https://bugs.kde.org/show_bug.cgi?id=484372

            Bug ID: 484372
           Summary: Automatically switch playback device between external
                    device and laptop on connect/disconnect
    Classification: I don't know
           Product: kde
           Version: unspecified
          Platform: Arch Linux
                OS: Linux
            Status: REPORTED
          Severity: wishlist
          Priority: NOR
         Component: general
          Assignee: unassigned-b...@kde.org
          Reporter: filip.kend...@gmail.com
  Target Milestone: ---

SUMMARY
When laptop is connected to an external display with playback device to the one
in the external display and we disconnect the external display, playback device
gets disabled and hidden behind the "Show Inactive Devices" toggle. 

Can we, upon disconnection, change the playback device back to laptop? And in
addition, remember the configuration between that external display and laptop
so next time, if the playback device was the external display, change the
playback automatically when that external display is connected to a laptop. or
otherwise, keep the playback device on laptop.

I tested this with my work Macbook, and it works as I suggested. I'm not sure
how windows laptops handle this.
I don't know how feasible this is. Please feel free to close this as Won't do
if you want. Thank you.

STEPS TO REPRODUCE
1. Connect laptop to an external display (monitor or TV)
2. Change playback device to Digital Stereo (HDMI) output
3. Disconnect external display from laptop
4. Open Sound page in System Settings

OBSERVED RESULT
Playback device didn't switch back to laptop audio. Playback device is hidden
behind the "Show Inactive Devices" toggle.
Note: Took me a long time to notice the toggle, I initially wanted to report a
bug because I couldn't change the playback device after disconnecting the
external display, but I just didn't see it was hidden.

EXPECTED RESULT
Upon disconnecting external display from the laptop do the following:
1. Set laptop audio as playback device
2. Remember the playback audio configuration between laptop/external display
(Maybe not here, but somewhere)
    a) If playback audio was set to the external display, automatically switch
to it when it's connected to laptop next time
    b) If playback audio was set to laptop, keep laptop audio when they're
connected next time

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.8.1-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i5-7300HQ CPU @ 2.50GHz
Memory: 7.6 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 630
Manufacturer: ASUSTeK COMPUTER INC.
Product Name: X580VD
System Version: 1.0

ADDITIONAL INFORMATION

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