[root@asus ~]# xawtv
This is xawtv-3.95, running on Linux/i686 (2.6.25.14-108.fc9.i686)
xinerama 0: 1280×800+0+0
/dev/video0 [v4l2]: no overlay support
v4l-conf had some trouble, trying to continue anyway
ioctl: VIDIOC_S_CTRL(id=9963778;value=32767): Unknown error 515
ioctl: VIDIOC_S_CTRL(id=9963776;value=32767): Unknown error 515
ioctl: VIDIOC_S_CTRL(id=9963777;value=32767): Unknown error 515
v4l2: oops: select timeout
game over
[root@asus ~]#

dmesg:
stk11xx: usb_stk11xx_exit: Syntek USB2.0 webcam driver shutdown
usbcore: deregistering interface driver usb_stk11xx_driver
stk11xx: Syntek USB2.0 Camera disconnected
stk11xx: Syntek USB2.0 Camera release resources video device /dev/video0
Linux video capture interface: v2.00
stk11xx: Syntek USB2.0 webcam driver startup
stk11xx: Syntek USB2.0 – STK-1135 based webcam found.
stk11xx: Syntek AVStream USB2.0 1.3M WebCam – Product ID 0x6A33.
stk11xx: Release: 0005
stk11xx: Number of interfaces : 1
stk11xx: Initialize USB2.0 Syntek Camera
stk11xx: Syntek USB2.0 Camera is ready
stk11xx: Syntek USB2.0 Camera is now controlling video device /dev/video0
usbcore: registered new interface driver usb_stk11xx_driver
stk11xx: v1.3.1 : Syntek USB Video Camera
stk11xx: Check device return error (0×0201 = 0C) !
stk11xx: Check device return error (0×0201 = 0C) !
stk11xx: Check device return error (0×0201 = 0C) !
stk11xx: Check device return error (0×0201 = 0C) !
stk11xx: Check device return…
then
stk11xx: Error : Register 0×0001 = 02
stk11xx: Error : Register 0×0001 = 02
stk11xx: Error : Register 0×0001 = 02
…

Any idea? I am posting on the Fedora Forum if you want to follow…
http://forums.fedoraforum.org/forum/showthread.php?t=197466

cheers