Re: [Linux-uvc-devel] uvcview or luvcview

[Lars P. <lp...@la...>]

>> I have installed both uvcview and luvcview. They both work with my
>> QuickCam Fusion and the uvcvideo driver.
>> What is the difference between the two programs?
> 
> There's no difference, uvcview has been renamed to luvcview (naming issue, 
> uvcview is a Microsoft software).
> 
QC Fusion on my Suse 10.0, kernel 2.6 13-15.8. KDE 3.5.1
My screen has a built in usb hub, that apparently is not usb2. This hub 
is plugged in a usb2 port in the computer.
luvcview works perfectly with QC Fusion connected to the hub.
luvcvview flickers when QC Fusion is connected to a genuine usb2 port in 
the computer.

When connecting to the genuine usb2 port dmesg says:

usb 4-5: new high speed USB device using ehci_hcd and address 4
uvcvideo: Found UVC 1.00 device <unnamed> (046d:08c1)
ALSA sound/usb/usbaudio.c:1213: 4:3:1: cannot set freq 0 to ep 0x86
ALSA sound/usb/usbaudio.c:1213: 4:3:2: cannot set freq 0 to ep 0x86
ALSA sound/usb/usbaudio.c:1220: 4:3:3: cannot get freq at ep 0x86

When connecting to the hub in the screen dmesg says:

usb 3-2.5: new full speed USB device using ohci_hcd and address 4
usb 3-2.5: not running at top speed; connect to a high speed hub
uvcvideo: Found UVC 1.00 device <unnamed> (046d:08c1)
ALSA sound/usb/usbaudio.c:1213: 4:3:1: cannot set freq 0 to ep 0x86
ALSA sound/usb/usbaudio.c:1213: 4:3:2: cannot set freq 0 to ep 0x86
ALSA sound/usb/usbaudio.c:1213: 4:3:3: cannot set freq 16000 to ep 0x86

> 
> Kopete 0.11 (KDE 3.5.0) should detect the webcam. If it doesn't, have a look 
> at the kernel log to see if there's anything related to the UVC driver.
> 
I'm not a kernel expert and don't know where to find the kernel log.
All I know about installing kernel modules is from playing with uvcvideo 
and QC Fusion.
lars@linux:~> lsmod | grep uvcvideo
uvcvideo               30340  0
v4l2_common             5760  2 uvcvideo,bttv
videodev                9088  2 uvcvideo,bttv
usbcore               112512  7 
usbhid,snd_usb_audio,snd_usb_lib,uvcvideo,ehci_hcd,ohci_hcd

Lars Pontoppidan