Re: Webcam choice

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On Wed, 2006-11-08 at 17:54 +0000, Paul Howarth wrote:
> Anne Wilson wrote:
> > On Wednesday 08 November 2006 16:29, Paul Howarth wrote:
> >> Anne Wilson wrote:
> >>> On Wednesday 08 November 2006 15:59, Paul Howarth wrote:
> >>>> Anne Wilson wrote:
> >>>>> On Wednesday 08 November 2006 13:07, Paul Howarth wrote:
> >>>>>> Anne Wilson wrote:
> >>>>>>
> >>>>>> This problem has come up in relation to a bunch of out-of-tree kernel
> >>>>>> drivers since FC6 was released. The linux/config.h header file no
> >>>>>> longer exists and is not needed. You should be able to just delete the
> >>>>>> source line in the driver that references it (gspca_core.c line 36 I
> >>>>>> think).
> >>>>> OK - removed it, and make continued, apparently succeeding.  However,
> >>>>> attempting install gives me
> >>>>>
> >>>>> install -c -m 0644 gspca.ko /lib/modules/`uname
> >>>>> -r`/kernel/drivers/usb/media/ install: target
> >>>>> `/lib/modules/2.6.18-1.2798.fc6/kernel/drivers/usb/media/' is not a
> >>>>> directory: No such file or directory
> >>>>>
> >>>>> Do I simply create this directory?
> >>>> You could do, or you could install it into
> >>>> /lib/modules/2.6.18-1.2798.fc6/extra/ or maybe
> >>>> /lib/modules/2.6.18-1.2798.fc6/kernel/drivers/media/video/usbvideo/
> >>> I'm out of my depth, here, Paul.  Part of the makefile reads
> >>>
> >>> MODULE_INSTALLDIR =
> >>> /lib/modules/$(KERNEL_VERSION)/kernel/drivers/usb/media/
> >>> MODULE_INSTALLDIR2
> >>> = /lib/modules/$(KERNEL_VERSION)/kernel/drivers/media/video/
> >>>
> >>> default:
> >>> 	$(MAKE) -C $(KERNELDIR) SUBDIRS=$(PWD) CC=$(CC) modules
> >>>
> >>> install:
> >>> 	mkdir -p $(MODULE_INSTALLDIR)
> >>> 	rm -f $(MODULE_INSTALLDIR)spca5xx.ko
> >>> 	rm -f $(MODULE_INSTALLDIR2)gspca.ko
> >>> 	install -c -m 0644 gspca.ko $(MODULE_INSTALLDIR)
> >>> 	/sbin/depmod -ae
> >>>
> >>> Should I edit the MODULE_INSTALLDIR	to match the MODULE_INSTALLDIR2?  I
> >>> would have thought that they wouldn't have defined two separate ones if
> >>> they could both go in the same one.
> >>>
> >>> Sorry to sound naive - I am ;-)
> >> I'd suggest changing the /usb/media in MODULE_INSTALLDIR to
> >> /media/video/usbvideo
> >>
> > OK - last hurdle, I hope:
> > 
> > *** The "rpmbuild" program is not in your PATH!
> > 
> > This is root, of course.  I've found 
> > 
> > usr/lib/librpmbuild-4.4.so
> > 
> > so how do I append it to root's path?   I'm sure I should know this, but I 
> > just can't remember.
> 
> Um, what are you trying to do now? You don't need rpmbuild to build a 
> kernel module. Have you moved on to something else now>
> 
> Don't build RPMs as root anyway. You'll need the rpm-build package and 
> then you can build them as a regular user.
> http://www.city-fan.org/tips/CreateRPMBuildEnvironment
> 
> Paul.
> 
> 
It has occured to me that Anne may be experiencing a problem I had some
time ago with a different device.  The hub power supply was drooping.
In my case it happened just as I was firing up a new version of
software, so I wasn't too badly mislead, but the fact that the problem
arose just as I was working on the software led me down some pretty
dusty trails when all I really needed was a new "wall wart".  It was a
classic "Ohhh! C***! I can't believe it!  Days of work down the tubes!"
moment for me.

  I have since discovered that a few devices on USB will change their
current drains quite a bit depending on how the software sets them up
and abandons them.

Regards,
Les H

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