From: Takashi Iwai <tiwai@suse.de>
To: Csaba Budai <ilyr73@gmail.com>
Cc: Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ALSA: hda/realtek: Fix ALC700 audio on Intel Hades Canyon
Date: Sun, 23 Aug 2026 10:50:54 +0200 [thread overview]
Message-ID: <87mrudw781.wl-tiwai@suse.de> (raw)
In-Reply-To: <20260821102514.11194-1-ilyr73@gmail.com>
On Fri, 21 Aug 2026 12:25:14 +0200,
Csaba Budai wrote:
>
> On Intel Hades Canyon systems with an ALC700 codec, analog audio can
> become unusable after rebooting from Windows into Linux.
>
> The affected system uses codec subsystem ID 8086:2073. In the broken
> state, Realtek coefficient 0x1b has value 0x4a4b. Setting bit 0x0400
> changes it to 0x4e4b and immediately restores normal analog playback.
>
> The BIOS also sets this bit after disabling and re-enabling onboard
> audio, while Windows may leave it cleared. Linux currently does not
> restore it during codec initialization.
>
> Add a machine-specific fixup for Intel Hades Canyon which sets only
> bit 0x0400 of coefficient 0x1b during HDA_FIXUP_ACT_INIT.
>
> The fix has been verified across Windows -> Linux reboots on an Intel
> NUC8i7HNB with an ALC700 codec.
>
> Signed-off-by: Csaba Budai <ilyr73@gmail.com>
Applied now. Thanks.
Takashi
prev parent reply other threads:[~2026-08-23 8:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-21 10:25 [PATCH] ALSA: hda/realtek: Fix ALC700 audio on Intel Hades Canyon Csaba Budai
2026-08-23 8:50 ` Takashi Iwai [this message]
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