| 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 [details] 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.
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