LinuxQuestions.org - Hp webcam 101 recognized, but does not work...

- Linux - Newbie (https://www.linuxquestions.org/questions/linux-newbie-8/)

- - Hp webcam 101 recognized, but does not work... (https://www.linuxquestions.org/questions/linux-newbie-8/hp-webcam-101-recognized-but-does-not-work-4175462616/)

Hp webcam 101 recognized, but does not work...

Hello everyone, the system does recognize the cam, but I cant manage to make it work.

When I execute Kamoso this is what i get from the console:

Quote:

libv4l2: error dequeuing buf: No such device
.
.
.
libv4l2: error dequeuing buf: No such device

When I closed it I got:

Quote:

kamoso(1942)/kdecore (KConfigSkeleton) KCoreConfigSkeleton::writeConfig:
libv4l2: error turning off stream: No such device

(kamoso:1942): GStreamer-CRITICAL **: Failed to deactivate pad v4l2src:src, very bad

When i run dmes it says that it is well loaded the drivers (I believe):

Quote:

$ dmesg | grep uvcvideo
[ 6.456416] uvcvideo: Found UVC 1.00 device HP Webcam-101 (174f:112b)
[ 9.274548] usbcore: registered new interface driver uvcvideo
[ 312.731307] uvcvideo: Failed to resubmit video URB (-19).
[ 313.760961] uvcvideo: Found UVC 1.00 device HP Webcam-101 (174f:112b)
[ 324.537766] uvcvideo: Found UVC 1.00 device HP Webcam-101 (174f:112b)
[ 369.046218] uvcvideo: Found UVC 1.00 device HP Webcam-101 (174f:112b)
[ 374.561070] uvcvideo: Found UVC 1.00 device HP Webcam-101 (174f:112b)
[ 1649.610976] uvcvideo: Found UVC 1.00 device HP Webcam-101 (174f:112b)

Some info:

Quote:

$ usb-devices:
T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 6 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=174f ProdID=112b Rev=11.02
S: Manufacturer=GenesysLogic Technology Co., Ltd.
S: Product=HP Webcam-101
C: #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=200mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=0e(video) Sub=01 Prot=00 Driver=uvcvideo
I: If#= 1 Alt= 0 #EPs= 0 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo

Also these are the modules loaded:

Quote:

$ lsmod | grep uvcvideo:
uvcvideo 72744 0
videobuf2_vmalloc 3304 1 uvcvideo
videobuf2_core 27349 1 uvcvideo
videodev 103860 2 uvcvideo,videobuf2_core
media 10309 2 uvcvideo,videodev
usbcore 173007 5 uvcvideo,rtl8187,ohci_hcd,ehci_hcd,ehci_pci

I've tried with phonon vlc and gstreamer: some thing for both...

Any idea of whats happening?

Hope someone can help. Thanks.

It's a guvc webcam. Have you tried guvcview?

You don't mention your distro, but it's likely in your repos.

Yes, I've installed many programs for camera manipulation but none works. This is the output from the konsole for guvcview:

Quote:

.
.
.
libv4l2: error dequeuing buf: No such device
VIDIOC_DQBUF - Unable to dequeue buffer : No such device
Error grabbing image
write /home/erdave/.config/guvcview/video0 OK
libv4l2: error turning off stream: No such device
VIDIOC_STREAMOFF - Unable to stop capture: No such device
libv4l2: error querying buffer 0: No such device
VIDIOC_REQBUFS - Failed to delete buffers: Device or resource busy (errno 16)
free controls
cleaned allocations - 100%
Closing portaudio ...OK
Closing GTK... OK

I have archlinux:

Quote:

Linux ghost-pc 3.9.2-1-ARCH #1 SMP PREEMPT Sat May 11 20:31:08 CEST 2013 x86_64 GNU/Linux

BTW, sorry for answering this late, but I've no internet acces at my home, so its kind of difficult.

I'm afraid I've exhausted my knowledge of webcams. I don't use them very much. I usually just make sure they work and then forget about them.

Hopefully, someone who knows more than I will happen on this thread.