Hi,

This is a bug with a combination of the xserver-xorg-i810 driver and
totem (-xine and -gstreamer backends). I'll attach two logs to
illustrate:

1. xvattr_boot.log - xvattr output after a fresh reboot
2. xvattr_gstreamer.log - xvattr output after playing a movie in totem 
(-gstreamer). Note that using the totem-xine causes the same difference as in 
this log.

A "fix" is to run "xvattr -a XV_COLORKEY -v 66046;xvattr -a XV_CONTRAST
-v 64" *during* movie playback in totem to restore the proper defaults
and give a good quality picture. Setting it beforehand won't work, and
running totem again will reset the values back to bad non-default
values.

I have two separate systems running Edgy (although I've had this same
problem with Dapper too), both with Intel chipsets (865G and 945G). On
the latter system I use DVI input, but I tested analog and it's the
same, so it's a software issue.

I installed an NVIDIA card in my older system, and never experience such
a bug, nor have I seen any problems with my old Inspiron 8000 laptop
with a Mobility M4 (ati/r128) chipset.

Why am I sure it's totem's fault? Do a fresh reboot and immediately play
a movie in vlc (using Xvideo output) or "mplayer -vo xv" and you'll see
that the xvattr variables are untouched - and picture quality is fine;
only totem seems to change these values once started and thus create
problems with picture quality (until proper defaults are re-set).

** Attachment added: "xvattr output immediately following reboot"
   http://librarian.launchpad.net/4532752/xvattr_boot.log

-- 
Xv movies on 810/i945 gives horrible color, Gamma
https://launchpad.net/bugs/32963

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