xorg open driver and ati card Radeon 9200 agp

Simon Thum simon.thum at gmx.de
Sun Oct 30 09:04:30 PDT 2011

Hi Valter,

I had this problem long ago with a very similar configuration. It
vanished when Alex Deucher modified some details (like rounding) in the
Radeon mode setting/calculation code.

I don't know about the details, but maybe you can copy the modeline
generated by the proprietary driver and force the open-source radeon to
use it. But I'm not sure it's possible, and even if I don't know how to
do it ;)

In my case, the problem also did depend on the LCD - perhaps you can
check other models.



On 10/29/2011 06:52 PM, Valter Giovannetti wrote:
> Hi.
> Excuse me for my bad english!
> I am a newcomer to Ubuntu and Italian!
> On my computer I have an ATI Radeon 9200 AGP- RV280 chip.
> The Operating Systems are: Windows XP and Ubuntu 11.04.
> In WindowsXP all work ok.
> Everything works fine with Ubuntu, 3D acceleration, if I use the VGA
> output.
> Apart from the top rows in windows, when I move.
> But the DVI output does not work well, if I try to move, enlarge a
> window, the monitor turns off and on again.
> As if the video signal disappear.
> I searched various forums how to fix the problem, but nobody could help me.
> By installing the proprietary driver, present in the repositories,
> everything works fine, but 3D acceleration vanishes.
> Can you helpme?
> Thank you.
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