Имхо сохрани xorg.conf под другим названием и сгенерируй новый через nvidia-xconfig
попробуй
https://www.linux.org.ru/forum/desktop/1812860
[ 243.515] (**) NVIDIA(0): Option "MetaModes" "2560x1440_60.00"
[ 243.516] (**) NVIDIA(0): Enabling 2D acceleration
[ 243.769] (--) NVIDIA(0): Valid display device(s) on GPU-0 at PCI:1:0:0
[ 243.769] (--) NVIDIA(0): CRT-0
[ 243.769] (--) NVIDIA(0): CRT-1
[ 243.769] (--) NVIDIA(0): DFP-0
[ 243.769] (--) NVIDIA(0): DFP-1 (boot)
[ 243.771] (II) NVIDIA(0): NVIDIA GPU GeForce GT 730 (GF108) at PCI:1:0:0 (GPU-0)
[ 243.771] (--) NVIDIA(0): Memory: 2097152 kBytes
[ 243.771] (--) NVIDIA(0): VideoBIOS: 70.08.ae.00.02
[ 243.771] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[ 243.774] (--) NVIDIA(GPU-0): CRT-0: disconnected
[ 243.774] (--) NVIDIA(GPU-0): CRT-0: 400.0 MHz maximum pixel clock
[ 243.774] (--) NVIDIA(GPU-0):
[ 243.775] (--) NVIDIA(GPU-0): CRT-1: disconnected
[ 243.775] (--) NVIDIA(GPU-0): CRT-1: 400.0 MHz maximum pixel clock
[ 243.775] (--) NVIDIA(GPU-0):
[ 243.778] (--) NVIDIA(GPU-0): DFP-0: disconnected
[ 243.778] (--) NVIDIA(GPU-0): DFP-0: Internal TMDS
[ 243.778] (--) NVIDIA(GPU-0): DFP-0: 330.0 MHz maximum pixel clock
[ 243.778] (--) NVIDIA(GPU-0):
[ 243.792] (--) NVIDIA(GPU-0): DELL P2416D (DFP-1): connected
[ 243.792] (--) NVIDIA(GPU-0): DELL P2416D (DFP-1): Internal TMDS
[ 243.792] (--) NVIDIA(GPU-0): DELL P2416D (DFP-1): 225.0 MHz maximum pixel clock
[ 243.792] (--) NVIDIA(GPU-0):
[ 243.796] (WW) NVIDIA(0): No valid modes for "2560x1440_60.00"; removing.
[ 243.796] (WW) NVIDIA(0):
[ 243.796] (WW) NVIDIA(0): Unable to validate any modes; falling back to the default mode
[ 243.796] (WW) NVIDIA(0): "nvidia-auto-select".
[ 243.796] (WW) NVIDIA(0):
[ 243.797] (II) NVIDIA(0): Validated MetaModes:
[ 243.797] (II) NVIDIA(0): "DFP-1:nvidia-auto-select"
[ 243.797] (II) NVIDIA(0): Virtual screen size determined to be 2048 x 1152
[ 243.801] (--) NVIDIA(0): DPI set to (98, 97); computed from "UseEdidDpi" X config
точно на нуво у вас вертикальная 60 выставляется?Не понял вопрос.
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"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "DELL P2416D"
HorizSync 29 - 113
VertRefresh 49 - 86
Option "DPMS"
Modeline "Mode 17" 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 0" 241.50 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync
Modeline "Mode 1" 148.500 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 2" 74.250 1920 2008 2052 2200 1080 1082 1087 1125 +hsync +vsync interlace
Modeline "Mode 3" 74.250 1280 1390 1420 1650 720 725 730 750 +hsync +vsync
Modeline "Mode 4" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
Modeline "Mode 5" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
Modeline "Mode 6" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace
Modeline "Mode 7" 27.000 1440 1464 1590 1728 576 578 581 625 -hsync -vsync interlace
Modeline "Mode 8" 25.200 640 656 752 800 480 490 492 525 -hsync -vsync
Modeline "Mode 9" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace
Modeline "Mode 10" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync
Modeline "Mode 11" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync
Modeline "Mode 12" 27.000 1440 1464 1590 1728 576 578 581 625 -hsync -vsync interlace
Modeline "Mode 13" 74.250 1280 1720 1760 1980 720 725 730 750 +hsync +vsync
Modeline "Mode 14" 74.250 1920 2448 2492 2640 1080 1082 1089 1125 +hsync +vsync interlace
Modeline "Mode 15" 148.500 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 16" 74.250 1920 2558 2602 2750 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 18" 74.25 1920 2008 2052 2200 540 542 547 562 +hsync +vsync interlace
Modeline "Mode 19" 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync
Modeline "Mode 20" 27.00 720 736 798 858 480 489 495 525 -hsync -vsync
Modeline "2560x1440_60.00" 311.83 2560 2744 3024 3488 1440 1441 1444 1490 -HSync +Vsync
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
Option "UseEDID" "FALSE"
VendorName "NVIDIA Corporation"
BoardName "GeForce GT 730"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-1"
Option "metamodes" "2560x1440_60.00"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
SubSection "Display"
Depth 24
Modes "2560x1440" "1920x1080"
EndSubSection
EndSection
Option "UseEDID" "FALSE"
после этого просто разрешение по умолчанию стало другим.This is read-edid version 3.0.2. Prepare for some fun.
Attempting to use i2c interface
No EDID on bus 1
No EDID on bus 2
No EDID on bus 3
No EDID on bus 4
No EDID on bus 5
No EDID on bus 6
2 potential busses found: 0 7
Will scan through until the first EDID is found.
Pass a bus number as an option to this program to go only for that one.
Bus 0 doesn't really have an EDID...
256-byte EDID successfully retrieved from i2c bus 7
Looks like i2c was successful. Have a good day.
Checksum Correct
Section "Monitor"
Identifier "DELL P2416D"
ModelName "DELL P2416D"
VendorName "DEL"
# Monitor Manufactured week 20 of 2016
# EDID version 1.3
# Digital Display
DisplaySize 530 300
Gamma 2.20
Option "DPMS" "true"
Horizsync 29-113
VertRefresh 49-86
# Maximum pixel clock is 280MHz
#Not giving standard mode: 1280x800, 60Hz
#Not giving standard mode: 1680x1050, 60Hz
#Not giving standard mode: 1920x1200, 60Hz
#Not giving standard mode: 1152x864, 75Hz
#Not giving standard mode: 1600x1200, 60Hz
#Not giving standard mode: 1280x1024, 60Hz
#Not giving standard mode: 1920x1080, 60Hz
#Extension block found. Parsing...
Modeline "Mode 17" 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 0" 241.50 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync
Modeline "Mode 1" 148.500 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 2" 74.250 1920 2008 2052 2200 1080 1082 1087 1125 +hsync +vsync interlace
Modeline "Mode 3" 74.250 1280 1390 1420 1650 720 725 730 750 +hsync +vsync
Modeline "Mode 4" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
Modeline "Mode 5" 27.027 720 736 798 858 480 489 495 525 -hsync -vsync
Modeline "Mode 6" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace
Modeline "Mode 7" 27.000 1440 1464 1590 1728 576 578 581 625 -hsync -vsync interlace
Modeline "Mode 8" 25.200 640 656 752 800 480 490 492 525 -hsync -vsync
Modeline "Mode 9" 27.027 1440 1478 1602 1716 480 484 487 525 -hsync -vsync interlace
Modeline "Mode 10" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync
Modeline "Mode 11" 27.000 720 732 796 864 576 581 586 625 -hsync -vsync
Modeline "Mode 12" 27.000 1440 1464 1590 1728 576 578 581 625 -hsync -vsync interlace
Modeline "Mode 13" 74.250 1280 1720 1760 1980 720 725 730 750 +hsync +vsync
Modeline "Mode 14" 74.250 1920 2448 2492 2640 1080 1082 1089 1125 +hsync +vsync interlace
Modeline "Mode 15" 148.500 1920 2448 2492 2640 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 16" 74.250 1920 2558 2602 2750 1080 1084 1089 1125 +hsync +vsync
Modeline "Mode 18" 74.25 1920 2008 2052 2200 540 542 547 562 +hsync +vsync interlace
Modeline "Mode 19" 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync
Modeline "Mode 20" 27.00 720 736 798 858 480 489 495 525 -hsync -vsync
Option "PreferredMode" "Mode 17"
EndSection
$ xrandr --newmode "2560x1440R" 241.50 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync
$ xrandr --addmode HDMI-0 2560x1440R
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: 31
Current serial number in output stream: 32
> xrandr --newmode "2560x1440_60" 312.25 2560 2752 3024 3488 1440 1443 1448 1493 -hsync +vsync
> xrandr --addmode HDMI-0 2560x1440_60
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: 31Current serial number in output stream: 32
По правде говоря оба предложенных вами варианта выглядят вполне приемлемыми в качестве ответа.
Могу точно сказать, что число идеальных совпадений само по себе роли не играет и скорее должны быть как можно ближе к заданным не сами значения, а их отношения друг к другу, как вы сами говорили - результат можно масштабировать. В общем, из предложенных вами метрик мне кажется, что оценка по сумме квадратов отклонений подходит лучше.