[PATCH] ALSA: usb-audio: Avoid applying boot quirk for Behringer UMC204HD

[PATCH] ALSA: usb-audio: Avoid applying boot quirk for Behringer UMC204HD

[Takashi Iwai]

There have been reports about a regression with the recent boot quirk
for Behringer devices; it broke UMC204HD models(1397:0508 and
1397:0509).  The quirk was to just run usb_get_descriptor(), so I
expected it rather harmful, but in this case, it doesn't look so,
resulting in an error like 'failed to read device descriptor: -110'
that leads to a fatal probe error.

As a quick workaround, skip the quirk for those UMC204HD models.

Fixes: b5c4823cf3e4 ("ALSA: usb-audio: Apply boot quirk for Behringer models generically")
Reported-by: Will Bush <will@willbush.dev>
Closes: https://lore.kernel.org/45162613-2802-401c-84c9-742f9c8c68e6@app.fastmail.com
Closes: https://bugzilla.suse.com/show_bug.cgi?id=1285896
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/quirks.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 4fadb1fdcdea..4ac4aef47dd7 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1790,8 +1790,15 @@ int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
 	}
 
 	/* Behringer devices may need explicit device descriptor read at boot */
-	if (USB_ID_VENDOR(id) == 0x1397)
+	if (USB_ID_VENDOR(id) == 0x1397) {
+		/* the quirk seems breaking on some Behringer devices */
+		switch (id) {
+		case USB_ID(0x1397, 0x0508): /* UMC204HD */
+		case USB_ID(0x1397, 0x0509): /* UMC204HD */
+			return 0;
+		}
 		return snd_usb_cm1a_boot_quirk(dev);
+	}
 
 	return 0;
 }
-- 
2.55.0

Re: [PATCH] ALSA: usb-audio: Avoid applying boot quirk for Behringer UMC204HD

[Gergo Koteles]

Hi Takashi,

On Mon, 2026-10-19 at 12:23 +0200, Takashi Iwai wrote:
> There have been reports about a regression with the recent boot quirk
> for Behringer devices; it broke UMC204HD models(1397:0508 and
> 1397:0509).  The quirk was to just run usb_get_descriptor(), so I
> expected it rather harmful, but in this case, it doesn't look so,
> resulting in an error like 'failed to read device descriptor: -110'
> that leads to a fatal probe error.
> 
> As a quick workaround, skip the quirk for those UMC204HD models.
> 
> Fixes: b5c4823cf3e4 ("ALSA: usb-audio: Apply boot quirk for Behringer models generically")
> Reported-by: Will Bush <will@willbush.dev>
> Closes: https://lore.kernel.org/45162613-2802-401c-84c9-742f9c8c68e6@app.fastmail.com
> Closes: https://bugzilla.suse.com/show_bug.cgi?id=1285896
> Signed-off-by: Takashi Iwai <tiwai@suse.de>
> ---
>  sound/usb/quirks.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
> index 4fadb1fdcdea..4ac4aef47dd7 100644
> --- a/sound/usb/quirks.c
> +++ b/sound/usb/quirks.c
> @@ -1790,8 +1790,15 @@ int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
>  	}
>  
>  	/* Behringer devices may need explicit device descriptor read at boot */
> -	if (USB_ID_VENDOR(id) == 0x1397)
> +	if (USB_ID_VENDOR(id) == 0x1397) {
> +		/* the quirk seems breaking on some Behringer devices */
> +		switch (id) {
> +		case USB_ID(0x1397, 0x0508): /* UMC204HD */
> +		case USB_ID(0x1397, 0x0509): /* UMC204HD */

0x0509 is the UMC404HD

https://linux-hardware.org/?id=usb:1397-0509

Best regards,
Gergo

Re: [PATCH] ALSA: usb-audio: Avoid applying boot quirk for Behringer UMC204HD

[Takashi Iwai]

On Fri, 23 Oct 2026 22:04:02 +0200,
Gergo Koteles wrote:
> 
> Hi Takashi,
> 
> On Mon, 2026-10-19 at 12:23 +0200, Takashi Iwai wrote:
> > There have been reports about a regression with the recent boot quirk
> > for Behringer devices; it broke UMC204HD models(1397:0508 and
> > 1397:0509).  The quirk was to just run usb_get_descriptor(), so I
> > expected it rather harmful, but in this case, it doesn't look so,
> > resulting in an error like 'failed to read device descriptor: -110'
> > that leads to a fatal probe error.
> > 
> > As a quick workaround, skip the quirk for those UMC204HD models.
> > 
> > Fixes: b5c4823cf3e4 ("ALSA: usb-audio: Apply boot quirk for Behringer models generically")
> > Reported-by: Will Bush <will@willbush.dev>
> > Closes: https://lore.kernel.org/45162613-2802-401c-84c9-742f9c8c68e6@app.fastmail.com
> > Closes: https://bugzilla.suse.com/show_bug.cgi?id=1285896
> > Signed-off-by: Takashi Iwai <tiwai@suse.de>
> > ---
> >  sound/usb/quirks.c | 9 ++++++++-
> >  1 file changed, 8 insertions(+), 1 deletion(-)
> > 
> > diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
> > index 4fadb1fdcdea..4ac4aef47dd7 100644
> > --- a/sound/usb/quirks.c
> > +++ b/sound/usb/quirks.c
> > @@ -1790,8 +1790,15 @@ int snd_usb_apply_boot_quirk_once(struct usb_device *dev,
> >  	}
> >  
> >  	/* Behringer devices may need explicit device descriptor read at boot */
> > -	if (USB_ID_VENDOR(id) == 0x1397)
> > +	if (USB_ID_VENDOR(id) == 0x1397) {
> > +		/* the quirk seems breaking on some Behringer devices */
> > +		switch (id) {
> > +		case USB_ID(0x1397, 0x0508): /* UMC204HD */
> > +		case USB_ID(0x1397, 0x0509): /* UMC204HD */
> 
> 0x0509 is the UMC404HD
> 
> https://linux-hardware.org/?id=usb:1397-0509

You're right.  I'll correct it.


thanks,

Takashi

Re: [PATCH] ALSA: usb-audio: Avoid applying boot quirk for Behringer UMC204HD

[Will Bush]

On Mon, Oct 19, 2026, at 5:23 AM, Takashi Iwai wrote:
> As a quick workaround, skip the quirk for those UMC204HD models.

I tested your patch on 7.2.10 with my UMC204HD (1397:0508) and it works. Thanks!

Tested-by: Will Bush <will@willbush.dev>

Best,
Will

Re: [PATCH] ALSA: usb-audio: Avoid applying boot quirk for Behringer UMC204HD

[Zinedin Polic]

Good evening Takashi Iwai,

I have the same problem with my Behringer UMC204HD (1397:0508).

It worked on kernel 7.2.9. Since 7.2.10 (also 7.2.11) the device does
not work anymore.

The kernel log shows this again and again:

   usb 8-6: failed to read device descriptor: -110
   snd-usb-audio 8-6:1.0: probe with driver snd-usb-audio failed with 
error -110
   usb 8-6: failed to read device descriptor: -110
   snd-usb-audio 8-6:1.3: probe with driver snd-usb-audio failed with 
error -110
   usb 8-6: failed to read device descriptor: -110
   snd-usb-audio 8-6:1.4: probe with driver snd-usb-audio failed with 
error -110
   usb 8-6: USB disconnect, device number 58
   usb 8-6: new high-speed USB device number 59 using xhci-pci-prom21

The device reconnects every 15 seconds, forever.

I applied your patch to 7.2.11 and rebuilt snd-usb-audio. Now the
device works again.

Tested-by: Zinedin Polic <zinedinpolic@elbengeist.moe>

Two small things:

1. In the patch, 1397:0509 has the comment "UMC204HD". But 0509 is the 
UMC404HD (a different Behringer product, see the quirk table in the same 
file). Only the comment is wrong.

2. The UMC202HD (1397:0507) is from the same product family. Maybe it 
has the same problem. I can't test it.

Would like to see it in stable.

Best regards,
Zinedin Polic