I can confirm the issue. It is easy to reproduce on my system, which has
an intel chipset and graphics card with analog and HDMI output. PA shows
a single "Built-in Audio device".
- Start pavucontrol
- Make sure the current output profile (in the configuration tab) is "Analog
Stereo Duplex" and kmix correctly configures this channel
- Now change the profile to some HDMI profile
- Observation: The KMix icon in the systray changes to the icon shown for
unknown files (as if the icon loader failed to load it?), and the +/- volume
keys have no effect. The playback devices show a single device, changing volume
here works fine.
- In KMix choose settings - select master channel. One device is presented
("Built-in HDMI..."), but no radio button is selected
- Select the only device
- Now the systray icon is correct again, and the +/- volume keys work
The same happens when changing the profile back to "Analog Stereo
Duplex".
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https://bugs.launchpad.net/bugs/619194
Title:
Select main channel in KMix didn't work as expected
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