How to change Nvidia refresh rate ?

[Phxone]

A newly linux user here

How do I set 60 refresh rate on 1600x900 on Nvidia 550ti on ubuntu 14.04 ?

I had install on nvidia nvidia-331, 331.38, 3.13.0-39-generic, x86_64: on ubuntu 14.04 and created a thread over the forum but I am not getting much reply for the fix.

http://ubuntuforums.org/showthread.php?t=2249608

desktop:~$  xrandr -s 1600x900 -r 60.0
Rate 60.0 Hz not available for this size

When I try to add

xrandr --newmode "1600x900_60.00"  118.25  1600 1696 1856 2112  900 903 908 934 -hsync +vsync

It add to an disconnected DVI-I-3 port where the DVI port connected is DVI_I-2

desktop:~$ xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 16384 x 16384
DVI-I-0 disconnected (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
DVI-I-2 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 287mm
   1920x1080      60.0*+
   1280x1024      75.0     60.0  
   1152x864       75.0  
   1024x768       75.0     60.0  
   800x600        75.0     60.3  
   640x480        75.0     59.9  
HDMI-0 disconnected (normal left inverted right x axis y axis)
DVI-I-3 disconnected (normal left inverted right x axis y axis)
  1600x900_60.00 (0x2d8)  118.2MHz
        h: width  1600 start 1696 end 1856 total 2112 skew    0 clock   56.0KHz
        v: height  900 start  903 end  908 total  934           clock   59.9Hz

More on the error log on

http://ubuntuforums.org/showthread.php?t=2249608

Appreciate anyone would help out

[Veske]

.config/monitors.xml

Change the refresh rate from there. I also gave up doing it with nvidia control panel. But bare in mind that if you use this, compiz does not detect your new refresh rate when you boot up, so go to compiz settings after every launch to set the compiz refresh to the same value.

[tuke81]

In mode validation nvidia drivers discards non edid modes by default. You should be able to get more display modes(resolutions) by just adding Option "ModeValidation" "AllowNonEdidModes" to the device section of xorg.conf. If you wanted to fine tune it Option "ModeValidation" "DVI-I-2: AllowNonEdidModes" allows nonedid modes only for monitor connected to DVI-I-2.

[Phxone]

In mode validation nvidia drivers discards non edid modes by default. You should be able to get more display modes(resolutions) by just adding Option "ModeValidation" "AllowNonEdidModes" to the device section of xorg.conf. If you wanted to fine tune it Option "ModeValidation" "DVI-I-2: AllowNonEdidModes" allows nonedid modes only for monitor connected to DVI-I-2.

How do I fine tune it ?

[chithanh]

After creating a new mode with xrandr, you need to add it to the monitor you want.

$ xrandr --addmode DVI-I-2 1600x900_60.00

However it is even better to put the modeline in X.org configuration:

Section "Monitor"
        Identifier "DVI-I-2"
        Modeline "1600x900_60.00"  118.25  1600 1696 1856 2112  900 903 908 934 -hsync +vsync
        Option "PreferredMode" "1600x900_60.00" # only if you want this mode to become default
EndSection

[tuke81]

How do I fine tune it ?

Maybe I wasn't clear enough. I tried to say that Option "ModeValidation" "AllowNonEdidModes" allows nonedid modes for all outputs, but if you use it with Option "ModeValidation" "DVI-I-2: AllowNonEdidModes", in mode validation non edid modes are allowed only for output called DVI-I-2.

After creating a new mode with xrandr, you need to add it to the monitor you want.

$ xrandr --addmode DVI-I-2 1600x900_60.00

However it is even better to put the modeline in X.org configuration:

Section "Monitor"
        Identifier "DVI-I-2"
        Modeline "1600x900_60.00"  118.25  1600 1696 1856 2112  900 903 908 934 -hsync +vsync
        Option "PreferredMode" "1600x900_60.00" # only if you want this mode to become default
EndSection

I'm not sure if he want's to use that resolution by default, gaming maybe but not for default. And I'm not sure does nvidia driver even recognize that option(it's not listed in xconfig options by nvidia readme). But there's no harm done with that configuration, to make use for that modeline one need to use that Option "ModeValidation" "AllowNonEdidModes" or nvidia driver's strict mode validation process will skip that modeline. I would personally give it try with that and try other modelines too i.e.

$ cvt -r 1600 900
# 1600x900 59.82 Hz (CVT 1.44M9-R) hsync: 55.40 kHz; pclk: 97.50 MHz
Modeline "1600x900R"   97.50  1600 1648 1680 1760  900 903 908 926 +hsync -vsync

Usually lcd modelines are with reduced blanking so you should always use that:

http://www.uruk.org/~erich/projects/cvt/

[Phxone]

Maybe I wasn't clear enough. I tried to say that Option "ModeValidation" "AllowNonEdidModes" allows nonedid modes for all outputs, but if you use it with Option "ModeValidation" "DVI-I-2: AllowNonEdidModes", in mode validation non edid modes are allowed only for output called DVI-I-2.



I'm not sure if he want's to use that resolution by default, gaming maybe but not for default. And I'm not sure does nvidia driver even recognize that option(it's not listed in xconfig options by nvidia readme). But there's no harm done with that configuration, to make use for that modeline one need to use that Option "ModeValidation" "AllowNonEdidModes" or nvidia driver's strict mode validation process will skip that modeline. I would personally give it try with that and try other modelines too i.e.

$ cvt -r 1600 900
# 1600x900 59.82 Hz (CVT 1.44M9-R) hsync: 55.40 kHz; pclk: 97.50 MHz
Modeline "1600x900R"   97.50  1600 1648 1680 1760  900 903 908 926 +hsync -vsync

Usually lcd modelines are with reduced blanking so you should always use that:
http://www.uruk.org/~erich/projects/cvt/

Thank you very much , I works with

"ModeValidation" "AllowNonEdidModes"
Modeline "1600x900R"   97.50  1600 1648 1680 1760  900 903 908 926 +hsync -vsync

You really safe my half a year time figuring out how to fix it.
I had tried the above xrandr numerous time finally cvt works


There are other things I still having problem , sometimes , the brightness on nvidia auto reset to 0 even I had set it to -0.25.It got reset when restart and playing youtube.
Can I set it permanent on xorg ?

[tuke81]

Glad to hear it works. For brightness etc. control are contolled by nvidia-settings, I'm not sure if you can force them from xorg.conf.

If you have single user, there should be .nvidia-settings-rc file in your home folder. The thing is with that config file, that you have to use nvidia-settings --load-config-only somewhere during DE start up(i.e. add that command to autostart).

[Phxone]

Glad to hear it works. For brightness etc. control are contolled by nvidia-settings, I'm not sure if you can force them from xorg.conf.

If you have single user, there should be .nvidia-settings-rc file in your home folder. The thing is with that config file, that you have to use nvidia-settings --load-config-only somewhere during DE start up(i.e. add that command to autostart).

Already have it loaded when I check at " startup application preference"
"sh -c '/usr/bin/nvidia-settings --load-config-only'"

What should I add in more during the startup command ?

[tuke81]

Already have it loaded when I check at " startup application preference"
"sh -c '/usr/bin/nvidia-settings --load-config-only'"

What should I add in more during the startup command ?

Yeah that should be enough. Quite odd if that does not work(maybe bug or some application might override brightness value).