[pulseaudio-tickets] [PulseAudio] #793: volume reset when device plugged if set over the base level

[PulseAudio]

#793: volume reset when device plugged if set over the base level
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  Reporter:  kiddo   |       Owner:  lennart
      Type:  defect  |      Status:  new    
 Milestone:          |   Component:  daemon 
Resolution:          |    Keywords:         
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Comment(by tjwhaynes):

 Another data point.

 I have a Total Bithead USB sound card attached to my laptop to drive my
 headphones.

 lsusb shows it as
  Bus 001 Device 012: ID 08bb:2900 Texas Instruments Japan PCM2900 Audio
 Codec

 Typically I leave the volume maxed out (100%) in PulseAudio and use the
 dial on the BitHead to control the volume. I use the PulseAudio Volume
 Control for all adjustments. I use QuodLibet for playback of music.

 Now - some experiments. The laptop (Thinkpad T60p) has an internal audio
 card. I'll set that to 100% under "Output Devices" for clarity. The
 PCM2900 is attached to the dock for the laptop. That is also set to 100%
 under "Output Devices". QuodLibet appears under "Playback" at 100%.

 If I unplug the Bithead, playback of sounds flips over the internal audio
 card. The volumes for the Internal Audio and QuodLibet remain unchanged.

 Plug the Bithead back in and the Volume for the Internal Audio under
 "Output Devices" drops to 25%. The volume for the Bithead remains at 100%.
 Under the "Playback" tab, the volume for QuodLibet now reads 25%.

 This is where it gets confusing. While a song remains playing in
 QuodLibet, the volume through the headphones remains unchanged. When the
 song changes, the volume of music heard does drop to 25%.

-- 
Ticket URL: <http://pulseaudio.org/ticket/793#comment:3>
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