• Various kernel options
• https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html

preempt='full' threadirqs nohz='off'

• https://forum.manjaro.org/t/how-to-choose-the-proper-acpi-kernel-argument/1405
• https://learn.microsoft.com/en-us/windows-hardware/drivers/acpi/winacpi-osi

acpi_osi='Linux'

acpi_osi='Windows 2017'

• https://fwupd.github.io/libfwupdplugin/hsi.html#org.fwupd.hsi.SuspendToIdle

mem_sleep_default='s2idle'

• iommu=off should not be used (source)

iommu='pt'

pci='pcie_bus_perf,realloc,pcie_scan_all,big_root_window'

intremap='off'

• For an Acer S271H7 even though it can do 75Hz, this option sets one of the display timings too-high and 75Hz can't be reduced-blanked here; 74Hz is close enough
• Necessary for Wayland, and also seemingly works as an alternative to xorg.conf on Xorg
• HDMI-A-1 is the same for an AMD 6600 XT and Intel UHD 630, it's possible this works for all GPUs?

video='HDMI-A-1:1920x1080@74'

• https://fwupd.github.io/libfwupdplugin/hsi.html#org.fwupd.hsi.EncryptedRam
• Requires CPU SVM to be enabled in BIOS ¹⁾
• Disable TSME in BIOS if using this

mem_encrypt='on'

• Allows use of Overdrive options for overclocking and increasing the Power Limit
• See amd_shared.h for more PP_FEATURE_MASK values
• 0xffffffff can be used to enable everything, but may cause issues with unstable features

sudo grubby --args='amdgpu.ppfeaturemask=0xfff7ffff' --update-kernel='ALL'

amdgpu.ppfeaturemask=0xfff7ffff

cat '/sys/module/amdgpu/parameters/ppfeaturemask'

i915.enable_fbc='0' i915.enable_psr='0' i915.panel_use_ssc='0' i915.nuclear_pageflip='1' i915.edp_vswing='2'

• TODO: HSI?

intel_iommu='on'

• This enables GuC and HuC firmware loading ²⁾

i915.enable_guc='3'

modprobe.blacklist='nouveau'

• https://github.com/NVIDIA/open-gpu-kernel-modules#compatible-gpus

nvidia.NVreg_OpenRmEnableUnsupportedGpus='1'

nvidia-drm.modeset='1'

• TODO: Find information about this

nvidia.NVreg_UsePageAttributeTable='1'

• https://us.download.nvidia.com/XFree86/Linux-x86_64/515.65.01/README/gsp.html
• Allows loading of GSP firmware
• This doesn't appear necessary for the open kernel module
• 2022/07/20 515.57: this caused AoE2:DE to crash GNOME on-startup

nvidia.NVreg_EnableGpuFirmware='1'

nvidia-smi -q | grep 'GSP'

• https://github.com/ckb-next/ckb-next/wiki/Troubleshooting#usbhid-quirks
• Seemingly only needed with the mouse plugged directly to the motherboard, and not through USB-C docks

usbcore.quirks='1b1c:1b75:bgmn'

• This is needed to relax permissions for Coreboot firmware to be flashed internally
• This should be removed after flashing

iomem='relaxed'