I have a box running Debian Etch, has a 1000MHz Athlon and Geforce 6800 graphics card, monitor is an Iiayama Vision Master Pro 454. This box happily runs at 1280 x 1084 85Hz.

I've built a new system, Intel Q6600 @ 2.4GHz, Geforce 9800 graphics card, same monitor (running through a KVM switch). I've downloaded Debian Lenny, installed an Nvidia kernel but Gnome's screen resolution utility doesn't offer any refresh rate higher than 77Hz for 1280 x 1084 screen size.

"dpkg-reconfigure xserver-xorg" never gets as far as configuring the screen, but exits after the keyboard questions.

I've got a better CPU and better graphics card, anyone know why I can't get the same performance from my monitor?

Old box uses KDM whereas the new one is on Gnome, in case that makes any difference.


SysA

Do any of the following commands shed any light ? they should query the monitor for it's capabilities.

xresprobe nvidia

ddcprobe

get-edid

milo:/home/robert# xresprobe nvidia
id: HM903DADTA
res: 1920x1440 1600x1200 1280x1024 1024x768 832x624 800x600 720x400 640x480
freq: 30-133 50-200
disptype: crt
milo:/home/robert# ddcprobe
vbe: VESA 3.0 detected.
oem: NVIDIA
vendor: NVIDIA Corporation
product: G92 Board - 03920051 Chip Rev
memory: 14336kb
mode: 640x400x256
mode: 640x480x256
mode: 800x600x16
mode: 800x600x256
mode: 1024x768x16
mode: 1024x768x256
mode: 1280x1024x16
mode: 1280x1024x256
mode: 320x200x64k
mode: 320x200x16m
mode: 640x480x64k
mode: 640x480x16m
mode: 800x600x64k
mode: 800x600x16m
mode: 1024x768x64k
mode: 1024x768x16m
mode: 1280x1024x64k
mode: 1280x1024x16m
edid:
edid: 1 3
id: 1942
eisa: IVM1942
serial: 02fb55db
manufacture: 5 2003
input: separate sync, composite sync, sync on green, analog signal.
screensize: 36 29
gamma: 1.990000
dpms: RGB, active off, suspend, standby
timing: 720x400@70 Hz (VGA 640x400, IBM)
timing: 720x400@88 Hz (XGA2)
timing: 640x480@60 Hz (VGA)
timing: 640x480@67 Hz (Mac II, Apple)
timing: 640x480@72 Hz (VESA)
timing: 640x480@75 Hz (VESA)
timing: 800x600@60 Hz (VESA)
timing: 800x600@72 Hz (VESA)
timing: 800x600@75 Hz (VESA)
timing: 832x624@75 Hz (Mac II)
timing: 1024x768@87 Hz Interlaced (8514A)
timing: 1024x768@70 Hz (VESA)
timing: 1024x768@75 Hz (VESA)
timing: 1280x1024@75 (VESA)
ctiming: 1600x1200@85
ctiming: 1280x1024@85
ctiming: 1024x768@85
ctiming: 1920x1440@85
dtiming: 1280x1024@99
monitorname: HM903DADTA
monitorrange: 30-133, 50-200
dtiming: 2048x1536@73
milo:/home/robert# get-edid
get-edid: get-edid version 1.4.1

Performing real mode VBE call
Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
Function supported
Call successful

VBE version 300
VBE string at 0x11110 "NVIDIA"

VBE/DDC service about to be called
Report DDC capabilities

Performing real mode VBE call
Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
Function supported
Call successful

Monitor and video card combination does not support DDC1 transfers
Monitor and video card combination supports DDC2 transfers
0 seconds per 128 byte EDID block transfer
Screen is not blanked during DDC transfer

Reading next EDID block

VBE/DDC service about to be called
Read EDID

Performing real mode VBE call
Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
Function supported
Call successful


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Get-edid ends up scrambled whether or not I connect the monitor direct to the box or through my KVM switch.

SysA

Hmm, a quick and dirty solution has been to copy the xorg.conf from the Etch box to the Lenny box, the screen has stopped flickering but the screen resolution utility now only offers a max of 55Hz for a 1280 x 1084 screen.

SysA

It looks like it indicates the monitor can operate in that mode..

Have you tried using a modeline ?















default@debianetch:~$ cat /etc/X11/xorg.conf

Section "Module"
Load "i2c"
Load "bitmap"
Load "ddc"
# Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "vbe"
Load "dbe"
# Load "Type1"
EndSection

Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc104"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "Emulate3Buttons" "true"
EndSection

Section "Device"
Identifier "nVidia Corporation NV40 [GeForce 6800]"
Driver "nvidia"

EndSection

Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 28-64
VertRefresh 43-60
EndSection

Section "Screen"
Identifier "Default Screen"
Device "nVidia Corporation NV40 [GeForce 6800]"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768"
EndSubSection
EndSection

Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection

Section "DRI"
Mode 0666
EndSection