Matrox G450 fbdev, v4l and TV-OUT question

[nihil <nihil0@freestart.hu>]

Hi!

I found out, that up to the kernel version 2.6.2 the setting of the
bright and contrast for the Matrox G450 TV-OUT doesn't work. However
it worked in 2.4.xx and also in 2.6.1.

I can get the values with:
~> v4lctl -c /dev/fb0 list
attribute  | type   | current | default | comment
-----------+--------+---------+---------+------------------------
norm       | choice | (null)  | (null)  |
input      | choice | (null)  | (null)  |
bright     | int    |     127 |     127 | range is 0 => 780
contrast   | int    |     127 |     127 | range is 0 => 1023
color      | int    |     165 |     165 | range is 0 => 255
hue        | int    |       0 |       0 | range is 0 => 255
test outpu | bool   | off     | off     |

But if I try to set a value, I get only an error message:
~> v4lctl -c /dev/fb0 bright 600
ioctl: VIDIOC_S_CTRL(id=9963776;value=600): Inappropriate ioctl for device

It is also the same for the contrast:
~> v4lctl -c /dev/fb0 contrast 800
ioctl: VIDIOC_S_CTRL(id=9963777;value=800): Inappropriate ioctl for device

What could be the problem? What is changed in the kernel from 2.6.1 to 2.6.2, 
that causes this problem? If this doesn't work anymore, how can I change the 
bright/contrast for the TV-OUT on the Matrox G450 card?

Thank you in advance!
nihil





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