cannot get a resolution to 1280x1024

chadypu · 06-06-2005, 07:59 PM

im on a big 19 inch dell monitor (the p991) which i know can do atleast 1280x1024 at 75 or 85khz

the only way to get my resolution to 1280x1024 is to edit the xorg.conf file to have a vertical refresh rate of 60 or lower, and that kills my eyes

here is some of my xorg.conf

Code:

Section "Monitor"

    Identifier  "UltraScan P911"

# HorizSync is in kHz unless units are specified.
# HorizSync may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.

    HorizSync   64,50-60

#    HorizSync	30-64         # multisync
#    HorizSync	31.5, 35.2    # multiple fixed sync frequencies
#    HorizSync	15-25, 30-50  # multiple ranges of sync frequencies

# VertRefresh is in Hz unless units are specified.
# VertRefresh may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY.  REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.

    VertRefresh 70-100
    
EndSection


# **********************************************************************
# Graphics device section
# **********************************************************************

# Any number of graphics device sections may be present

# Standard VGA Device:

Section "Device"
    Identifier	"RivaTNT2"
    VendorName	"Nvidia"
    BoardName	"Unknown"

# The chipset line is optional in most cases.  It can be used to override
# the driver's chipset detection, and should not normally be specified.

#    Chipset	"generic"

# The Driver line must be present.  When using run-time loadable driver
# modules, this line instructs the server to load the specified driver
# module.  Even when not using loadable driver modules, this line
# indicates which driver should interpret the information in this section.

    Driver     "svga"
# The BusID line is used to specify which of possibly multiple devices
# this section is intended for.  When this line isn't present, a device
# section can only match up with the primary video device.  For PCI
# devices a line like the following could be used.  This line should not
# normally be included unless there is more than one video device
# intalled.

#    BusID      "PCI:0:10:0"

#    VideoRam	256

#    Clocks	25.2 28.3

EndSection

# Device configured by xorgconfig:

Section "Device"
    Identifier  "** NVIDIA (generic)                   [nv]"
    Driver      "nvidia"
    VideoRam    32768
    # Insert Clocks lines here if appropriate
EndSection


# **********************************************************************
# Screen sections
# **********************************************************************

# Any number of screen sections may be present.  Each describes
# the configuration of a single screen.  A single specific screen section
# may be specified from the X server command line with the "-screen"
# option.
Section "Screen"
    Identifier  "Screen 1"
    Device      "** NVIDIA (generic)                   [nv]"
    Monitor     "UltraScan P911"
    DefaultDepth 24

    Subsection "Display"
        Depth       8
        Modes       "1280x1024"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       16
        Modes       "1280x1024" "1152x864" "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
    Subsection "Display"
        Depth       24
        Modes       "1280x1024" "1152x864" "1024x768" "800x600" "640x480"
        ViewPort    0 0
    EndSubsection
EndSection

i have current nvidia drivers installed to, (7174, i think) and i can tell they are working because i see the nvidia splash screen

any help would be greatly appreciated

Brian1 · 06-06-2005, 08:17 PM

There is a tool out there that if you supply the specs of the monitor it should produce the need info to insert into the xorg.conf file. I cannot remember it right now. If I do I will post.

Another thought is to boot up with a live CD like knoppix and see if you can change the settings to the way you want it and then look at its xorg.conf and compare.

Brian1

Bruce Hill · 06-06-2005, 08:19 PM

You need both the proper HorizSync and VertRefresh for your monitor.
Check the manufacturer of you monitor, or it's manual.

chadypu · 06-06-2005, 08:31 PM

http://support.dell.com/support/edoc...91/en/spec.htm

those are the specs

it gives an 'optimal' res of 1280 x 1024 at 85 Hz
in the table it shows a horizontal res of something like 80-90hz

so it should run at those resolutions

ill look into knoppix to check if it works in that

killerbob · 06-06-2005, 09:02 PM

According to Dell's specs page, your horizontal and vertical refresh numbers are way off. That *will* prevent you from using the monitor's upper resolutions and refresh rates.

I'd suggest you run through xorgconfig and set them correctly....

Bruce Hill · 06-06-2005, 09:15 PM

Quote:

Originally posted by chadypu
http://support.dell.com/support/edoc...91/en/spec.htm

those are the specs

it gives an 'optimal' res of 1280 x 1024 at 85 Hz
in the table it shows a horizontal res of something like 80-90hz

so it should run at those resolutions

ill look into knoppix to check if it works in that

Forget Knoppix...that's a waste of time, and not necessary.
Set the Vert to 48 - 120 and the Horz to 30 -107
If that looks good at 1280 x 1024, then issue "xrandr" and
see what you get for the values, like this:

Code:

mingdao@james:~$ xrandr
 SZ:    Pixels          Physical       Refresh
*0   1024 x 768    ( 302mm x 232mm )  *75   70   60  
 1    800 x 600    ( 302mm x 232mm )   75   72   60   56  
 2    640 x 480    ( 302mm x 232mm )   75   73   60  
 3    832 x 624    ( 302mm x 232mm )   75  
 4    512 x 384    ( 302mm x 232mm )   75   70   60  
 5    416 x 312    ( 302mm x 232mm )   75  
 6    400 x 300    ( 302mm x 232mm )   75   72   60   56  
 7    320 x 240    ( 302mm x 232mm )   75   73   60  
Current rotation - normal
Current reflection - none
Rotations possible - normal 
Reflections possible - none
mingdao@james:~$

Then you can adjust your rates if need be, or you could just
use the table Dell published, and start with 1280 x 1024 with
Horizontal 91.2 Vertical 85.0

This is all more trial and error in *nix than in Windoze, where
you have that config screen that let's you adjust them via a
GUI rather than in a term. No matter, you'll get it right soon.
You're a Slacker, mate, so do it in a term. ;-)

And btw...don't reboot your computer when you make these
changes, just restart the X server. Either via your WM/DE's
menu, or with Ctrl+Alt+Bksp

chadypu · 06-06-2005, 09:47 PM

thanks chinaman!
even gotting it working at 1600x1200!

Bruce Hill · 06-06-2005, 10:24 PM

Quote:

Originally posted by chadypu
thanks chinaman!
even gotting it working at 1600x1200!

Good on yah! I'm happy, too!

My little 15" LCD won't go above 1024x768. Looks like a postage stamp...I'm envious :-)

snickwad · 06-07-2005, 12:53 AM

Hi, glad you are sorted.

I used this:- http://www.sh.nu/nvidia/gtf.php to generate a custom modeline entry for my xorg.conf, as despite entering the correct horz and vert frequency, I could not get the refresh rates I knew I should have available at the higher resolutions. Now get 1280 x 1024 at the max refresh of 85hz.