How to get external monitor use higher resolution (1280x1024)

Hallo!


I  would  like  to get my external TFT-monitor connected to my laptop to use a
full 1280x1024 resolution, at least when the laptop monitor is off.  I  posted
my problem before
(http://sourceforge.net/mailarchive/forum.php?thread_id=8971327&forum_id=2358)
but didn't get any replies yet, so I fear nobody has an idea, and  I  have  to
change  the  panel-probing  in the radeonfb-driver to force it to 1280 and see
what it does. What would I have to change? What variable stores the resolution
that is actually taken for displaying?
So  far I also tried vesafb-tng but that needs VBE3 (I have VBE2, and it seems
one cannot change that) to be able to change to 1280x1024.

Any help and hint appreciated also replies telling me it is  not  possible  at
any means.

Thanks a lot
Lynx




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