(In reply to erasmocaponio from comment #55) > (In reply to wurs10 from comment #53) > Confirming wurs10's COEF-based fix (comment of 2026-07-17) on a different > machine in the same HP Pavilion All-in-One family. I used Opus 5 to help me > with that (it is really incredible to have audio on this pc with linux after > three years thanks to AI) > > HARDWARE > - HP Pavilion All-in-One Desktop 32-b0xxx > - CPU: Intel Core i7-12700T (Alder Lake-S) > - Codec: Realtek ALC274, Vendor Id 0x10ec0274 > - Codec subsystem Id: 0x103c892c > - PCI subsystem Id: 103c:XXXX <-- FILL IN from `lspci -nn -d ::0403` > - Card: HDA Intel PCH, device 0: ALC274 Analog. No HDMI/DP playback device > is exposed at all. > - OS: Manjaro Linux, kernel 7.2.0-1-MANJARO, KDE Plasma 6.7.4 on Wayland, > PipeWire > - Driver: snd_hda_intel > > SYMPTOM (before fix) > Identical to the existing reports. aplay -l lists the ALC274 analog device; > speaker-test runs to completion with no error and no audible output; ALSA > mixer shows Master and Speaker unmuted at 97-100%; Auto-Mute Mode is > Disabled. No sound from the internal speakers under any configuration. > > TRIED WITHOUT SUCCESS FIRST > - options snd-hda-intel model=alc274-dell-aio > - options snd-hda-intel model=alc285-hp-amp-init > - options snd-hda-intel model=auto > > WHAT WORKED > The four vendor COEF writes on NID 0x20 from wurs10's report, transferred > UNCHANGED to this board: > > hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x26 > hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x5757 > hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x10 > hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0xc580 > hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x0b > hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x7778 > hda-verb /dev/snd/hwC0D0 0x20 SET_COEF_INDEX 0x6b > hda-verb /dev/snd/hwC0D0 0x20 SET_PROC_COEF 0x0060 > > followed by the pin/amp enablement on 0x17 and 0x21 and the mixer unmute > steps exactly as given in that report. Sound appeared immediately, during > active playback, at the moment the sequence completed. > > NOTES SPECIFIC TO THIS MACHINE > - The four coefficient values required no adjustment for this subsystem ID. > - The fifth coefficient (index 0x62 -> 0xa007), flagged as uncertain in > wurs10's report, was NOT applied here and is not required on this board. > This is consistent with the finding on 0x103c89e9. > - Manjaro ships power_save=10 by default for snd-hda-intel. Set to 0 via > /etc/modprobe.d/99-alc274-hp.conf, as recommended in the original report. > - Made persistent with a systemd oneshot service (Type=oneshot, > After=sound.target) running the verb sequence plus mixer unmute. Confirmed > surviving a full cold boot with no manual intervention. > - Headphone jack: [not tested]
I can confirm that this works on the HP AIO 32-b0254. Headphone jack works as advertised as well. Thanks for this solution! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1982483 Title: No sound from built-in speakers HP Pavilion All-in-One Desktop 27-ca1xxx (ALC274) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1982483/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
