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Underruns while pausing/resuming HDMI playback on GLK #761
Description
Description
Rapidly pausing and releasing playback over HDMI will cause underruns on GLK. What is interesting to me is that we don't see any errors in dmesg or sof-logger, only from aplay window. Please try to reproduce the issue and check if you can gather more meaningful logs.
Recipe
ChromeOS
75.0.3746.0 (Platform 12000.0.0)
Kernel
https://github.com/thesofproject/linux/tree/topic/cros-sof-v4.14-rebase
d4d2c3b
FW and TPLG
https://github.com/thesofproject/sof/commits/master
a10e69d
sof-glk-da-7219.tplg
Reproduction steps
- Connect platform to monitor with HDMI
- aplay -D hw:0,6 test.wav -i
- Keep pressing space rapidly (or hold it) to pause and release playback
Activity
xiulipan commentedon Apr 1, 2019
@wwittbrx
If you see some xrun in the terminal, then it is some issue cased by ALSA.
Please reference from thesofproject/sof#231 thesofproject/sof#506
This is some ALSA warning and ALSA handling when some XRUN happen to the buffer that controlled by ALSA. This should be caused by user space memory to kernel space memory copy issue.
You can try to reproduce it without pause/resuem but by some debug injection:
thesofproject/sof#506 (comment)
mengdonglin commentedon Apr 3, 2019
@wwittbrx Close the issue based on above comments. Will reopen if this impact audio quality in the future
net: pktgen: fix code style (WARNING: Missing a blank line after decl…