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I'm trying to add my own resolution, 1280x720 75Hz on my Nvidia card.

I've only come across this one method using xrandr, where you use cvt to get the parameters for your resolution and refresh rate, input it with xrandr --newmode, and then use xrandr --addmode to your display output. However, I get this error at the --newmode step:

$ sudo xrandr --newmode "1280x720_75.00"   95.75  1280 1360 1488 1696  720 723 728 755 -hsync +vsync
X Error of failed request:  BadName (named color or font does not exist)
Major opcode of failed request:  140 (RANDR)
Minor opcode of failed request:  16 (RRCreateMode)
Serial number of failed request:  53
Current serial number in output stream:  53

What's the problem and how can I fix it?

Zanna
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Paragraph
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  • Is it possible that you are creating a resolution that your monitor will not work in? It would be good if you could get all of the resolutions possible for your particular monitor at 75HZ. – Craig Mar 13 '18 at 23:45
  • No, it's a possible resolution in my Windows 10 install (running dualboot), and my monitor's native resolution is 1920x1080. It should 100% work. – Paragraph Mar 14 '18 at 00:52
  • What version of Ubuntu and what driver ? xrandr does not work with wayland (17.10) or the nvidia driver. See https://askubuntu.com/questions/377937/how-to-set-a-custom-resolution and post the output of cvt with the resolution you want – Panther Mar 14 '18 at 03:27

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