Hi. I have used kubuntu for one year and that is the first time I confirm a 
bug. I was using kubuntu hardy with my webcam working perfectly. But after a 
clean install of kubuntu intrepid my webcam can't correctly work with the usual 
program (skype, vlc, kopete, etc). The images became weird. The kernel is 
updated, all the packages too. The only way I get it work perfectly is 
installing the libv4l-0 package and using the commands: 
LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so skype
LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so vlc
LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so kopete

I thing it should not happen that way.

#lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 04fc:0561 Sunplus Technology Co., Ltd Flexcam 100
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

#lsmod | grep video
video                  25104  0
output                 11008  1 video
videodev               41344  1 gspca_main
v4l1_compat            22404  1 videodev


# dmesg
[    2.975286] usbcore: registered new interface driver usbfs                   
[    2.975316] usbcore: registered new interface driver hub                     
[    2.975388] usbcore: registered new device driver usb                        
[    3.043677] usb usb1: configuration #1 chosen from 1 choice                  
[    3.043705] hub 1-0:1.0: USB hub found                                       
[    3.043717] hub 1-0:1.0: 8 ports detected                                    
[    3.260043] ehci_hcd 0000:00:02.1: USB 2.0 started, EHCI 1.00, driver 10 Dec 
2004                                                                            
[    3.260242] usb usb2: configuration #1 chosen from 1 choice                  
[    3.260276] hub 2-0:1.0: USB hub found                                       
[    3.260287] hub 2-0:1.0: 8 ports detected       
[    3.884032] usb 1-6: new full speed USB device using ohci_hcd and address 2
[    4.096672] usb 1-6: configuration #1 chosen from 1 choice
[   22.306044] Linux video capture interface: v2.00                             
[   22.358641] gspca: main v2.2.0 registered                                    
[   22.430087] gspca: probing 04fc:0561                                         
[   22.679486] Linux agpgart interface v0.103                                   
[   22.984966] gspca: probe ok                                                  
[   22.985001] usbcore: registered new interface driver spca561                 
[   22.985039] spca561: registered       


# modprobe -l gspc*                                         
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_spca506.ko 
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_ov519.ko   
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_sonixj.ko  
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_spca505.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_sunplus.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_stk014.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_spca508.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_conex.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_t613.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_spca501.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_sonixb.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_vc032x.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_spca561.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_pac207.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_pac7311.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_main.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_spca500.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_zc3xx.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_etoms.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_tv8532.ko
/lib/modules/2.6.27-9-generic/kernel/drivers/media/video/gspca/gspca_mars.ko

-- 
Z-Star Microelectronics Corp. ZC0301 WebCam detected (0ac8:301b), but not 
working - Bad module
https://bugs.launchpad.net/bugs/144745
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