Config File

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

Computer-Specific

Oak

Last updated: 2021/06/14
Expects an Acer S271HL connected via DVI
Expects Xorg (not Wayland)
On Fedora, this removes the radeon DDX driver in order to use modesetting instead

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

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

Nightwane

Last updated: 2021/06/14
Expects Xorg (not Wayland)
On Fedora, this removes the amdgpu DDX driver in order to use modesetting instead

sudo dnf remove 'xorg-x11-drv-amdgpu'

Monitor/Display

4K@60Hz Reduced Blank

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 doesn't work on Wayland (use a kernel option instead)
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 zypper install -y 'xf86-video-amdgpu'

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 zypper install -y 'xf86-video-intel'

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 zypper install -y 'xf86-video-nouveau'

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 zypper install -y xf86-video-intel xf86-video-nouveau

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⁾
Using the radeon DDX driver caused StepMania to crash with any fullscreen mode on openSUSE TW
This caused a blinking black screen and GDM unable to start on Ubuntu 20.04.1
Overall, probably shouldn't use the radeon DDX driver

sudo zypper install -y 'xf86-video-ati'

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

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
This expects Fedora and RPM Fusion's NVIDIA driver package for the cp of nvidia.conf

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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