From: Takashi Iwai <tiwai@suse.de>
To: "Sebastian Dalfuß" <sd@sedf.de>
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: usb-audio: Add boot quirk for Behringer CM1A
Date: Sun, 06 Sep 2026 10:12:55 +0200 [thread overview]
Message-ID: <87fqzm4x2w.wl-tiwai@suse.de> (raw)
In-Reply-To: <apwG4DRfNyvmRzyb@sedf.de>
On Sat, 05 Sep 2026 14:11:12 +0200,
Sebastian Dalfuß wrote:
>
> After a power cycle and reenumeration, the Behringer CM1A* leaves its
> MIDI endpoint inoperative. USB enumeration and driver binding
> complete successfully, but MIDI outputs remain pending.
>
> A GET_DESCRIPTOR request for the device descriptor, issued after USB
> configuration, makes the endpoint operational. Add a one time boot quirk
> to perform that request before ALSA initializes the device.
>
> *
> ID 1397:1234 BEHRINGER International GmbH CM1A
>
> Signed-off-by: Sebastian Dalfuß <sd@sedf.de>
Applied now. Thanks.
Takashi
prev parent reply other threads:[~2026-09-06 8:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-05 12:11 Sebastian Dalfuß
2026-09-06 8:12 ` Takashi Iwai [this message]
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