I have the same problem... my hardware is a desktop IBM Netvista
6290-14J and it cames with an Intel Corporation
82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (Driver
i810 1.4.xx). My Flat screen is a Hyvision MV141 14"
(http://www.megavisionsys.com/products2_specs.asp?model=MV141)

I had a refresh rate problem that I solved adding this line to my
xorg.conf ("monitor" section):

# V-freq: 60.00 Hz  // h-freq: 47.80 KHz
Modeline "1024x768" 60.80  1024 1056 1128 1272   768  768  770  796

But now I have this problem when I play videos... they look too much
bright. My xvattr shows this:

Found Xv 2.2
Adaptor: 0
Name: Intel(R) Video Overlay
 Port: 73
  Name: XV_COLORKEY
   Flags: XvGettable XvSettable
   Min value: 0
   Max value: 16777215
   Current value: 66046
  Name: XV_BRIGHTNESS
   Flags: XvGettable XvSettable
   Min value: -128
   Max value: 127
   Current value: -1
  Name: XV_CONTRAST
   Flags: XvGettable XvSettable
   Min value: 0
   Max value: 255
   Current value: 127

When I open gxvattr and set up my HV_CONTRAST to 55 it seems to fix the
problem but soon after I open any other video player (vlc, totem,
mplayer,gxine or firefox with totem-xine-firefox-plugin) the problem
came back (HV_CONTRAST reset to 127).

I am following this bug report and I would like to know if anyone found
the permanent solution. (I want to make sure that xserver-xorg-
video-i810 1.6.3-1 wont break my system).

Sorry for my bad english I am not native speaker.

C.Rendon

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

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