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Date: Mon, 29 Sep 2025 19:07:52 +0530 Message-ID: <20250929133752.31847-1-sidharthseela@gmail.com> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Dear Maintainers, I am using a generic "boat" make earphones, which are too loud across different systems with eg: iOS, macOS, Debian Linux. And hence I believe the issue is not with a driver but the headphones. After connecting this device to laptop I get the following in dmesg logs: usb 1-5: New USB device found, idVendor=001f, idProduct=0b21, bcdDevice= 1.00 usb 1-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-5: Product: AB13X USB Audio usb 1-5: Manufacturer: Generic usb 1-5: SerialNumber: 20210726905926 usb 1-5: Warning! Unlikely big volume range (=11520), cval->res is probably wrong. usb 1-5: [2] FU [PCM Playback Volume] ch = 2, val = -11520/0/1 usb 1-5: Warning! Unlikely big volume range (=8191), cval->res is probably wrong. usb 1-5: [5] FU [Mic Capture Volume] ch = 1, val = 0/8191/1 By using pavucontrol, I am able to get fair sound, after reducing 17dB in Analog Stereo Output and reducing 6dB in Digital Stereo Output. I believe this issue could be solved by adding a quirk patch to sound/usb/mixer.c:1096 (/* volume control quriks */). BR, Sidharth Seela