[Linux-fbdev-users] Radeon Mobility M9 with external TFT-monitor

[<lyn...@fr...>]

Hallo!


I have a Laptop with a Radeon Mobility M9 graphics card that has an external vga
connector.  I  got a new TFT-Monitor with 1280x1024 resolution and would like to
use its full resolution with a console framebuffer so that  I  have  160x64  for
text  with the laptop monitor switched off. The problem I got is that the laptop
monitor is only 1024x768 and when  radeonfb  probes everything it is taking this
smaller  resolution  from  the  bios  panel even if the laptop monitor is off. I
tried to change it with video=radeonfb:1280x1024@75  for  the  kernel  but  that
yielded  a  1280x1024 with a view port of only 1024x768. With that I mean on the
left and bottom the parts bigger than 1024x768 are not shown. This  is  only  on
the first console. On the others I have just a usual 1024x768.
I  also  tried video=vesafb:ywrap,mtrr vga=0x31A but then the external is saying
"freq. out of range" which should be 75Hz I think but vesafb is always at  60Hz.
The laptop monitor has a grayening effect...
I   had   a   look   in   the  sources  but  do  not  understand  much.  Is  the
video=radeonfb:1280x1024@75 right for the  radeon  driver?  I  took  the  aty128
readme  because  there is none for the radeon driver. Is there a way to override
the bios panel data so that I finally get what I want?
Under X I can get a resolution of 1280x1024 on the external and 1024x768 on  the
internal  monitor  so from that I think I can assume my graphics card can handel
the higher resolution.
I tried also to change the mode with "fbset -v lynx" to:
mode "lynx"
    # D: 78.653 MHz, H: 59.949 kHz, V: 75.694 Hz
    geometry 1280 1024 1280 1024 8
    timings 7812 216 40 48 2 64 4  # 128 MHz, 80.0 kHz, 74.2 Hz
endmode

timings are from videogen -fb but fbset -i shows that nothing changed.

In  the  framebuffer HOWTO I read about getting the external monitor showing a
different tty than the internal with con2fb. I'd really love that but I  don't
know  how to get the external connector being assosiated with /dev/fb1 as it's
all just one graphics-card. Can that be achiefed some how?

My System: LFS 5.1.1 or SuSE 8.1

Thanks a lot for any help or hints
Lynx