https://bugs.freedesktop.org/show_bug.cgi?id=77677
Priority: medium Bug ID: 77677 Assignee: dri-devel@lists.freedesktop.org Summary: HDMI audio on ati7750 choppy with ALSA multi-channel apps Severity: normal Classification: Unclassified OS: Linux (All) Reporter: socalfisher@gmail.com Hardware: x86-64 (AMD64) Status: NEW Version: unspecified Component: DRM/Radeon Product: DRI
Created attachment 97618 --> https://bugs.freedesktop.org/attachment.cgi?id=97618&action=edit Alsa No Pulseaudio xorg.0.log dmesg aplayL/l codec logs
I am having issues playing sounds over HDMI stereo directly to TV. I am using XBMC.
When Pulse Audio is installed the sounds play fine in stereo. When I try a pure alsa installation (no pulse audio) there is severe distortion. Pure ALSA is needed for applications that only support ALSA, and for HDMI pass-through.
My dedicated Radeon 7750 card only outputs cyclical sounds, quiet voices like wrong channel, and echos. Setup PC to TV directly HDMI (2.0 audio selected). I have had the same issue when cpu was an AMD 955BE, and now Intel i7 4770.
Windows 7 plays hdmi audio just fine on the same exact PC/Panasonic plasma/setup.
1) speaker-test -l 4 -c 2 -r 48000 -D hw:1,3 plays choppy sounds with or without pulse installed.
2) aplay -D plughw:1,3 /usr/share/sounds/alsa/Front_Center.wav plays fine
Using an A4-3400 HDMI plays perfectly fine on the same TV. As does my Zotac AQ01.
Not sure if this is related (http://ubuntuforums.org/showthread.php?t=2207698): SND_PCM_ACCESS_RW_INTERLEAVED vs. SND_PCM_ACCESS_MMAP_INTERLEAVED
I believe XBMC uses SND_PCM_ACCESS_RW_INTERLEAVED for ALSA.
Thanks in advance.