Signalling no-audio for HDMI

[Hendrik S. <po...@he...>]

Hi,

I got this working previously but it somehow stopped working.

My setup:
- Acer TravelMate 6592
- DVI output with DVI->HDMI converter
- Philips Full-HD LCD-TV

The laptop runs Debian testing with a self-compiled linux-2.6.33 with 
radeon+firmware compiled-in.

The laptop cannot do audio over the HDMI line, I use a seperate stereo cable 
for this. This is the proposed way from the TV manual when audio-over-hdmi is 
not possible.
And that used to work just fine (at the time of 2.6.33-rc8, I wrote to this 
list at that time) but fails with latest version of libdrm (2.4.18) and 
xserver-xorg-vide-radeon (6.12.192 + patches up to git 5c256808, the current 
Debian package).

I use the following kernel command line:
radeon.modeset=1 radeon.audio=0 radeon.dynclks=1

Especially, audio=0 signals the TV that the audio comes over the seperate 
cable. This is what was working and is not working anymore.

Strangely, the available resolutions changed: the old drivers didn't find the 
1080p resolutions when the TV was connected while X was running. This is now 
working with even more refresh rates (50/60/24). There was also a resolution 
of 1366x768 which is not in the list anymore, only 1360x765.

Working combination (but DRI disabled due to massive instabilities):
linux-2.6.33-rc8, libdrm-2.4.16, radeon from git20101011

Not working:
linux-2.6.33, libdrm-2.4.18, radeon-6.12.192

Any ideas?

Thanks,

HS

PS: Please CC me on answers, I am not subscribed