I solved this problem on your PC.
This problem xorg.conf file.
me hardware: "acer x243hd" and "gigabyte geforce gtx760"
cat xorg.conf !!!not work (640x480) this file gen nvidia-xconfig:
~$ cat /etc/X11/xorg.conf.nvidia-xconfig-original
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
EndSection
cat xorg.conf !!!work (1920x1080):
~$ cat /etc/X11/xorg.conf
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 30.0 - 80.0
VertRefresh 55.0 - 75.0
DisplaySize 400 225
Modeline "1920x1080_60.00" 172.80 1920 2040 2248 2576 1080 1081 1084 1118 -HSync +Vsync
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
BusID "PCI:1:0:0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1920x1080_60.00"
EndSubSection
EndSection
How get: Modeline "1920x1080_60.00" 172.80 192.... bla bla bla
~$ gtf 1920 1080 60
# 1920x1080 @ 60.00 Hz (GTF) hsync: 67.08 kHz; pclk: 172.80 MHz
Modeline "1920x1080_60.00" 172.80 1920 2040 2248 2576 1080 1081 1084 1118 -HSync +Vsync
add this in Section "Monitor" and do not forget to add in Section "Screen" -> SubSection "Display" string Modes "1920x1080_60.00"
To summarize:
- Specify the correct HorizSync and VertRefresh
- Gen and add you Modeline
- Add name Modeline in Modes
Thank you all for your attention!!!