Trouble with display on a laptop

[TnT]

Hi, I just installed Mandrake 8.1 on a laptop and I can't get the display fully correct. I'm a newbie so I'm using the Control Center in Mandrake. I know my video chipset (CT65548) which is supported and I've read the documentation for C&T chips on XFree.org. I know the LCD display (Hitachi LMG9910ZWCC), but this isn't in the list of monitors.

The only generic monitor I can get to work is the SVGA 800x600 @56hz, but the display is only showing on the left 2/3 of the screen and the refresh rate is horrible (the CT can do dotclock of 80Mhz). In the extra options the FixPanelSize and UseModeline don't work and DacSpeed isn't showing. Don't really know what else to do, and any help would be appreciated.

Thanks,
Thien

[dmason]

alright, I did some seaching, and here is a list of specs that I figured matched what you stated closest:

 Chips and Technology, C&T 65548, 208 Pin, PQFP
11.3" DSTN SVGA LMG9910ZWCC/Hitachi
LCD Display resolution 800x600 256 colors
External CRT resolution 1024x768 256 colors
Supports simultaneous LCD & CRT

I found this off of a site that displayed some specs for an nec laptop with a similar graphics chip and lcd. So the reason I think that it does that is that it will only support that kind of res, I would try upping the refresh just a little to see what would happen, but on the lcd, it looks like 800x600 is the limit. I hope that this helps.

[kewlcat]

Tnt,

Does the Mandrake X config utility offer a generic LCD panel 800x600? This is what I use for my laptop screen (1024x768 in my case).

If not, edit your XF86Config file and remove the lines that start with "HorizSync" and "VertRefresh". Also remove any resolutions apart from the native one for your LCD (800x600), down in the "Modes".

Hope that helps,
Rahul

[TnT]

Yeah none of those worked, but I found a site that used a slightly newer model then the one I had. It had the same video chipset and LCD display, and he figured out how to set it up. I used his modelines and they worked perfectly.

Thanks for the replies though