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Mon, 19 Oct 2026 10:23:05 +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 8TkfAYnv1WpHWgAAD6G6ig (envelope-from ); Mon, 19 Oct 2026 10:23:05 +0000 Date: Mon, 19 Oct 2026 12:23:04 +0200 Message-ID: <871p9mat13.wl-tiwai@suse.de> From: Takashi Iwai To: Takashi Iwai Cc: "Will Bush" , "Takashi Iwai" , "Jaroslav Kysela" , linux-sound@vger.kernel.org, regressions@lists.linux.dev, stable@vger.kernel.org, "Jan Lentfer" , Sebastian =?ISO-8859-1?Q?Dalfu=DF?= Subject: Re: [REGRESSION] usb-audio: Behringer UMC204HD broken in 7.2.10 In-Reply-To: <87a4oaavrv.wl-tiwai@suse.de> References: <45162613-2802-401c-84c9-742f9c8c68e6@app.fastmail.com> <87tsmjarjs.wl-tiwai@suse.de> <87a4oaavrv.wl-tiwai@suse.de> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spam-Flag: NO X-Spam-Score: -7.30 X-Spam-Level: X-Spamd-Result: default: False [-7.30 / 50.00]; REPLY(-4.00)[]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_ALL(0.00)[]; FREEMAIL_ENVRCPT(0.00)[web.de]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_SEVEN(0.00)[9]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCVD_COUNT_TWO(0.00)[2]; FREEMAIL_CC(0.00)[willbush.dev,suse.com,perex.cz,vger.kernel.org,lists.linux.dev,web.de,sedf.de]; TO_DN_SOME(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.com:url] On Mon, 19 Oct 2026 11:23:48 +0200, Takashi Iwai wrote: > > On Mon, 19 Oct 2026 10:39:46 +0200, > Will Bush wrote: > > > > On Sun, Oct 18, 2026, at 11:42 AM, Takashi Iwai wrote: > > > Interesting, it's just a descriptor read and this fails on your device > > > by some reason. Could you try to ignore the error like below, and > > > verify whether it continues to work? > > > > Thanks for the quick reply. I reverted my patch and applied yours. Device keeps > > disconnecting and reconnecting (just more slowly). It never ends up working. > > > > ❯ journalctl -k -b -0 -o short-monotonic | grep -E 'usb 3-4|snd-usb-audio 3-4' > > [ 2.264012] blazar kernel: usb 3-4: new high-speed USB device number 3 using xhci_hcd > > [ 2.458009] blazar kernel: usb 3-4: New USB device found, idVendor=1397, idProduct=0508, bcdDevice= 1.35 > > [ 2.484013] blazar kernel: usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0 > > [ 2.484035] blazar kernel: usb 3-4: Product: UMC204HD 192k > > [ 2.484050] blazar kernel: usb 3-4: Manufacturer: BEHRINGER > > [ 12.976010] blazar kernel: usb 3-4: USB disconnect, device number 3 > > [ 18.012013] blazar kernel: usb 3-4: failed to read device descriptor: -110 > > [ 18.012623] blazar kernel: usb 3-4: parse_audio_format_rates_v2v3(): unable to retrieve number of sample rates (clock 41) > > [ 18.012768] blazar kernel: usb 3-4: parse_audio_format_rates_v2v3(): unable to retrieve number of sample rates (clock 41) > > [ 18.012903] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 1 (-19) > > [ 18.013047] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 2 (-19) > > [ 18.013181] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 3 (-19) > > [ 18.013309] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 4 (-19) > > [ 18.013434] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 0 (-19) > > [ 18.013565] blazar kernel: usb 3-4: 10:0: cannot get min/max values for control 2 (id 10) > > [ 18.013690] blazar kernel: usb 3-4: Warning! Unlikely small volume range (=1), linear volume or custom curve? > > [ 18.013822] blazar kernel: usb 3-4: [10] FU [PCM Playback Volume] ch = 4, val = 0/1/1 > > [ 18.013959] blazar kernel: usb 3-4: 10:0: cannot get min/max values for control 2 (id 10) > > [ 18.014102] blazar kernel: usb 3-4: Warning! Unlikely small volume range (=1), linear volume or custom curve? > > [ 18.014239] blazar kernel: usb 3-4: [10] FU [PCM Playback Volume] ch = 1, val = 0/1/1 > > [ 18.014374] blazar kernel: usb 3-4: 11:0: failed to get current value for ch 1 (-19) > > [ 18.014508] blazar kernel: usb 3-4: 11:0: failed to get current value for ch 2 (-19) > > [ 18.014635] blazar kernel: usb 3-4: 11:0: failed to get current value for ch 0 (-19) > > [ 18.014763] blazar kernel: usb 3-4: 11:0: cannot get min/max values for control 2 (id 11) > > [ 18.014890] blazar kernel: usb 3-4: Warning! Unlikely small volume range (=1), linear volume or custom curve? > > [ 18.015021] blazar kernel: usb 3-4: [11] FU [Mic Capture Volume] ch = 2, val = 0/1/1 > > [ 18.015151] blazar kernel: usb 3-4: 11:0: cannot get min/max values for control 2 (id 11) > > [ 18.015278] blazar kernel: usb 3-4: Warning! Unlikely small volume range (=1), linear volume or custom curve? > > [ 18.015408] blazar kernel: usb 3-4: [11] FU [Mic Capture Volume] ch = 1, val = 0/1/1 > > [ 18.300040] blazar kernel: usb 3-4: new high-speed USB device number 6 using xhci_hcd > > [ 18.491087] blazar kernel: usb 3-4: New USB device found, idVendor=1397, idProduct=0508, bcdDevice= 1.35 > > [ 18.517036] blazar kernel: usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0 > > [ 18.517242] blazar kernel: usb 3-4: Product: UMC204HD 192k > > [ 18.517398] blazar kernel: usb 3-4: Manufacturer: BEHRINGER > > [ 23.644013] blazar kernel: usb 3-4: failed to read device descriptor: -110 > > [ 33.884021] blazar kernel: usb 3-4: parse_audio_format_rates_v2v3(): unable to retrieve number of sample rates (clock 41) > > [ 49.244015] blazar kernel: usb 3-4: parse_audio_format_rates_v2v3(): unable to retrieve number of sample rates (clock 41) > > [ 59.484034] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 1 (-110) > > [ 69.725032] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 2 (-110) > > [ 79.965020] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 3 (-110) > > [ 90.204027] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 4 (-110) > > [ 100.444027] blazar kernel: usb 3-4: 10:0: failed to get current value for ch 0 (-110) > > [ 110.684056] blazar kernel: usb 3-4: 10:0: cannot get min/max values for control 2 (id 10) > > [ 110.684281] blazar kernel: usb 3-4: Warning! Unlikely small volume range (=1), linear volume or custom curve? > > [ 110.684397] blazar kernel: usb 3-4: [10] FU [PCM Playback Volume] ch = 4, val = 0/1/1 > > [ 115.804025] blazar kernel: usb 3-4: 10:0: cannot get min/max values for control 2 (id 10) > > [ 115.812386] blazar kernel: usb 3-4: Warning! Unlikely small volume range (=1), linear volume or custom curve? > > [ 115.812521] blazar kernel: usb 3-4: [10] FU [PCM Playback Volume] ch = 1, val = 0/1/1 > > [ 131.164026] blazar kernel: usb 3-4: 11:0: failed to get current value for ch 1 (-110) > > [ 141.404011] blazar kernel: usb 3-4: 11:0: failed to get current value for ch 2 (-110) > > [ 151.644020] blazar kernel: usb 3-4: 11:0: failed to get current value for ch 0 (-110) > > [ 161.885033] blazar kernel: usb 3-4: 11:0: cannot get min/max values for control 2 (id 11) > > [ 161.885326] blazar kernel: usb 3-4: Warning! Unlikely small volume range (=1), linear volume or custom curve? > > [ 161.885446] blazar kernel: usb 3-4: [11] FU [Mic Capture Volume] ch = 2, val = 0/1/1 > > [ 167.004009] blazar kernel: usb 3-4: 11:0: cannot get min/max values for control 2 (id 11) > > [ 167.004224] blazar kernel: usb 3-4: Warning! Unlikely small volume range (=1), linear volume or custom curve? > > [ 167.004341] blazar kernel: usb 3-4: [11] FU [Mic Capture Volume] ch = 1, val = 0/1/1 > > [ 167.005012] blazar kernel: usb 3-4: Quirk or no altset; falling back to MIDI 1.0 > > [ 187.486013] blazar kernel: usb 3-4: USB disconnect, device number 6 > > [ 187.785034] blazar kernel: usb 3-4: new high-speed USB device number 7 using xhci_hcd > > ... > > [ 1035.327013] blazar kernel: usb 3-4: New USB device found, idVendor=1397, idProduct=0508, bcdDevice= 1.35 > > [ 1035.353013] blazar kernel: usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0 > > [ 1035.353185] blazar kernel: usb 3-4: Product: UMC204HD 192k > > [ 1035.353301] blazar kernel: usb 3-4: Manufacturer: BEHRINGER > > [ 1040.476017] blazar kernel: usb 3-4: failed to read device descriptor: -110 > > [ 1050.717019] blazar kernel: usb 3-4: parse_audio_format_rates_v2v3(): unable to retrieve number of sample rates (clock 41) > > ... > > OK, thanks. Then the only way to introduce some deny list. > Below is a quick fix. I'm going to submit & merge this later. ... and now we received another report for the similar Behringer model, so both should be listed. I'm going to update the patch and submit. https://bugzilla.suse.com/show_bug.cgi?id=1285896 Takashi