linux-kernel - [REGRESSION] Distorted sound on Acer Aspire A115-31 laptop

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <e142749b-7714-4733-9452-918fbe328c8f@gmail.com>
Date: Sun, 15 Dec 2024 15:06:38 +0200
From: Evgeny Kapun <abacabadabacaba@...il.com>
To: Linux Sound Mailing List <linux-sound@...r.kernel.org>
Cc: Kailang Yang <kailang@...ltek.com>, Takashi Iwai <tiwai@...e.de>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
 Linux Regressions Mailing List <regressions@...ts.linux.dev>,
 Linux Stable Mailing List <stable@...r.kernel.org>
Subject: [REGRESSION] Distorted sound on Acer Aspire A115-31 laptop

I am using an Acer Aspire A115-31 laptop. When running newer kernel 
versions, sound played through headphones is distorted, but when running 
older versions, it is not.

Kernel version: Linux version 6.12.5 (user@...tname) (gcc (Debian 
14.2.0-8) 14.2.0, GNU ld (GNU Binutils for Debian) 2.43.50.20241210) #1 
SMP PREEMPT_DYNAMIC Sun Dec 15 05:09:16 IST 2024
Operating System: Debian GNU/Linux trixie/sid

No special actions are needed to reproduce the issue. The sound is 
distorted all the time, and it doesn't depend on anything besides using 
an affected kernel version.

It seems to be caused by commit 34ab5bbc6e82214d7f7393eba26d164b303ebb4e 
(ALSA: hda/realtek - Add Headset Mic supported Acer NB platform). 
Indeed, if I remove the entry that this commit adds, the issue disappears.

lspci output for the device in question:

00:0e.0 Multimedia audio controller [0401]: Intel Corporation 
Celeron/Pentium Silver Processor High Definition Audio [8086:3198] (rev 06)
     Subsystem: Acer Incorporated [ALI] Device [1025:1360]
     Flags: bus master, fast devsel, latency 0, IRQ 130
     Memory at a1214000 (64-bit, non-prefetchable) [size=16K]
     Memory at a1000000 (64-bit, non-prefetchable) [size=1M]
     Capabilities: [50] Power Management version 3
     Capabilities: [80] Vendor Specific Information: Len=14 <?>
     Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
     Capabilities: [70] Express Root Complex Integrated Endpoint, 
IntMsgNum 0
     Kernel driver in use: snd_hda_intel
     Kernel modules: snd_hda_intel, snd_soc_avs, snd_sof_pci_intel_apl