RE: [REGRESSION] Distorted sound on Acer Aspire A115-31 laptop

[Kailang <kailang@realtek.com>]

Please also do it on older kernel.

> -----Original Message-----
> From: Evgeny Kapun <abacabadabacaba@gmail.com>
> Sent: Sunday, December 15, 2024 9:07 PM
> To: Linux Sound Mailing List <linux-sound@vger.kernel.org>
> Cc: Kailang <kailang@realtek.com>; Takashi Iwai <tiwai@suse.de>; Linux
> Kernel Mailing List <linux-kernel@vger.kernel.org>; Linux Regressions Mailing
> List <regressions@lists.linux.dev>; Linux Stable Mailing List
> <stable@vger.kernel.org>
> Subject: [REGRESSION] Distorted sound on Acer Aspire A115-31 laptop
> 
> 
> External mail.
> 
> 
> 
> 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@hostname) (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