Hi,

> I tried upgrading the driver yesterday to the 270.41.06 version but it didn't 
> make any difference, still only 100 Hz.  Are you using Windows or Linux?  
> We're using the 64-bit Linux driver.

We had the same problem initially with the Asus VG236 until we went
into nvidia-settings and turned off Force Full GPU Scaling for the
monitor under the GPU settings. Usually this option is unchecked for
standard 60 - 75Hz LCDs but I found this was checked for some reason,
unchecked it and then the monitor went blank momentarily and came
back. Then the refresh rate increased from 99.99Hz to 119.98Hz. The
information menu in the monitor itself also showed 120Hz. This has to
be applied for every user or you can copy ~/.nvidia-settings.rc to
other users' directories. The system is currently using the 260.19.26
linux 64 bit driver running CentOS5. Here's the xorg.conf :

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 260.19.26
(buildmeis...@swio-display-x86-rhel47-07.nvidia.com)  Mon Nov 29
01:13:18 PST 2010

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
    FontPath        "unix/:7100"
EndSection

Section "Module"
    Load           "dbe"
    Load           "extmod"
    Load           "type1"
    Load           "freetype"
    Load           "glx"
EndSection

Section "InputDevice"
    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/input/mice"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
    # generated from data in "/etc/sysconfig/keyboard"
    Identifier     "Keyboard0"
    Driver         "kbd"
    Option         "XkbLayout" "us"
    Option         "XkbModel" "pc105"
EndSection

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Ancor Communications Inc ASUS VG236"
    HorizSync       24.0 - 140.0
    VertRefresh     50.0 - 122.0
    #Option "ExactModeTimingsDVI" "TRUE"
    # 1920x1080 @ 120.00 Hz (GTF) hsync: 138.84 kHz; pclk: 368.76 MHz
    Modeline "1920x1080_120"  368.76  1920 2072 2288 2656  1080 1081
1084 1157  -HSync +Vsync
    # 1920x1080 @ 110.00 Hz (GTF) hsync: 126.61 kHz; pclk: 336.28 MHz
    Modeline "1920x1080_110"  336.28  1920 2072 2288 2656  1080 1081
1084 1151  -HSync +Vsync
    # 1920x1080 @ 100.00 Hz (GTF) hsync: 114.40 kHz; pclk: 302.02 MHz
    Modeline "1920x1080_100"  302.02  1920 2072 2280 2640  1080 1081
1084 1144  -HSync +Vsync
    # Monitor preferred modeline (60.0 Hz vsync, 67.5 kHz hsync, ratio
16/9, 95 dpi)
    #ModeLine "1920x1080" 148.5 1920 2008 2052 2200 1080 1084 1089
1125 +hsync +vsync
    ModeLine       "1920x1080" 148.500 1920 2008 2052 2200 1080 1084
1089 1125 +hsync +vsync
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "Quadro FX 3700"
    Option         "Stereo" "10"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "metamodes" "1920x1080_120 +0+0; 1920x1080_110
+0+0; 1920x1080_100 +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Extensions"
        Option      "Composite" "disable"
EndSection

###

I don't know if the modelines are actually necessary. The nvidia
driver usually recognizes metamodes such as 1920x1080_120.

HTH,
Sabuj Pattanayek

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