[alsa-devel] How to show hda trace events in a self-built kernel?
mengdong.lin at intel.com
Wed Apr 23 09:35:04 CEST 2014
How to show hda trace events in a self-built kernel?
With a self-built kernel under Ubuntu 13.04 or 13.10, I enabled hda trace events by
#echo 1 > events/hda/enable
#echo 1 > events/had_intel/enable
Then I check the codec proc entry and run "cat trace". But I got no output of the hda trace events.
But I switch to the original kernel in Ubuntu 13.04 or 13.10 and repeat the above steps, I can get the output of hda trace events.
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