Unable to add a custom resolution using xrandr

Support Graphics & Display
1

Hello,

The issue I am having is that I am completely unable to add a custom resolution using xrandr. I am using an NVIDIA GPU - GTX 1050ti with proprietary drivers. I am using KDE Plasma as my desktop environment. Running kernel 5.15.2-2

The way I’m trying to add the custom resolution and the errors that it outputs are as follows.

 gtf 1280 720 75                                                                                                                              ✔ 

  # 1280x720 @ 75.00 Hz (GTF) hsync: 56.40 kHz; pclk: 95.65 MHz
  Modeline "1280x720_75.00"  95.65  1280 1352 1488 1696  720 721 724 752  -HSync +Vsync

xrandr --newmode "1280x720_75.00"  95.65  1280 1352 1488 1696  720 721 724 752  -HSync +Vsync

xrandr --addmode DVI-D-0 "1280x720_75.00"                                                                                                    ✔ 
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  18 (RRAddOutputMode)
  Serial number of failed request:  37
  Current serial number in output stream:  38

I have also tried using a different name inside the quotes for the name of the mode but still see the same error. I have also tried the standard 60hz as apposed to 75hz and still the same. Here is the code from this.

gtf 1280 720 60                                                                                                                            1 ✘ 

  # 1280x720 @ 60.00 Hz (GTF) hsync: 44.76 kHz; pclk: 74.48 MHz
  Modeline "1280x720_60.00"  74.48  1280 1336 1472 1664  720 721 724 746  -HSync +Vsync

xrandr --newmode "720" 74.48  1280 1336 1472 1664  720 721 724 746  -HSync +Vsync   

xrandr --addmode DVI-D-0 "720"                                                                                                               ✔ 
X Error of failed request:  BadMatch (invalid parameter attributes)
  Major opcode of failed request:  140 (RANDR)
  Minor opcode of failed request:  18 (RRAddOutputMode)
  Serial number of failed request:  37
  Current serial number in output stream:  38

I also received an error message yesterday when trying to add this custom resolution, however I haven’t been able to reproduce it and I’m not sure what I’m doing differently now.

X Error of failed request: BadName (named color or font does not exist)

Any help is appreciated, please just ask if you’d like some more info from me.

Thanks

2

Add the output of xrandr to your post, please :smiley:
Also check this post out.
Finally try using cvt instead of gtf.

Quick tip

When using xrandr to add custom resolutions it can take a long time and can be frustrating, so I wrote this one-line command that gets the output of gtf/cvt, makes the new mode, adds that mode to your output and then sets that output’s mode to the new one.
Basically this:

> gtf/cvt 1280 720 75
# 1280x720 @ 75.00 Hz (GTF) hsync: 56.40 kHz; pclk: 95.65 MHz
  Modeline "1280x720_75.00"  95.65  1280 1352 1488 1696  720 721 724 752  -HSync +Vsync
> xrandr --newmode "1280x720_75.00"  95.65  1280 1352 1488 1696  720 721 724 752  -HSync +Vsync
> xrandr --output DVI-D-0 --mode "1280x720_75.00"

In one line:

#CVT
deviceName="DVI-D-0" && CVT=$(cvt 1280 720 75 | tail -1 | cut -d ' ' -f2-) && modeName=$(echo $CVT | cut -d ' ' -f1) && xrandr --newmode $CVT && xrandr --addmode $modeName $deviceName && xrandr --output $deviceName --mode $modeName

#GTF
deviceName="DVI-D-0" && GTF=$(gtf 1280 720 75 | tail -1 | cut -d ' ' -f2-) && modeName=$(echo $CVT | cut -d ' ' -f1) && xrandr --newmode $GTF && xrandr --addmode $modeName $deviceName && xrandr --output $deviceName --mode $modeName

Note: I haven’t tested this code properly, but it should work. Just change the values of the variables accordingly.

3

Unfortunately none of the advice from that post helped :confused:

I tried using cvt instead of gtf for the inputs of the modeline string, but same error. Here is my xrandr output. Thanks

Screen 0: minimum 8 x 8, current 1280 x 1024, maximum 32767 x 32767
DVI-D-0 connected primary 1280x1024+0+0 (normal left inverted right x axis y axis) 380mm x 300mm
   1280x1024     60.02*+  75.02  
   1024x768      75.03    70.07    60.00  
   800x600       75.00    72.19    60.32  
   640x480       75.00    72.81    59.94  
HDMI-0 disconnected (normal left inverted right x axis y axis)
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
4