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Re: [LUG] Philips PVCV 840K on Debian Testing

 

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Simon Waters wrote:
|
| I've scheduled this for when I upgrade to 2.6, I think anyone else doing
| this would be well advised to go to a recent version of the 2.6 kernel
| immediately to get the best from the webcam. But I just need some images
| for a web page at the moment, so 2.6, and bandwidth hungry images can
| wait for me, beside ADSL don't get here till at least July :(

Okay got impatient.

Moving Debian testing from 2.4 kernel to 2.6 in a hurry...

Built a bespoke kernel with the 2.6.11 source tar ball using the Debian
kernel-package tools. Installed home make kernel-image package.

Installed package "module-init-tools"

Used the script in /usr/share/doc/module-init-tools/examples to build an
/etc/modprobe.conf.

Installed package "discover" to help with hardware detection now I have
2.6 package.

Installed package "udev" (not that it made much difference for what I'm
doing currently.

Cleaned up a few bits in /etc/rc*.d using update-rc.d

Downloaded and built the latest PWC driver from source as it is no
longer in the kernel. Once I resolve USB issues with the new kernel
(enabling USB support is a good start, but not enabling isn't as obvious
as you might expect).

insmod pwc.ko - as if by magic 640x480 webcam pictures from the 840K
looking good in camstream and gnomemeeting. Looking rubbish in gqcam,
just like the outstanding bug in gqcam in fact....

Okay one camera down one to go.

The 820K takes the ov511 drivers.

The kernel driver was a no hoper with this hardware. Downloaded the
lastest of the 1.x series from the maintainers site. Built and run and
got a decent image in "gqcam" but it refuses to play with gnomemeeting,
or camstream.

Not happy with this I tried the latest 2.x series drivers, which
required i2c (?!?!) support in the kernel. Oops rebuild again.

The 2.x drivers make the image from the 820K go wrong in gqcam, just
like it's big brother the 840K, but don't resolve the other issues, so I
backed down to the latest 1.x series drivers 1.65-1.11

Both sets of drivers I had to edit the source code for because the
kernel API changed between 2.6.10 and 2.6.11!


Conclusions ?


Well it isn't clear what is bad apps, and what is bad support, but
either way the end user experience sucks badly. Obviously commercially
people should sort these issues before claiming a camera is supported
but even with cameras with supposedly "good support" you disappear into
the minutae of compiling your own drivers to get even halfway decent
support.

(Fairly) recent software makes life a lot easier for configuring regular
peripherals, but there is still a long way to go.

It is easier to do a kernel upgrade from 2.4 to 2.6 than getting a PVCV
820K webcam to work well.
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