>>> # speaker-test -Dhdmi:CARD=HDMI,DEV=0 -c6 -t wav
> >>>
> >>>
> >>>> ELD stuff is not necessary for playback, it is mostly for
> >>>> information (and providing the necessary info for ELD is disabled
> >>>> on radeon DRI drivers on some kernels on some GPUs ATM due to
> >>>> some issues).
> >>>>
> >>>> Is there anything interesting in "dmesg"?
> >>>
> >>> I have attached my dmesg. I enabled ALSA debug and verbose printk
> >>> but disabled the on-board HDA audio in the BIOS to make it less
> >>> confusing, and also to see if it made any difference, which it
> >>> didn't. The only entry I find noteworthy is about the ELD but you
> >>> say this isn't required.
> > 
> > https://gist.github.com/chewi/7628058
> 
> Unfortunately everything looks OK.

I had a horrible feeling you'd say that.

> Do you have any custom configuration in /etc/asound.conf or
> ~/.asoundrc?

Just the usual PulseAudio overrides. I don't like PA starting
automatically so I have that disabled and run speaker-test without it.
I think the -D option bypasses it anyway. I have also run speaker-test
through PA just to see and get the same result.

> To narrow it down a bit, are you able to test any of the following:
> - same card on Windows,
> - same card on fglrx,
> - same receiver with a different AMD card,
> - same receiver with an Intel/NVIDIA card?

I banished real Windows installs from my main desktop after a nasty
incident some years ago. ;) I might be able to dedicate the card to a
QEMU instance but I've never tried that before.

I could easily try fglrx but I thought it didn't support multichannel?
Or this new ALSA code fixes that too?

Unfortunately I don't have any other AMD cards handy. I could try my
wife's Ivy Bridge based laptop though.

I'll report back soon.

Regards,
James