• Various kernel options
• https://docs.kernel.org/admin-guide/kernel-parameters.html
• https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt
• https://www.kernel.org/doc/Documentation/fb/modedb.rst

• 2024: systemd-boot doesn't handle typewriter apostrophes 'like this' , but GRUB handles it fine ¹⁾
• 2024/05/18: systemd-boot on oS TW doesn't delete old initrds automatically, doesn't handle typewriter apostrophes, doesn't support dracut.conf settings, and doesn't seem faster than GRUB

• https://fwupd.github.io/libfwupdplugin/hsi.html#org.fwupd.hsi.SuspendToIdle
• iommu=off should not be used (source)
• https://docs.kernel.org/fb/modedb.html
• https://fwupd.github.io/libfwupdplugin/hsi.html#org.fwupd.hsi.EncryptedRam

• https://www.infradead.org/~mchehab/kernel_docs/admin-guide/pm/cpuidle.html#idle-states-control-via-kernel-command-line
• https://docs.kernel.org/admin-guide/pm/cpuidle.html
• https://community.intel.com/t5/Software-Tuning-Performance/Benchmark-performance-increases-with-deeper-C-states-linux/td-p/1051623

• 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

• Dell Latitude 5591 needs ! also to force Windows OSI
• 2024/04/29: Forcing Windows OSI causes brightness buttons on the built-in keyboard to not function ²⁾

acpi_osi='!' acpi_osi='Windows 2017'

• openSUSE Tumbleweed (GNOME)
• 2025/07/20

acpi_osi='Linux' reboot='pci' idle='halt' nohz='off' preempt='full' iommu='pt' pci='nocrs,pcie_bus_perf,realloc,pcie_scan_all,big_root_window' pcie_aspm='off' pcie_port_pm='off' ahci.mobile_lpm_policy='1' iwlmvm.power_scheme='1' nvme_core.default_ps_max_latency_us='0' nvme.noacpi='1' nowatchdog modprobe.blacklist='iTCO_wdt' tsc='nowatchdog' snd_hda_intel.power_save='0' usbcore.autosuspend='-1' i915.mitigations='off' i915.enable_fbc='0' i915.enable_psr='0' i915.enable_dc='0' i915.enable_guc='3' i915.guc_log_level='0' i915.nuclear_pageflip='1' rootflags='data=writeback'

acpi_osi='Linux' reboot='pci' nohz='off' preempt='none' cpuidle.off='1'

enable_mtrr_cleanup iomem='relaxed' pcie_ports='native' pci='nocrs,pcie_bus_perf,realloc,pcie_scan_all,big_root_window'

i915.enable_fbc='0' i915.enable_psr='0' i915.panel_use_ssc='0' i915.enable_guc='3' i915.guc_log_level='0' i915.nuclear_pageflip='1' i915.enable_hangcheck='0'

• 2025/08/08: openSUSE cannot have either mitigations option set on the text line through YaST ³⁾

mitigations='off' i915.mitigations='off'

nvme.noacpi='1' nvme.poll_queues='4' nvme.use_threaded_interrupts='1'

nowatchdog modprobe.blacklist='iTCO_wdt' tsc='nowatchdog' ahci.mobile_lpm_policy='1' iwlmvm.power_scheme='1' nvme_core.default_ps_max_latency_us='0' pcie_aspm='off' pcie_port_pm='off' snd_hda_intel.power_save='0' usbcore.autosuspend='-1'

video='HDMI-A-1:1920x1080MR@75'

swiotlb='noforce' iommu='force' intel_iommu='on'

rootflags='data=writeback'

threadirqs

idle=halt

mem_sleep_default='s2idle'

intremap='off'

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'

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
• 2024/09/30: Without that quirk, mouse failed immediately after setting preempt=none from a USB-C dock

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