At Tue, 26 May 2015 21:39:22 -0400, Adam Goode wrote:
Linux 4.0.2-300.fc22.x86_64
Hi,
I have the Scarlett 18i8 USB device that is supported by the new scarlett_mixer.c code. I am happy to say that the mixer code works in most cases. But under some conditions, I cannot get any sound out of the device until I go and toggle the "Matrix 01 Input" and "Matrix 02 Input" enums up and then down (from PCM 1 and PCM 2). This appears to me to be some kind of cache invalidation bug, where the device is out of sync with kernel mixer state.
I will take a look at the code myself at some point, but not for a while. But I am happy to try patches if anyone comes up with anything in the mean time.
Does it happen after some S3/S4 or even during a normal operation without power-saving? The USB-audio device supports autopm, so this needs to be checked, too.
Takashi