Re: uvcvideo: Logitech Brio 500 (046d:0943) needs UVC_QUIRK_PROBE_DEF

[Perry Joyce]

Hi,

Resending in plain text as requested.

I'm seeing a reproducible UVC probe error with a Logitech Brio 500 (046d:0943):

uvcvideo 1-3:1.0: Found UVC 1.00 device Brio 500 (046d:0943)
uvcvideo 1-3:1.1: Failed to set UVC probe control : -32 (exp. 26).

Kernel:

Linux archlinux 7.2.6-1-cachyos-bore #1 SMP PREEMPT_DYNAMIC Thu, 17
Sep 2026 07:33:37 +0000 x86_64 GNU/Linux

The webcam otherwise works normally.

Testing with UVC_QUIRK_PROBE_DEF fixes the initialization error:

modprobe -r uvcvideo

modprobe uvcvideo quirks=0x100

After loading the module with 0x100, the device initializes without
the probe-control error:

uvcvideo 1-3:1.0: Found UVC 1.00 device Brio 500 (046d:0943)
uvcvideo 1-3:1.0: Forcing device quirks to 0x100 by module parameter
for testing purpose.
uvcvideo 1-3:1.0: Please report required quirks to the linux-media mailing list.

I also tested this across a reboot with:

options uvcvideo quirks=0x100

and the probe error remains absent. Normal 1920x1080 MJPEG capture at
30 fps continues to work.

Device information:

idVendor=046d
idProduct=0943
bcdDevice=0.21
Product: Brio 500

Would it be appropriate to add UVC_QUIRK_PROBE_DEF for this device?

I'm happy to provide additional logs or test a patch if needed.

Kind regards,
Perry


On Fri, 25 Sept 2026 at 21:57, Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
>
> Hello Perry,
>
> Your original e-mail was sent as HTML, which gets silently rejected by
> the kernel mailing lists. Could you please resend it as plain text ?
>
> On Fri, Sep 25, 2026 at 09:31:42PM +0100, Perry Joyce wrote:
> > Hi,
> >
> > I'm seeing a reproducible UVC probe error with a Logitech Brio 500 (046d:0943):
> >
> > uvcvideo 1-3:1.0: Found UVC 1.00 device Brio 500 (046d:0943)
> > uvcvideo 1-3:1.1: Failed to set UVC probe control : -32 (exp. 26).
> >
> > Kernel:
> >
> > Linux archlinux 7.2.6-1-cachyos-bore #1 SMP PREEMPT_DYNAMIC Thu, 17 Sep 2026
> > 07:33:37 +0000 x86_64 GNU/Linux
> >
> > The webcam otherwise works normally.
> >
> > Testing with UVC_QUIRK_PROBE_DEF fixes the initialization error:
> >
> > # modprobe -r uvcvideo
> > # modprobe uvcvideo quirks=0x100
> >
> > After loading the module with 0x100, the device initializes without the
> > probe-control error:
> >
> > uvcvideo 1-3:1.0: Found UVC 1.00 device Brio 500 (046d:0943)
> > uvcvideo 1-3:1.0: Forcing device quirks to 0x100 by module parameter for
> > testing purpose.
> > uvcvideo 1-3:1.0: Please report required quirks to the linux-media mailing
> > list.
> >
> > I also tested this across a reboot with:
> >
> > options uvcvideo quirks=0x100
> >
> > and the probe error remains absent. Normal 1920x1080 MJPEG capture at 30 fps
> > continues to work.
> >
> > Device information:
> >
> > idVendor=046d
> > idProduct=0943
> > bcdDevice=0.21
> > Product: Brio 500
> >
> > Would it be appropriate to add UVC_QUIRK_PROBE_DEF for this device?
> >
> > I'm happy to provide additional logs or test a patch if needed.
> >
> >
> > Kind Regards,
> > Perry
>
> --
> Regards,
>
> Laurent Pinchart