gspca in Linux 2.6.27

only works with v4l2, but not v4l. So it can lead to problems - programs using v4l gives strange pictures as well as annoying error messages.

My webcam worked with gspcav1 and Linux 2.6.26, but it failed in Linux 2.6.27 (with its in-kernel gspca drivers):
>>cmcapture err -1
cvsync err
: Invalid argument
cmcapture: Invalid argument

Solution: Install libv4l, and use a command like this:LD_PRELOAD=/usr/lib/libv4l/ skype.

Linux kernel bug #11860.

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