21 Apr
2015
21 Apr
'15
9:58 a.m.
2015-04-19 19:26 GMT+02:00 Gabriele Mazzotta gabriele.mzt@gmail.com:
Hi,
I've recently found that commit a551d91473 ("ALSA: hda - Use regmap for command verb caches, too") is somehow causing a pop noise on startup when headphones are plugged in, but I couldn't figure out the exact cause. Was this observed on other systems (mine is a Dell XPS13 9333, Realtek ALC3661)? Does anyone have any idea of what the cause might be?
Small update: I found that if I add a printk in alc_shutup_dell_xps13() or I increase the delay from 20ms to 200ms, I get the pop noise on start, with or without a551d91473 reverted. I will try to find out what this delay is exactly affecting.