Boot time driver conflict

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Old 09-08-2010
Boot time driver conflict

I have a Microdia web cam. Some times it won't work if and only if there is a "HV7131R image sensor detected" statement in the boot up.
In this case when I try to get a .png snapshot all I get is a frame full of what appears to be white noise only it is mostly green.
Here is the command I am using:
TV="-tv driver=v4l2:device=/dev/video${vd}:width=320:height=240:norm=NTSC:chanlist=us-cable:input=0:noaudioSmilieutfmt=i420"
OUT="-fps 30 -cache 128"
PIC="-hue 0 -brightness 0 -contrast 0 -saturation 0 -aspect 4:3"
mplayer tv:// $TV $OUT $PIC -vf screenshot -vo xv,x11,
This does not work when ${vd} is 0 or 1 and it is using HV7131R.
If it is not using HV7131R it works properly.
I think I am getting either gspca or HV7131R usage defined at boot time. Is there a way to force either one so I can test?
Hope it is OK here as the problem occurs in my script.
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File::Type::WebImages(3pm)				User Contributed Perl Documentation				File::Type::WebImages(3pm)

File::Type::WebImages - determine web image file types using magic SYNOPSIS
use File::Type::WebImages 'mime_type'; my $type_1 = mime_type($file); my $type_2 = mime_type($data); DESCRIPTION
"mime_type()" can use either a filename, or file contents, to determine the type of a file. The process involves looking the data at the beginning of the file, sometimes called "magic numbers". THE BIG TRADE OFF
For minimum memory consumption, only the following common web image file types are supported: BMP, GIF, JPEG and PNG. ( image/bmp, image/gif, image/jpeg and image/png ). Unlike with File::Type and File::MMagic, 'undef', not "application/octet-stream" will be returned for unknown formats. Unlike File::Type, we return "image/png" for PNGs, not "image/x-png"; If you want more mime types detected use File::Type or some other module. TODO
It would be even better to have a pluggable system that would allow you to plug-in different sets of MIME-types you care about. SEE ALSO
File::Type. Similar, but supports over 100 file types. ACKNOWLEDGMENTS
File::Type::WebImages is built from a mime-magic file from The original can be found at <>. AUTHORS
Paul Mison <> - wrote original File::Type Mark Stosberg <> - hacked up this. COPYRIGHT
Copyright 2003-2004 Fotango Ltd. LICENSE
Licensed under the same terms as Perl itself. perl v5.10.1 2011-04-23 File::Type::WebImages(3pm)

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