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Old 06-20-2003, 11:27 AM   #1
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TFT monitor problems

I m having problems with the configuration of my monitor. I am running SuSE 8.2 and I have a LG Flatron L1710B TFT monitor (a 17" TFT basically). SuSE doesnt have the drivers for this model of monitor so I am running the screen with VESA setting. My problem is that using the DVI input I can only run the display at 1024x786 and I want to run it at its native resolution of 1280x1024. When I try to set the resolution to 1280x1024 @ 60Hz the screen goes all crazy. I think (but not entirely sure!) that there is something wrong with the refresh rate, either the horizontal or vertical.

If I use the D-SUB input it will run at 1280x1024 @ 75Hz no problem.

Has anybody any ideas because the picture quailty at 1280x1024 using the DVI input is very good, nice and sharp and i m desperate to get it working properly.

Old 06-22-2003, 01:26 PM   #2
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Registered: Apr 2003
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Distribution: Slack 9.1,10 Mandrake 10,10.1, FedCore 2,3, Mepis 2004, Knoppix 3.6,3.7, SuSE 9.1, FreeBSD 5.2
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have you tried generating a custom modeline for it? you'll need to know the actual specs of your monitor and video card. here's a link:
Old 06-23-2003, 08:12 PM   #3
Registered: Oct 2002
Location: Richmond, VA
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Yeah, the standard drivers aren't all that great at handling DVI stuff. What video card do you have? If its an NVidia, try loading the official drivers from them and seeing what happens.
Old 06-24-2003, 02:41 PM   #4
Registered: Feb 2003
Location: Dagenham, Essex, Britain
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Vid Sync on TFTs

I had this problem with my TFT. (XIOD Samsung-OEM 17") There are two lines in your XF86Config-4 file which determine the range of values for Vertical Refresh and Horizontal Sync. Your ideal setting may be out of range.

If you have a dual boot with Windows, go into Windows and press the monitor's onscreen menu, there should be an information setting, which displays the two figures. In my case the HorizSync needed for the 75Hz display was not in range, so I increased the range to the next whole number, restarted X and all was well!

If you don't have Windows you'll have to find out some other way.

Of course if you use a range which is too large, you may well fry your monitor, so take care!

Old 06-24-2003, 05:52 PM   #5
Registered: Apr 2003
Distribution: Gentoo
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The problem is that the monitor setup utility in SuSE is utter rubbish. I can't remember if there's a way to supply it with your own values for horizontal and vertical sync, but if there is, you should look up the appropriate values in the manual that came with your monitor and enter these.

The silly thing is, IIUC, the values are completely irrelevant for DVI, so this is very hackish.
Old 10-12-2003, 12:43 PM   #6
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This monitor support only 60 Hz in DVI, in 1280*1024

If someone have a working XF86Config I want it

(I'm on FreeBSD 5.1 but it should works)



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