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Fri, 04 Jul 2025 05:45:17 -0700 (PDT) Received: from geday ([2804:7f2:8082:5254::1]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4a994a3093asm13390891cf.36.2025.07.04.05.45.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Jul 2025 05:45:17 -0700 (PDT) Date: Fri, 4 Jul 2025 09:45:13 -0300 From: Geraldo Nascimento To: Brian Knutsson Cc: alsa-devel@alsa-project.org Subject: Re: [BUG] Mackie DLZ Creator =?utf-8?Q?XS_?= =?utf-8?B?4oCT?= USB Audio: write error -77 after accepted hw_params Message-ID: References: <1751030777207.7.27394@webmail-backend-production-84fcdc845b-7rcsr> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1751030777207.7.27394@webmail-backend-production-84fcdc845b-7rcsr> Message-ID-Hash: SGVFDSQ5IEQUNM5ZMUGV5IRL7UWFOJC7 X-Message-ID-Hash: SGVFDSQ5IEQUNM5ZMUGV5IRL7UWFOJC7 X-MailFrom: geraldogabriel@gmail.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.9 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On Fri, Jun 27, 2025 at 03:26:17PM +0200, Brian Knutsson wrote: > > Hi ALSA devs, > > I'm reporting an issue with the Mackie DLZ Creator XS USB audio device on Linux (tested on Ubuntu 24.04 and 25.05 with kernel 6.8+). > > The device is detected correctly via ALSA (card 2: XS), but as soon as playback is initiated – whether via `aplay` or `speaker-test` – it disconnects with `write error: -77, File descriptor in bad state`. > > Relevant kernel logs show: > usb 3-7: Product: DLZ Creator XS > usb 3-7: Manufacturer: LOUD Audio, LLC > usb 3-7: USB disconnect, device number X > > This occurs with and without PipeWire/udev running. > > I’ve created a full ALSA log with `alsa-info` and opened a Kernel Bugzilla entry: > > Is there any known quirk or patch needed for this hardware? Or a way to assist debugging further (usbmon trace etc.)? Hi Brian, thank you for the report. Has this device worked before on previous kernels? If yes, you can try to find which kernel version was first affected and then run run `git bisect` between non-affected and affected versions to try to pinpoint offending commit. If the answer however is no, then you're pretty much on your own and it's up to you to compare working Windows usb traces with Linux ones. I suggest you try existing quirks first to see if one of them handles your bug, but if none does, then it's like I said, pretty much manual development. Thanks, Geraldo Nascimento > > Thanks in advance, > Brian Knutsson