• Anything here expects Xorg and not Wayland
• Identifier will need changed for different display connections and drivers

• 99-graphics.conf

sudo mkdir -p '/etc/X11/xorg.conf.d' && sudo -e '/etc/X11/xorg.conf.d/99-graphics.conf'

• See Acer S271HL

• Last updated: 2022/05/18
• This expects modesetting

sudo mkdir -p '/etc/X11/xorg.conf.d' && sudo -e '/etc/X11/xorg.conf.d/99-graphics.conf'

Section "Monitor"
    Identifier "HDMI-1"
    Modeline "1920x1080_75"  167.85  1920 1928 1960 2000  1080 1105 1113 1119 +hsync -vsync
    Option "PreferredMode" "1920x1080_75"
EndSection

• https://blogshit.baka.fi/2020/07/xorg-custom-resolutions/
• https://download.nvidia.com/XFree86/Linux-x86_64/510.54/README/xconfigoptions.html

Section "Monitor"
    Identifier "S271HL-75Hz"
    Modeline "1920x1080_75"  167.85  1920 1928 1960 2000  1080 1105 1113 1119 +hsync -vsync
EndSection

Section "Screen"
    Identifier "Screen0"
    Option "ModeValidation" "HDMI-0: NoMaxPClkCheck,NoEdidMaxPClkCheck,NoHorizSyncCheck,NoVertRefreshCheck,AllowNonEdidModes"
    Monitor "S271HL-75Hz"
EndSection

• https://wiki.gentoo.org/wiki/30bpp
• https://wiki.archlinux.org/title/AMDGPU#10-bit_color
• The lack-of quotes around 30 is intentional and required syntax
• This may cause apps to crash

sudo -e '/etc/X11/xorg.conf.d/99-graphics.conf'

Section "Screen"
    Identifier      "Deep Color Screen"
    DefaultDepth    30
EndSection

• This may need changed to 0 instead for some distros

cat ~/'.local/share/xorg/Xorg.1.log' | grep 'Pixel depth'

cat ~/'.local/share/xorg/Xorg.1.log.old' | grep 'Pixel depth'

• Only use modesetting for Xorg DDX

• Coolbits at 28 unlocks all available overclocking settings

sudo -e '/etc/X11/xorg.conf.d/nvidia.conf'

Section "OutputClass"
    Identifier "nvidia"
    MatchDriver "nvidia-drm"
    Option "Coolbits" "28"
    Option "AllowUnofficialGLXProtocol" "1"
EndSection