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#1 2015-10-27 19:33:38

WhiteWing
Member
Registered: 2015-10-27
Posts: 4

Nvidia refresh rate problem

Hello.
I want to set up refresh rate to 75Hz.
I used several options for xorg.conf from Wiki, but after reboot it always restores old settings. Also tried to use nvidia-settings, no result.

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 355.11  (buildmeister@swio-display-x86-rhel47-07)  Wed Aug 26 17:14:39 PDT 2015

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
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"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "LG Electronics L192WS"
    HorizSync       30.0 - 83.0
    VertRefresh     56.0 - 75.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 750"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    SubSection     "Display"
        Depth       24
	Modes      "1440x900_75"
    EndSubSection
EndSection
[    33.884] (II) This device may have been added with another device file.
[    36.590] (--) NVIDIA(GPU-0): LG Electronics L192WS (CRT-0): connected
[    36.590] (--) NVIDIA(GPU-0): LG Electronics L192WS (CRT-0): 400.0 MHz maximum pixel clock
[    36.590] (--) NVIDIA(GPU-0): 
[    36.590] (--) NVIDIA(GPU-0): DFP-0: disconnected
[    36.590] (--) NVIDIA(GPU-0): DFP-0: Internal TMDS
[    36.590] (--) NVIDIA(GPU-0): DFP-0: 330.0 MHz maximum pixel clock
[    36.590] (--) NVIDIA(GPU-0): 
[    36.590] (--) NVIDIA(GPU-0): DFP-1: disconnected
[    36.590] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[    36.590] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[    36.590] (--) NVIDIA(GPU-0): 
[    36.723] (II) NVIDIA(0): Setting mode "VGA-0: nvidia-auto-select @1440x900 +0+0 {ViewPortIn=1440x900, ViewPortOut=1440x900+0+0}"
[    38.282] (--) NVIDIA(GPU-0): LG Electronics L192WS (CRT-0): connected
[    38.282] (--) NVIDIA(GPU-0): LG Electronics L192WS (CRT-0): 400.0 MHz maximum pixel clock
[    38.282] (--) NVIDIA(GPU-0): 
[    38.283] (--) NVIDIA(GPU-0): DFP-0: disconnected
[    38.283] (--) NVIDIA(GPU-0): DFP-0: Internal TMDS
[    38.283] (--) NVIDIA(GPU-0): DFP-0: 330.0 MHz maximum pixel clock
[    38.283] (--) NVIDIA(GPU-0): 
[    38.283] (--) NVIDIA(GPU-0): DFP-1: disconnected
[    38.283] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[    38.283] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[    38.283] (--) NVIDIA(GPU-0): 
[   261.313] (II) NVIDIA(0): Setting mode "DPY-0:1440x900_75+0+0"
[   261.739] (--) NVIDIA(GPU-0): LG Electronics L192WS (CRT-0): connected
[   261.739] (--) NVIDIA(GPU-0): LG Electronics L192WS (CRT-0): 400.0 MHz maximum pixel clock
[   261.739] (--) NVIDIA(GPU-0): 
[   261.739] (--) NVIDIA(GPU-0): DFP-0: disconnected
[   261.739] (--) NVIDIA(GPU-0): DFP-0: Internal TMDS
[   261.739] (--) NVIDIA(GPU-0): DFP-0: 330.0 MHz maximum pixel clock
[   261.739] (--) NVIDIA(GPU-0): 
[   261.739] (--) NVIDIA(GPU-0): DFP-1: disconnected
[   261.739] (--) NVIDIA(GPU-0): DFP-1: Internal TMDS
[   261.739] (--) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
[   261.739] (--) NVIDIA(GPU-0):

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#2 2015-10-27 22:24:22

dragonn
Member
Registered: 2012-05-04
Posts: 65

Re: Nvidia refresh rate problem

Add to your startup:

/usr/bin/nvidia-settings -l

This will load you saved settings from nvidia-settings.

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#3 2015-10-28 08:45:46

mauritiusdadd
Member
From: Benevento, Italy
Registered: 2013-10-27
Posts: 776

Re: Nvidia refresh rate problem

Hi WhiteWing and welcome to the forums big_smile

First of all, is 1440x900_75 a mode provided by the EDID of your monitor or are you trying to use a custom refresh rate? What is the output xrandr?

Note that usually you cannot change the refresh rate to an arbitrary value,  you can only choose among the values listed by xrandr for each resolution. If you want to use a custom refresh rate you have to add a new modeline to your xorg.conf (see https://wiki.archlinux.org/index.php/Xr … esolutions). And if you are unable to add a new modeline most probably you have to set to false the option UseEdid in the [Device] section of your xorg.conf.

About me - github

-- When you have eliminated the impossible, whatever remains, however improbable, must be the truth -- Spock | Sherlock Holmes

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#4 2015-10-28 12:05:04

WhiteWing
Member
Registered: 2015-10-27
Posts: 4

Re: Nvidia refresh rate problem

dragonn wrote:

Add to your startup:

/usr/bin/nvidia-settings -l

This will load you saved settings from nvidia-settings.

Do you mean to use /etc/profile?

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#5 2015-10-28 12:49:00

WhiteWing
Member
Registered: 2015-10-27
Posts: 4

Re: Nvidia refresh rate problem

mauritiusdadd wrote:

Hi WhiteWing and welcome to the forums big_smile

First of all, is 1440x900_75 a mode provided by the EDID of your monitor or are you trying to use a custom refresh rate? What is the output xrandr?

Note that usually you cannot change the refresh rate to an arbitrary value,  you can only choose among the values listed by xrandr for each resolution. If you want to use a custom refresh rate you have to add a new modeline to your xorg.conf (see https://wiki.archlinux.org/index.php/Xr … esolutions). And if you are unable to add a new modeline most probably you have to set to false the option UseEdid in the [Device] section of your xorg.conf.

It's EDID 

Screen 0: minimum 8 x 8, current 1440 x 900, maximum 16384 x 16384
VGA-0 connected primary 1440x900+0+0 (normal left inverted right x axis y axis) 410mm x 256mm
   1440x900      59.89*+  74.98  
   1280x1024     75.02    60.02  
   1024x768      75.03    70.07    60.00  
   800x600       75.00    72.19    60.32    56.25  
   640x480       75.00    72.81    59.94  
DVI-D-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)

For me this xrandr command works just fine. 

sudo  xrandr --output VGA-0 --mode 1440x900 --rate 75

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#6 2015-10-28 15:46:02

mauritiusdadd
Member
From: Benevento, Italy
Registered: 2013-10-27
Posts: 776

Re: Nvidia refresh rate problem

WhiteWing wrote:

It's EDID

then using nvidia-settings -l as suggested by dragonn should work, however

WhiteWing wrote:
sudo  xrandr --output VGA-0 --mode 1440x900 --rate 75

why are you using sudo? That command should not work unless you are running X as root (which is a bad thing)... How do you start X?

About me - github

-- When you have eliminated the impossible, whatever remains, however improbable, must be the truth -- Spock | Sherlock Holmes

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#7 2015-10-31 11:27:16

WhiteWing
Member
Registered: 2015-10-27
Posts: 4

Re: Nvidia refresh rate problem

mauritiusdadd wrote:
WhiteWing wrote:

It's EDID

then using nvidia-settings -l as suggested by dragonn should work, however

WhiteWing wrote:
sudo  xrandr --output VGA-0 --mode 1440x900 --rate 75

why are you using sudo? That command should not work unless you are running X as root (which is a bad thing)... How do you start X?

I wrote "sudo" accidentally. By the way, adding nvidia-settings -l to autostart didn't work

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#8 2015-10-31 12:10:31

mauritiusdadd
Member
From: Benevento, Italy
Registered: 2013-10-27
Posts: 776

Re: Nvidia refresh rate problem

mauritiusdadd wrote:

How do you start X?

About me - github

-- When you have eliminated the impossible, whatever remains, however improbable, must be the truth -- Spock | Sherlock Holmes

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