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b=a4Q+mnVlVgSe/iaiq7jPuVAda8uJEeVo9JxGTJooaXexSP4sI1PgQfHNzqtZSm6u1kNb+G 4Gfx7RFgHHLt8+DQ== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 1813413432; Sun, 6 Sep 2026 08:12:56 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 6f9aBIggnWqdcwAAD6G6ig (envelope-from ); Sun, 06 Sep 2026 08:12:56 +0000 Date: Sun, 06 Sep 2026 10:12:55 +0200 Message-ID: <87fqzm4x2w.wl-tiwai@suse.de> From: Takashi Iwai To: Sebastian =?ISO-8859-1?Q?Dalfu=DF?= Cc: Jaroslav Kysela , Takashi Iwai , linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] ALSA: usb-audio: Add boot quirk for Behringer CM1A In-Reply-To: References: User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; 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DKIM_TRACE(0.00)[suse.de:+] X-Spam-Flag: NO X-Spam-Score: -3.51 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 Applied now. Thanks. Takashi