Laptop LCD display resolution

[mrmcctt]

I have been unable to get my Gateway 400vxt laptop display resolution to 1024x768. The display is capable of this resolution but the highest resolution I am offered is 800x600. My laptop has a 15" screen uses the Intel 852 chipset.

This issue came up in an earlier post and one of the suggestions was to comment out the horiz and vertical synch lines in my xorg.conf file. I did this, restarted the system and the lines I commented were still there but replaced with active lines. This is an example of what I got:

Section "Monitor"
#HorizSync 31.5 - 37.9
#VertRefresh 50.0 - 70.0

Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "LCD Panel 1024x768"
HorizSync 31.5 - 37.9
VertRefresh 50.0 - 70.0
Option "dpms"
EndSection

Does anyone have a suggestion that would allow me to get the 1024x768 screen resolution? I am open to suggestions.

Thanks in advance.

[micha]

There is several possible solutions:

1. You can get the correct modeline of your screen in order to have the proper settings for it. Use the read_edid software:
http://john.fremlin.de/programs/linux/read-edid/

2. The horizontal and vertical refreshment frequencies are important. You cannot put whatever you want for these values. I recommand you to use Knoppix, first to test your monitor, and second to get some correct monitor settings. Knoppix is very good to "guess" monitor settings...

Hope it helps !

[CrystalCowboy]

Your HorizSync doesn't look wide enough to handle the frequency necessary for 1024x768 (at what refresh rate?) I don't have a Linux laptop to compare, but here's my values from a 15" VGA LCD monitor (native resolution 1024x768)

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "VE500"
DisplaySize 300 230
HorizSync 30.0 - 62.0
VertRefresh 50.0 - 75.0
Option "dpms"
EndSection

You also need to check the Modes line in the "Screen" section to be sure the appropriate resolution is available there:

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection

If it's not there, add it as above.

[megaprogman]

I just edited my xorg to those values and it worked perfectly.

Thanks!