Em 18/07/2026 02:36, Baptiste Daroussin escreveu:
Le 14 juillet 2026 01:42:07 GMT+02:00, Nilton Jose Rizzo<[email protected]> a
écrit :
Hi all,
I upgraded my desktop last weekend and decided to try the new *uvideo*driver
from OpenBSD.
When I run |pwcview|, the image is displayed incorrectly: it is horizontally
duplicated and shows interlaced lines.
If I switch back to |webcamd|, the webcam works normally.
I also tested it with *Google Meet*and *Jitsi Meet*in Firefox.
On Google Meet, I receive a warning indicating that my webcam is not
functioning properly.
Has anyone experienced this issue or have any suggestions on how to
troubleshoot it?
My web cam is HD Pro C920 USB
ugen0.2: <HD Pro Webcam C920 Logitech, Inc.> at usbus0, cfg=0 md=HOST spd=HIGH
(480Mbps) pwr=ON (500mA)
$ usbconfig -v -d ugen0.2
ugen0.2: <HD Pro Webcam C920 Logitech, Inc.> at usbus0, cfg=0 md=HOST spd=HIGH
(480Mbps) pwr=ON (500mA)
ugen0.2.2: uaudio0: <vendor 0x046d HD Pro Webcam C920, class 239/2, rev 2.00/0.11,
addr 3>
bLength = 0x0012
bDescriptorType = 0x0001
bcdUSB = 0x0200
bDeviceClass = 0x00ef <Miscellaneous device>
bDeviceSubClass = 0x0002
bDeviceProtocol = 0x0001
bMaxPacketSize0 = 0x0040
idVendor = 0x046d
idProduct = 0x082d
bcdDevice = 0x0011
iManufacturer = 0x0000 <no string>
iProduct = 0x0002 <HD Pro Webcam C920>
iSerialNumber = 0x0001 <1BC69C1F>
bNumConfigurations = 0x0001
When uvideo load, show this message
uvideo0 on uhub1
uvideo0: <vendor 0x046d HD Pro Webcam C920, class 239/2, rev 2.00/0.11, addr 3>
on usbus0
uvideo0: too many PU descriptors found!
uvideo0: too many PU descriptors found!
uvideo0: too many PU descriptors found!
uvideo0: too many PU descriptors found!
uvideo0: too many PU descriptors found!
uvideo0: too many PU descriptors found!
uvideo0: too many PU descriptors found!
uvideo0: too many PU descriptors found!
uvideo0: too many PU descriptors found!
uvideo0: too many PU descriptors found!
uvideo0: 3 format(s), iface_index=1, endpoint=0x81, psize=3060, isoc
uvideo0: default format: pixfmt=0x56595559, 640x480, max_fbuf=4147200
uvideo0: UVC camera on /dev/video0
try updating UVIDEO_MAX_PU and UVIDEO_MAX_CT from 8 to 32.
in sys/dev/usb/video/uvideo.c
best regards,
Bapt
I change these values, PU warnings was gone.
My Webcam not work fine yet.
See this jpeg screenshot from pwcview using default values to fps and
resolution (sif).
https://imgur.com/a/YG89hK5
ugen0.2: <vendor 0x046d HD Pro Webcam C920> at usbus0
uvideo0 on uhub1
uvideo0: <vendor 0x046d HD Pro Webcam C920, class 239/2, rev 2.00/0.11,
addr 3> on usbus0
uvideo0: 3 format(s), iface_index=1, endpoint=0x81, psize=3060, isoc
uvideo0: default format: pixfmt=0x56595559, 640x480, max_fbuf=4147200
uvideo0: UVC camera on /dev/video0
uaudio0 on uhub1
uaudio0: <vendor 0x046d HD Pro Webcam C920, class 239/2, rev 2.00/0.11,
addr 3> on usbus0
uaudio0: No playback.
uaudio0: Record[0]: 32000 Hz, 2 ch, 16-bit S-LE PCM format, 2x4ms
buffer. (selected)
uaudio0: Record[0]: 24000 Hz, 2 ch, 16-bit S-LE PCM format, 2x4ms buffer.
uaudio0: Record[0]: 16000 Hz, 2 ch, 16-bit S-LE PCM format, 2x4ms buffer.
uaudio0: No MIDI sequencer.
pcm6 on uaudio0
uaudio0: No HID volume keys found.
uvideo0: stream open: nframes=51, psize=3060, maxVideoFrameSize=153600,
maxPayloadSize=800, alt=11, isoc
uvideo0: stream open: nframes=51, psize=3060, maxVideoFrameSize=153600,
maxPayloadSize=800, alt=11, isoc
--
**************************
* Dr. Nilton Jose Rizzo *
* Engenheiro Eletrônico *
* Doutor pela COPPE/UFRJ *
* Telegram: @njrizzo *
**************************
