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ATI DRM HDMI fast audio playback
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BiFkun
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PostPosted: Thu Oct 24, 2013 10:44 pm    Post subject: ATI DRM HDMI fast audio playback Reply with quote

Hello everyone!
I have a problem with sound over HDMI with DRM driver.
Any audio plays 2x or 3x speed and choppy(like it played piece of sound from buffer and wait new).
I can't google for it anymore, everywhere problems only with video or no sound.
Therefore here is my specs:
MSI Radeon HD4850 (DVI to HDMI adapter out of the box);
Kernel 3.11.3;
Mesa latest(FireBurn overlay);
PulseAudio.

Alsamixer shows only SPDIF for ATI HDMI device.
Any suggestions, please?
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BiFkun
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PostPosted: Sat Oct 26, 2013 5:32 pm    Post subject: Reply with quote

I rebuilt world without pulseaudio USE flag, problem still persists.
So I rebuilt it back.
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BiFkun
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PostPosted: Sun Nov 10, 2013 11:58 am    Post subject: Reply with quote

Bump, I can't find anything on this problem
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BiFkun
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PostPosted: Sun Nov 17, 2013 12:21 pm    Post subject: Reply with quote

Progressing.
Changed multimedia backend from phonon-gstreamer to phonon-vlc, now sound is choppy (via HDMI)
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Logicien
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Location: Montréal

PostPosted: Sun Nov 17, 2013 12:44 pm    Post subject: Reply with quote

Have you activate the audio radeon kernel module parameter option in the kernel command line for Radeon compiled in the kernel or in a conf file in /etc/modprobe.d/ directory for Radeon support in module:
Code:
radeon.audio=1
options radeon audio=1

I tried to activate sound over Hdmi with Radeon free driver support. Like you Alamixer was only showing Spdif for Hdmi and I never been able to ear any sound from Hdmi.

I read that we must use Ati driver fglrx for that because the free Radeon driver audio support is limited. Have better information by your own search.
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BiFkun
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PostPosted: Sun Nov 17, 2013 1:05 pm    Post subject: Reply with quote

Logicien wrote:
Have you activate the audio radeon kernel module parameter option in the kernel command line for Radeon compiled in the kernel or in a conf file in /etc/modprobe.d/ directory for Radeon support in module:
Code:
radeon.audio=1
options radeon audio=1

I tried to activate sound over Hdmi with Radeon free driver support. Like you Alamixer was only showing Spdif for Hdmi and I never been able to ear any sound from Hdmi.

I read that we must use Ati driver fglrx for that because the free Radeon driver audio support is limited. Have better information by your own search.

I have built-in kernel driver and passing radeon.audio=1 via grub command line.
As you see: sound is works, but pretty bad.
Searching for my own tells me that having only SPDIF out in alsamixer is OK.
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Logicien
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Location: Montréal

PostPosted: Sun Nov 17, 2013 4:04 pm    Post subject: Reply with quote

Could your DVI to HDMI conversion be a cause of your sound problem? Have you try DVI to DVI or HDMI to HDMI if you can? This idea just come to pass through my mind.

:D
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BiFkun
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PostPosted: Wed Dec 11, 2013 8:20 pm    Post subject: Reply with quote

Okay! This time it all wraps up: I booted LiveDVD Calculate Linux with radeon.audio=1 option, and it is works there!
So, this is not a hardware problem. Need to look deeper into system...
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