[Qce-ga-discussion] Logitech Quickcam Express problem. Pl advice.

SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 454-5900

Dear Fellow Linux Enthusiasts,

I am facing problems with my webcam and am at a point where I desperately
need some new ideas to debug the problem.

Here is the story:

I am running Red Hat 2.4.20-8:

[root@]# uname -r
2.4.20-8

The video device is not getting detected:

[root@]# xawtv
This is xawtv-3.81, running on Linux/i686 (2.4.20-8)
can't open /dev/video0: No such device
v4l-conf had some trouble, trying to continue anyway
v4l2: open /dev/video0: No such device
v4l2: open /dev/video0: No such device
v4l: open /dev/video0: No such device
no video grabber device available
The video devices are there allright:

[root@]# cd /dev/
[root@]# ll * | grep vid
lrwxrwxrwx    1 root     root           11 Sep 12
22:52 video -> /dev/video0
crw-------    1 root     root      81,   0 Sep 12
22:52 video0

I thought the problem might be with the driver. Did I
mention that I
have a logitech webcam express and am using a qc-usb-0.5.1
driver. The driver is
compiled as a module using the following steps:

1. Set LINUX_DIR to point to Kernel source:

[root@]# setenv LINUX_DIR /usr/src/linux

2. make all:

[root@]# make clean && make all
rm -f *.o qcset show *~
cc -I/usr/src/linux/include -nostdinc -iwithprefix
include -DMODULE -D__KERNEL__ -DNOKERNEL  -O2 -fomit-frame-pointer
-fno-strict-aliasing -fno-common -Wall -Wstrict-prototypes -Wno-trigraphs
-pipe -c qc-driver.c In file included from qc-driver.c:47:
quickcam.h:64:2: warning: #warning "Kernels 2.4.19 and
2.4.20 are buggy! Be sure to install patch from:"
quickcam.h:65:2: warning: #warning
"http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch
<http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch> "
cc -I/usr/src/linux/include -nostdinc -iwithprefix
include -DMODULE -D__KERNEL__ -DNOKERNEL  -O2 -fomit-frame-pointer
-fno-strict-aliasing -fno-common -Wall -Wstrict-prototypes -Wno-trigraphs
-pipe -c qc-hdcs.c In file included from qc-hdcs.c:27:
quickcam.h:64:2: warning: #warning "Kernels 2.4.19 and
2.4.20 are buggy! Be sure to install patch from:"
quickcam.h:65:2: warning: #warning
"http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch
<http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch> "
cc -I/usr/src/linux/include -nostdinc -iwithprefix
include -DMODULE -D__KERNEL__ -DNOKERNEL  -O2 -fomit-frame-pointer
-fno-strict-aliasing -fno-common -Wall -Wstrict-prototypes -Wno-trigraphs
-pipe -c qc-pb0100.c In file included from qc-pb0100.c:27:
quickcam.h:64:2: warning: #warning "Kernels 2.4.19 and
2.4.20 are buggy! Be sure to install patch from:"
quickcam.h:65:2: warning: #warning
"http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch
<http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch> "
cc -I/usr/src/linux/include -nostdinc -iwithprefix
include -DMODULE -D__KERNEL__ -DNOKERNEL  -O2 -fomit-frame-pointer
-fno-strict-aliasing -fno-common -Wall -Wstrict-prototypes -Wno-trigraphs
-pipe -c qc-vv6410.c In file included from qc-vv6410.c:27:
quickcam.h:64:2: warning: #warning "Kernels 2.4.19 and
2.4.20 are buggy! Be sure to install patch from:"
quickcam.h:65:2: warning: #warning
"http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch
<http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch> "
cc -I/usr/src/linux/include -nostdinc -iwithprefix
include -DMODULE -D__KERNEL__ -DNOKERNEL  -O2 -fomit-frame-pointer
-fno-strict-aliasing -fno-common -Wall -Wstrict-prototypes -Wno-trigraphs
-pipe -c qc-formats.c In file included from qc-formats.c:31:
quickcam.h:64:2: warning: #warning "Kernels 2.4.19 and
2.4.20 are buggy! Be sure to install patch from:"
quickcam.h:65:2: warning: #warning
"http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch
<http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch> "
cc -I/usr/src/linux/include -nostdinc -iwithprefix
include -DMODULE -D__KERNEL__ -DNOKERNEL  -O2 -fomit-frame-pointer
-fno-strict-aliasing -fno-common -Wall -Wstrict-prototypes -Wno-trigraphs
-pipe -c qc-mjpeg.c In file included from qc-mjpeg.c:32:
quickcam.h:64:2: warning: #warning "Kernels 2.4.19 and
2.4.20 are buggy! Be sure to install patch from:"
quickcam.h:65:2: warning: #warning
"http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch
<http://www.ee.oulu.fi/~tuukkat/quickcam/linux-2.4.20-videodevfix.patch> "
cc -I/usr/src/linux/include -nostdinc -iwithprefix
include -DMODULE -D__KERNEL__ -DNOKERNEL  -O2 -fomit-frame-pointer
-fno-strict-aliasing -fno-common -Wall -Wstrict-prototypes -Wno-trigraphs
-pipe -c qc-memory.c ld -r -o quickcam.o qc-driver.o qc-hdcs.o qc-pb0100.o
qc-vv6410.o qc-formats.o qc-mjpeg.o qc-memory.o cc -Wall -O2 -s qcset.c -o
qcset

3. The drivers are loaded as follows:

[root@]#         mknod /dev/video0 c 81 0
mknod: `/dev/video0': File exists
[root@]#         chmod a+r /dev/video0
[root@]#         ln -s /dev/video0 /dev/video
ln: `/dev/video': File exists
[root@]# modprobe videodev
[root@]# modprobe usb-ohci
[root@]# insmod ./quickcam.o compatible=3

4. The patch is applied as follows:

[root@]# ln -s /usr/src/linux linux-2.4.20
[root@]# man patch
[root@]# patch -v < linux-2.4.20-quickcam.patch
patch 2.5.4
Copyright 1984-1988 Larry Wall
Copyright 1989-1999 Free Software Foundation, Inc.

This program comes with NO WARRANTY, to the extent
permitted by law.
You may redistribute copies of this program
under the terms of the GNU General Public License.
For more information about these matters, see the file
named COPYING.

written by Larry Wall and Paul Eggert
[root@]#

The lsmod output is given below:

Module                  Size  Used by    Not tainted
quickcam              102880   0  (unused)
videodev                8192   0  [quickcam]
parport_pc             18756   1  (autoclean)
lp                      8868   0  (autoclean)
parport                36480   1  (autoclean)
[parport_pc lp]
autofs                 12948   0  (autoclean) (unused)
sis900                 16524   1
ipt_REJECT              3896   6  (autoclean)
iptable_filter          2380   1  (autoclean)
ip_tables              14648   2  [ipt_REJECT
iptable_filter]
sg                     35980   0  (autoclean)
sr_mod                 17912   0  (autoclean)
ide-scsi               11984   0
ide-cd                 35196   0
cdrom                  33472   0  [sr_mod ide-cd]
keybdev                 2880   0  (unused)
mousedev                5428   1
hid                    21700   0  (unused)
input                   5792   0  [keybdev mousedev
hid]
usb-ohci               21160   0  (unused)
usb-uhci               25868   0  (unused)
ehci-hcd               19592   0  (unused)
usbcore                77696   1  [quickcam hid
usb-ohci usb-uhci ehci-hcd]
ext3                   69984   3
jbd                    51220   3  [ext3]
aic7xxx               139668   1
sd_mod                 13324   2
scsi_mod              106168   5  [sg sr_mod ide-scsi
aic7xxx sd_mod]

One more point:

My webcam was working yesterday. It stoped working
after I put in a IEEE1394
card. I removed the card but my webcam fails to
recover.

Pl help.

Thanking you in advance.

Regards,
Makarand.