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

• Last updated: 2021/06/14
• Expects an Acer S271HL connected via DVI
• Expects Xorg (not Wayland)
• This removes the radeon DDX driver in order to force modesetting to be used

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

• Last updated: 2021/06/14
• Expects Xorg (not Wayland)

• This removes the amdgpu DDX driver in order to force modesetting to be used

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

• 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

• 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

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

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

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

• 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

• 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

• 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'

• 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"