LCD Monitors and Knoppix

**robbief** · 02-03-2003, 11:11 PM

Hi,
I have a Fujitsu Siemens LCD 15" model 38B1 and while Xserver is starting the monitor tell "frequency not supported"

My video card is Matrox G400 and it is well recognized during the loading of kernel..
I tried many cheat codes like setting resolution screen and xvrefresh but nothing seems to resolve this problem!

I can't understand why with notebook lcd screens Knoppix is good and with many LCD screen not at all.

I read another post about Sony Flatscreen with similar problems.

Can anyone help me?
thanks
Rob

**Ian Tindale** · 02-04-2003, 01:39 AM

That's odd. On this machine, it works fine on my similar TFT of the same size. They normally work ononly 60Hz by the way (which is not a disadvantage for LCD tech). In fact, it's the only machine/monitor in the house that Knoppix does work on. If it was down to the other two monitors, I'd have thrown Knoppix in the bin long ago - I'd never have got to see it at all, it only succeeds in shutting down the other monitors.

**laurentbon** · 02-04-2003, 05:58 PM

Exactly the same problem here with a flat screen "IIYAMA AS314UT"!

Whatever I try, it says 'input not supported', even starting with the option vga=normal whiwh should be the standardized output...

However, no problem to have it running on my laptop.

Any idea.?

**god** · 02-04-2003, 06:47 PM

booting in fail safe worked for me (dell ultrasharp flat-panel).

The only problem with that is now my mouse won't work (dell logitech usb optical wheelmouse)....

any help would be nice... I dont want to boot in failsafe all the time...

**god** · 02-07-2003, 07:43 AM

I got it working... I used "knoppix xmodule=vesa" and it worked.... It appears my monitor only supports vesa....

**robbief** · 02-08-2003, 10:57 PM

I tried xmodule =vesa and other settings like xvrefresh = 60 and both but nothing! My Fujitsu Siemens 38 B1 isn't good for Knoppix

Please Can you suggest anything else?

Thanks
Rob

**god** · 02-08-2003, 11:45 PM

I would get the manual out, or look up online what display modes it supports, and type "knoppix xmodule=XXXX" Where XXXX is the name of the module.

**Carlos_E_Morimoto** · 02-09-2003, 12:07 AM

Try "fb 1024x768" (without "knoppix", just fb 1024x768 at boot line) this works with my two LCD monitors

**god** · 02-09-2003, 12:14 AM

could it be possible than a combination of the two is in order? i.e. a vesa mode only and need the fb option too?

**yohanman** · 02-09-2003, 05:23 PM

This problem has to de with the differences between CRT-/LCD-monitors.

I think Knoppix tries to check the refreshrate of the monitor, but this works different on an LCD / TFT monitor.
There lies the problem I think...