Red Hat Bugzilla – Bug 1310347
Alsa, Radeon R9 270X: Sound crackling when using hw or hdmi output
Last modified: 2016-12-20 13:53:49 EST
Created attachment 1128840 [details]
lspci and dmesg dump
Description of problem:
I have a AMD Radeon R9 270X graphics card connected with HDMI to my surround receiver. When playing music the sound is crackling if the CPU has not got any load. If the CPU is under load, the music is fine. I know there are several reports about this around the internet, so it is not a new bug.
How reproducible: Very
Steps to Reproduce:
1. Use a Radeon R9 270X (Cape Verde/Pitcairn HDMI Audio) graphics card.
2. Let the CPU idle
3. aplay -D hw:HDMI,# test.wav
e.g aplay -D hw:HDMI,3 test.wav
Crackling sound output
Smoothly playing sounds/music.
A workaround is to use dmix, but I do not want to use it unless I need mixing
Created attachment 1128841 [details]
Very verbose lspci
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