[H-GEN] using webcam on linux & windows
Johann Kwiatkowski
johann at spot-the-dog.com
Mon Sep 8 05:20:52 EDT 2003
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On Mon, 2003-09-08 at 18:45, David wrote:
> [ Humbug *General* list - semi-serious discussions about Humbug and ]
> [ Unix-related topics. Posts from non-subscribed addresses will vanish. ]
> > My guess would be that you need to unload the host machine's driver that is
> > controlling the device. VMware should then be able to provide a virtual
> > USB interface to the guest system that it looks at to find the webcam.
> >
> How do I unload the driver? I thought of that but don't know how to do it.
lsmod will show if the driver is loaded as a module. For example I get
(typing lsmod at the command prompt)
Module Size Used by Not tainted
maestro 34888 1 (autoclean)
appletalk 26692 12 (autoclean)
iptable_filter 2412 0 (autoclean) (unused)
ip_tables 15520 1 [iptable_filter]
parport_pc 19012 1
qcamvc_usb 5500 0 (autoclean)
qcamvc 15736 1 [qcamvc_usb]
the last two relate to my quickcam vc webcam
so to remove them I would type as root,
rmmod qcamvc and then rmmod qcamvc_usb
if you want to see how the system is detecting your camera, at the
command prompt type
tail -f /var/log/messages
which will display the messages log file as it is updated, again for
examples this is what I get when my usb camera is unplugged and plugged
back in: (carbon is just the host name of my computer)
Sep 8 19:16:39 carbon kernel: usb.c: USB disconnect on device
00:07.2-1.2 address 3
Sep 8 19:16:39 carbon kernel: QuickCam VC(USB) :video device
unregistered.
Sep 8 19:16:39 carbon kernel: Quickcam VC: Destroying a camera entry in
proc quickcam.
Sep 8 19:16:39 carbon kernel: QuickCam VC: unregistering video
Sep 8 19:16:46 carbon kernel: hub.c: new USB device 00:07.2-1.2,
assigned address 6
Sep 8 19:16:46 carbon kernel: qcamvc usb probe
Sep 8 19:16:46 carbon kernel: qcamvc usb probe 1
Sep 8 19:16:46 carbon kernel: qcamvc usb probe 2
Sep 8 19:16:46 carbon kernel: qcamvc usb probe 3
Sep 8 19:16:46 carbon kernel: Quickcam VC: Creating a camera entry in
proc quickcam.
Sep 8 19:16:46 carbon kernel: Quickcam dev struct in create_proc_qcamvc
cb7ef000
Sep 8 19:16:46 carbon kernel: qcamvc dev struct in qcamvc_init_done
cb7ef008
Sep 8 19:16:47 carbon kernel: Camera sucessfull registered
Sep 8 19:16:47 carbon kernel: qcamvc usb probe 4
Sep 8 19:16:47 carbon kernel: qcamvc usb probe 5
Sep 8 19:16:50 carbon /etc/hotplug/usb.agent: Setup qcamvc_usb for USB
product 478/1/100
you will see something similar or error messages if a driver can't be
found.
cheers
Johann
--
Johann Kwiatkowski <johann at spot-the-dog.com>
Spot The Dog Graphics P/L
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