no HDMI audio, no display with radeon.audio=1

[Alex Deucher]

On Sat, Aug 3, 2013 at 4:08 PM, Willem van Asperen
<willem at van.asperen.org> wrote:
> Hi All,
>
> I am running Archlinux (kernel 3.10.3) with ati driver 1:7.1, on an ASRock
> E350M1 Mini ITX board that has a Radeon HD 6310 on-board. (From the
> evergreen family, feature matrix shows "DONE" at HDMI audio). Further specs:
>
> processor: AMD Fusion E-350
> chipset: AMD A50M (Hudson-M1)
>
> Attached to the board is my TV set, via HDMI.
>
> Vanilla install works fine, except: no audio via HDMI.
>
> The standard alsa device is configured as card 0, device 0. But poking
> around (aplay -l, cat /proc/asound/cards) shows me this should be card 0,
> device 3. That's something that needs fixing. But
>
> mplayer -ao alsa:device=hw=0.3 <some file>
>
> returns no errors but I hear no sound...
>
> Reading the (excellent) arch wiki
> (https://wiki.archlinux.org/index.php/Radeon#HDMI_audio) I was recommended
> to add radeon.audio=1 to my kernel parameters. Without it, I see that I
> /sys/.../parameters/audio = 0. Setting the kernel parameter does flip this
> parameter into 1...
>
> But: as soon as the kernel loads with this parameter set, the screen goes
> blank with no signal detected by my TV. The system continues booting as per
> normal. Logging in through ssh and trying to play the same audio file: still
> no sound from my TV set. Switching the TV off and back on or unplugging and
> plugging back in (all this while mplayer runs), still no sound.
>
> Just for fun: also setting radeon.tv=0 as kernel parameter does not help.
> Same thing...
>
> When I run mplayer, nothing awkward shows up in journalctl -f
>
> Any clue as to what to try next?

You might be hitting the same issue as this bug:
https://bugzilla.kernel.org/show_bug.cgi?id=60687

Alex