Cannot get 75hz on TFT monitor

[Erik Ahlner]

Hello!

Thanks for your reply. Though, i have already managed to solve the problem.
The solution was to add the following in xorg.conf:
Option "ExactModeTimingsDVI" "true"

Read my post "RESOLVED: Cannot get 75hz on TFT monitor (via DVI)" if you 
like :)

Regards,
Erik Ahlner

Geller Sandor wrote:

> On Mon, 31 Oct 2005, Erik Ahlner wrote:
>
>> Anyway, this is not the question whether it's sufficient for me or 
>> not, it's a serious BUG imo. The monitor handles 75hz (According to 
>> specs, which also has been successfully used in Windows via DVI and 
>> in Linux only via VGA), but Xorg refuses to deliver 75hz via DVI!
>> With no changes whatsoever to xorg.conf, just switching from DVI 
>> output&input to VGA output&input, I get 75Hz.
>
>
> I have a ViewSonic VP171b-2 with a Radeon 9200, I think you have 
> almost the same config.
>
> Add the following line to the Device section:
>
>     Option "IgnoreEDID" "true"
>
> And these lines to the Monitor section:
>
>     HorizSync   30 - 82.0
>     VertRefresh 50-85
>
>     # 133 MHz, 80.8 kHz, 75.0 Hz
>     Modeline "1280x1024" 132.59 1280 1320 1384 1640 1024 1026 1030 1078
>
>     # 80 MHz, 60.6 kHz, 75.0 Hz
>     Modeline "1024x768" 79.51 1024 1056 1120 1312 768 770 773 808
>
>     # 49 MHz, 47.4 kHz, 75.0 Hz
>     Modeline "800x600" 48.54 800 824 888 1024 600 602 604 632
>
> Of course you can generate your own modelines, I generated these with 
> videogen -m=1280x1024 -mdc=140 -mhf=82 -mvf=85 -dvf=75
>
> Regards,
>
>   Geller Sandor <wildy at petra.hos.u-szeged.hu>
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