Public bug reported:
I made Sonnet make a description of what we tried to solve together so I
can paste it here because I'm not an expert. I just wanted to tell you
that I'm not an AI and I hope that it helps. Thanks for your work
anyways
1) Ubuntu Release:
Description: Ubuntu 24.04.4 LTS
Release: 24.04
2) Package version:
linux-image-6.8.0-124-generic: 6.8.0-124.124
3) What you expected to happen:
Plugging a TRRS headset into the 3.5mm combo jack should automatically detect
both the headphone output and the headset microphone, making it available as
an input source in sound settings.
4) What happened instead:
Only the headphone output is detected. The microphone input does not appear
in Settings → Sound → Input. The input port shows "availability unknown"
in PipeWire. A manual workaround is required:
echo "options snd-hda-intel model=alc295,dell-headset-multi" | sudo
tee /etc/modprobe.d/alsa-base.conf
This needs to be applied after every fresh install and is not documented
anywhere,
making it a poor experience for users of this laptop model (Acer Predator
PT315-53,
Realtek ALC295, Subsystem ID: 0x10251540).
== Problem ==
When a 3.5mm TRRS headset is plugged into the combo jack, the microphone
is not detected. Only the headphone output works. The input source shows
"availability unknown" and no headset mic port appears in PipeWire/PulseAudio.
== Workaround ==
Adding the following to /etc/modprobe.d/alsa-base.conf fixes the issue:
options snd-hda-intel model=alc295,dell-headset-multi
After reboot, the headset microphone is detected and works correctly.
== Expected fix ==
Add a SND_PCI_QUIRK entry for this subsystem ID in
sound/pci/hda/patch_realtek.c so the workaround is applied automatically:
SND_PCI_QUIRK(0x1025, 0x1540, "Acer Predator PT315-53",
ALC295_FIXUP_DELL_HEADSET_MULTI),
Similar fixes have already been merged for other Acer models (Nitro 5, Helios
300)
with the same ALC295 codec.
== Steps to reproduce ==
1. Boot Ubuntu 24.04 on Acer Predator PT315-53
2. Plug in a TRRS headset to the 3.5mm combo jack
3. Check Settings → Sound → Input — microphone is not listed
4. Run: pactl list sources — only "analog-input-mic" with "availability unknown"
Thank you
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2155775
Title:
ALC295 headset microphone not detected on Acer Predator PT315-53. I
tried a workaround but it sound terribles anyways
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