[Linux-uvc-devel] Acer Webcam/ linux fedora 7

Mickael Drean mickael.drean at gmail.com
Sat Aug 18 18:45:22 CEST 2007


Hi laurent it's me (again :-) )


I've done a modprobe uvcvideo trace=255 (I found how to do)

here is the trace in the dmesg :

Linux video capture interface: v2.00
uvcvideo: Adding mapping Brightness to control
00000000-0000-0000-0000-000000000101/2.
uvcvideo: Adding mapping Contrast to control
00000000-0000-0000-0000-000000000101/3.
uvcvideo: Adding mapping Hue to control
00000000-0000-0000-0000-000000000101/6.
uvcvideo: Adding mapping Saturation to control
00000000-0000-0000-0000-000000000101/7.
uvcvideo: Adding mapping Sharpness to control
00000000-0000-0000-0000-000000000101/8.
uvcvideo: Adding mapping Gamma to control
00000000-0000-0000-0000-000000000101/9.
uvcvideo: Adding mapping Backlight Compensation to control
00000000-0000-0000-0000-000000000101/1.
uvcvideo: Adding mapping Gain to control
00000000-0000-0000-0000-000000000101/4.
uvcvideo: Adding mapping Power Line Frequency to control
00000000-0000-0000-0000-000000000101/5.
uvcvideo: Adding mapping Hue, Auto to control
00000000-0000-0000-0000-000000000101/16.
uvcvideo: Adding mapping Pan (relative) to control
63610682-5070-49ab-b8cc-b3855e8d2256/1.
uvcvideo: Adding mapping Tilt (relative) to control
63610682-5070-49ab-b8cc-b3855e8d2256/1.
uvcvideo: Adding mapping Pan/Tilt (reset) to control
63610682-5070-49ab-b8cc-b3855e8d2256/2.
uvcvideo: Adding mapping Exposure, Auto to control
00000000-0000-0000-0000-000000000001/2.
uvcvideo: Adding mapping Exposure (Absolute) to control
00000000-0000-0000-0000-000000000001/4.
uvcvideo: Adding mapping White Balance Temperature, Auto to control
00000000-0000-0000-0000-000000000101/11.
uvcvideo: Adding mapping White Balance Temperature to control
00000000-0000-0000-0000-000000000101/10.
uvcvideo: Probing known UVC device 6 (5986:0100)
uvcvideo: Found format MJPEG.
uvcvideo: - 640x480 (30.0 fps)
uvcvideo: - 320x240 (30.0 fps)
uvcvideo: - 160x120 (30.0 fps)
uvcvideo: - 352x288 (30.0 fps)
uvcvideo: - 176x144 (30.0 fps)
uvcvideo: Found format YUV 4:2:2 (YUYV).
uvcvideo: - 640x480 (30.0 fps)
uvcvideo: - 320x240 (30.0 fps)
uvcvideo: - 160x120 (30.0 fps)
uvcvideo: - 352x288 (30.0 fps)
uvcvideo: - 176x144 (30.0 fps)
uvcvideo: Found a Status endpoint (addr 82).
uvcvideo: Found UVC 1.00 device USB2.0 Camera (5986:0100)
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/2 to device 6
entity 5
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/3 to device 6
entity 5
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/6 to device 6
entity 5
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/7 to device 6
entity 5
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/8 to device 6
entity 5
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/9 to device 6
entity 5
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/1 to device 6
entity 5
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/5 to device 6
entity 5
uvcvideo: Added control 00000000-0000-0000-0000-000000000001/2 to device 6
entity 1
uvcvideo: Added control 00000000-0000-0000-0000-000000000001/4 to device 6
entity 1
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/11 to device 6
entity 5
uvcvideo: Added control 00000000-0000-0000-0000-000000000101/10 to device 6
entity 5
uvcvideo: Scanning UVC chain: OT 3 <- XU 6 <- PU 5 <- SU 4 <- IT 1
uvcvideo: Found a valid video chain (1 -> 3).
uvcvideo: UVC device initialized.
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v0.1.0)


Is it interesting for you?

Maybe my modprobe.conf should have some special options for the webcam?

Mick

2007/8/18, Mickael Drean <mickael.drean at gmail.com>:
>
> You are true for that error, I didn't get it anymore.....
>
>
> But I still have a black screen and nothing in dmesg
>
>
> Mick
>
> 2007/8/18, Laurent Pinchart < laurent.pinchart at skynet.be>:
> >
> > On Saturday 18 August 2007, Mickael Drean wrote:
> > > 2007/8/18, Laurent Pinchart <laurent.pinchart at skynet.be>:
> > > > Hi Mickaël,
> > > >
> > > > On Saturday 18 August 2007, Mickael Drean wrote:
> > > > > I've tested to launch luvcvideo on GNOME instead of KDE and I get
> > an
> > > >
> > > > error
> > > >
> > > > > message :
> > > > > luvcview version 0.2.1
> > > > > Video driver: x11
> > > > > A window manager is available
> > > > > video /dev/video0
> > > > > Unable to set format: 16.
> > > > >  Init v4L2 failed !! exit fatal
> > > >
> > > > What do you get in dmesg ?
> > >
> > > Nothing, but you talked about possibility to add trace with a '255'
> > value.
> > > I didn't do it because I don't know how to do it, could you please
> > specify
> > > me how to do maybe we will have more info with thoses traces.
> >
> > Error 16 is EBUSY. You can't stream from the webcam using two programs
> > at
> > once. Are you sure that there wasn't still an old instance of luvcview
> > running ?
> >
> > Laurent Pinchart
> >
>
>
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