Bug 1312669 - Scarlett 18i8 shut off because "Playback switch set to off"
Scarlett 18i8 shut off because "Playback switch set to off"
Product: Fedora
Classification: Fedora
Component: alsa-lib (Show other bugs)
x86_64 Linux
unspecified Severity unspecified
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Assigned To: Jaroslav Kysela
Fedora Extras Quality Assurance
Depends On:
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Reported: 2016-02-28 11:42 EST by ycollet
Modified: 2016-12-20 14:05 EST (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2016-12-20 14:05:16 EST
Type: Bug
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Description ycollet 2016-02-28 11:42:55 EST
I use a Scarlett 18i8 usb audio card on fedora 23 64 bits.
When I connect the sound card on jack, I have an input level (the audio meter on guitarix react to the audio level) but no output.

I have digged a lot and found that a alsa "Playback switch" was set to off automatically:

$ amixer --card 2 contents | more
numid=5,iface=MIXER,name='Master 1 (Monitor) Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=off,off
numid=6,iface=MIXER,name='Master 1 (Monitor) Playback Volume'
  ; type=INTEGER,access=rw---R--,values=2,min=0,max=134,step=1
  : values=128,128
  | dBscale-min=-1

If I set it to true:

$ amixer --card 2 cset numid=5 1
numid=5,iface=MIXER,name='Master 1 (Monitor) Playback Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on

And save the state of the card:

$ sudo alsactl store 2

Now, I found again my audio output. And it works again after a reboot.

Somewhere alsa has stored this wrong value of switch to off.
So, I think there is a bug in the way this flag is saved.
Comment 1 Fedora End Of Life 2016-11-24 10:48:59 EST
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Comment 2 Fedora End Of Life 2016-12-20 14:05:16 EST
Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is
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