Thanks Dmitri. If this is ok, then I am wondering what is the cause of "/dev/video0 cannot be opened" while running vl4-conf or testquickcam. The message from /var/log/messages is "modprobe: Can't locate module char-major-81-0". The video0 has a logical link to /dev/video0 and are permitted to be accessed by users. The quickcam has been registered after running quickcam.sh. I added "alias char-major-81 videodev" and "alias char-major-81-0 quickcam" into the /etc/modules.conf, but it is still not working. System: RH 7.1 Hardware: Logitech quickcam express webcam (USB) Driver: qce 0.40b I could not figure out what I am missing, please help. Thank you. Dmitri wrote: > > Quoting YH <yh86us@xxxxxxxxx>: > > > I was able to load modules videodev, usbcore and usb-uhci, but I had following > > errors while loading modules usb-ohci and uhci. What was missing? How can I > > fix it? > > > > /sbin/insmod usb-ohci > > Using /lib/modules/2.4.2-2/kernel/drivers/usb/usb-ohci.o > > /lib/modules/2.4.2-2/kernel/drivers/usb/usb-ohci.o: init_module: No such > > device Hint: insmod errors can be caused by incorrect module parameters, > > including invalid IO or IRQ parameters > > > > /sbin/insmod uhci > > Using /lib/modules/2.4.2-2/kernel/drivers/usb/uhci.o > > /lib/modules/2.4.2-2/kernel/drivers/usb/uhci.o: init_module: No such > > deviceHint: insmod errors can be caused by incorrect module parameters, > > including invalid IO or IRQ parameters > > *uhci and *ohci are drivers for different hardware. You usually have one > or the other, rarely both. In your case, you don't have OHCI host > controller, that's why the driver is not loading. This is OK. > > usb-uhci and uhci are two drivers for the same hardware (UHCI). You use > one or the other, but not both :-) Typically, usb-uhci is a safe bet. > > Dmitri > > ------------------------------------------------------------------------------ > Part 1.2Type: application/pgp-signature
