https://bugs.kde.org/show_bug.cgi?id=501964
Bug ID: 501964
Summary: ALC4082 is always displayed as a stereo device, but it
can be set to "HiFi 5.1 Channels" or to 7.1
Classification: Applications
Product: systemsettings
Version: 6.3.1
Platform: unspecified
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: kcm_pulseaudio
Assignee: plasma-b...@kde.org
Reporter: kde-ae55haq...@kurzepost.de
Target Milestone: ---
***
The ALC4082 on my new mainboard (ASRock Phantom Gaming X870E Nova) is a USB
device. While I was researching this, I read many postings that seem to suggest
it is USB-only. It is display by the Sound chapter of System Settings as S/PDIF
Output, which is correct, the mainboard has no analog channels. It does have a
front stereo output / mic input, but I surmise this is implemented by some
other hardware.
When I set the device to "HiFi 5.1 Channels" or "HiFi 7.1 Channels" the gadget
always display two stereo channels. Which led me on a hunt for an entire Snark
*family* until I found the tip to use the command "speaker-test --channels 6
--test wav --nloops 1". This sent output to all channels, and I finally
understood that system settings was leading me astray.
I'm in the process of selecting a gaming linux, and I have four candidates on
my PC. This provided the unique opportunity to check three different base
distributions, Arch, Debian, and Fedora. All at their newest. And this bug was
present on all of them.
I normally run Kubuntu, but I only have Ubuntu Server installed on that PC. I
don't think that Kubuntu 24.10 will be any different, so I'm leaving it out.
***
SUMMARY
System Settings Sound should follow the number of channels set for a sound
device.
STEPS TO REPRODUCE
1. Obtain a PC with a ALC408x sound chip
2. Start System Settings
3. Open the Sound chapter
4. Set the ALC408x to 5.1 or 7.1.
5. See if you can test more than two channels.
OBSERVED RESULT
It is not possible to reach channels 3 to 5/7 or LFE.
EXPECTED RESULT
Should be.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.3.3
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
ADDITIONAL INFORMATION
Gaming Linuxes tested:
Garuda Dr460nized Gaming (Arch Rolling Release)
Nobara Linux 41 (Fedora)
CachyOS (Debian Rolling Release)
Bazzite 41 (FROM Fedora Kinoite)
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