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notes:xorg.conf_snippets

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

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
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
notes/xorg.conf_snippets.txt · Last modified: 2019/11/30 22:18 by Sean Rhone