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Monitor/Display

4K@60Hz RB

4k@60Hz CVT-RB
Fixes unstable HDMI at 4K@60Hz, and overly-bright colors on DisplayPort
The grep here confirms the expected Modeline ¹⁾
This cannot be used on Wayland currently
This expects amdgpu DDX driver to be used ²⁾

cvt --verbose --reduced '3840' '2160' '60' | grep 'Modeline "3840x2160R"  533.00  3840 3888 3920 4000  2160 2163 2168 2222 +hsync -vsync'

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

Section "Monitor"
    Identifier      "HDMI-A-0"
    Modeline "3840x2160R"  533.00  3840 3888 3920 4000  2160 2163 2168 2222 +hsync -vsync
    Option          "PreferredMode" "3840x2160R"
EndSection

Deep Color

The lack-of quotes around 30 is intentional and required syntax
This may cause minor issues with programs not expecting 30-bit color ³⁾
This can cause games in Wine to not start under some circumstances ⁴⁾
There is no known benefit to enabling this as of 2019/10/22

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

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

DDX

amdgpu

sudo dnf install 'xorg-x11-drv-amdgpu' -y && sudo -e '/etc/X11/xorg.conf.d/99-graphics.conf'

Section "OutputClass"
    Identifier  "AMD Graphics"
    MatchDriver "amdgpu"
    Driver      "amdgpu"
    Option      "DRI"       "3"
    Option      "TearFree"  "0"
EndSection

intel

sudo dnf install 'xorg-x11-drv-intel' -y && sudo -e '/etc/X11/xorg.conf.d/99-graphics.conf'

Section "OutputClass"
    Identifier  "Intel Graphics"
    MatchDriver "i915"
    Driver      "intel"
    Option      "DRI"       "3"
    Option      "TearFree"  "0"
EndSection

nouveau

sudo dnf install 'xorg-x11-drv-nouveau' -y && sudo -e '/etc/X11/xorg.conf.d/99-graphics.conf'

Section "OutputClass"
    Identifier  "NVIDIA Graphics"
    MatchDriver "nouveau"
    Driver      "nouveau"
    Option      "DRI"       "3"
EndSection

intel + nouveau

For Optimus laptops

sudo dnf install xorg-x11-drv-intel xorg-x11-drv-nouveau -y && sudo -e '/etc/X11/xorg.conf.d/99-graphics.conf'

Section "OutputClass"
    Identifier  "Intel Graphics"
    MatchDriver "i915"
    Driver	"intel"
    Option	"DRI"       "3"
    Option	"TearFree"  "0"
EndSection

Section "OutputClass"
    Identifier  "NVIDIA Graphics"
    MatchDriver "nouveau"
    Driver	"nouveau"
    Option	"DRI"       "3"
EndSection

radeon

Expects pre-SI GPUs ⁵⁾
For SI, CIK, and newer GPUs, use amdgpu, along with enabling si_support and cik_support respectively for the amdgpu kernel module ⁶⁾

sudo dnf install 'xorg-x11-drv-ati' -y && sudo -e '/etc/X11/xorg.conf.d/99-graphics.conf'

Section "OutputClass"
    Identifier  "AMD Graphics"
    MatchDriver "radeon"
    Driver      "radeon"
    Option      "DRI"               "3"
    Option      "SwapbuffersWait"   "0"
    Option      "TearFree"          "0"
    Option      "AccelMethod"       "EXA"
EndSection

Nightwane

The Modeline expects an Acer S271HL monitor to be used over DVI

sudo dnf install 'xorg-x11-drv-ati' -y && sudo -e '/etc/X11/xorg.conf.d/99-graphics.conf'

Section "Monitor"
    Identifier  "DVI-1"
    Modeline "1920x1080_75"  164.61  1920 1944 1976 2008  1080 1083 1088 1093 +hsync +vsync
    Option      "PreferredMode" "1920x1080_75"
EndSection

Section "OutputClass"
    Identifier  "AMD Graphics"
    MatchDriver "radeon"
    Driver      "radeon"
    Option      "DRI"               "3"
    Option      "SwapbuffersWait"   "0"
    Option      "TearFree"          "0"
    Option      "AccelMethod"       "EXA"
EndSection

NVIDIA Proprietary

Environment Variables

Sets pre-rendered frames from the default to 1
Apparently reduces CPU usage for desktop environments rendered with the NVIDIA GPU

echo 'export __GL_MaxFramesAllowed=1' | sudo tee '/etc/profile.d/nvidia-custom.sh' > '/dev/null' && cat '/etc/profile.d/nvidia-custom.sh'

sudo -e '/etc/profile.d/nvidia-custom.sh'

Disable PRIME Render Offload

Offloading Graphics Display with RandR 1.4
Required if planning to use external displays
Coolbits is not required here, but may be useful

sudo cp -p '/usr/share/X11/xorg.conf.d/nvidia.conf' '/etc/X11/xorg.conf.d/nvidia.conf' && sudo -e '/etc/X11/xorg.conf.d/nvidia.conf'

        Option "PrimaryGPU" "yes"
        Option "Coolbits" "28"

¹⁾

if grep reports nothing, use whatever is reported instead

²⁾

modesetting has a 4K RB resolution without any settings require on Xorg

³⁾

GpuTest's fur ring doesn't render right, RS's NXT client's splash screen is gray

⁴⁾

FFXIV crashes on start-up due to a DirectX error

⁵⁾

HD6000 series and lower, and non-SI HD7000 series

⁶⁾

see modinfo -p amdgpu

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