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--- notes:kernel_parameters [2024/01/22 23:48] – [Low-Latency] Sean Rhone
+++ notes:kernel_parameters [2024/04/29 17:12] (current) – Sean Rhone
@@ Line 1: / Line 1: @@
+====== Information ======
+  * Various kernel options
+  * https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
 ====== General ======
@@ Line 15: / Line 20: @@
   acpi_osi='Windows 2017'
+==== Spinesnap ====
+  * :!: 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 ((with ''dmesg'' Intel HID 5 button array seemingly isn't presented with Windows OSI))
+  acpi_osi='!' acpi_osi='Windows 2017'
+===== Reboot =====
+  * Does hard reboots
+  * :!: ''reboot=efi'' causes a Dell Latitude 5591 to not reboot
+  reboot='pci'
+  reboot='efi'
 ===== Modern Standby =====
@@ Line 42: / Line 63: @@
 ===== Custom Resolution =====
-  * 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
+  * https://docs.kernel.org/fb/modedb.html
-  * 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'
+  * Necessary for Wayland, and also works on Xorg as an alternative to ''xorg.conf''
+  * :?: ''HDMI-A-1'' is the same for an AMD 6600 XT and Intel UHD 630; it's possible this works for all GPUs or there's some standard?
+==== Acer S721HL ====
+  * Increase refresh rate for 1080p from default 60Hz to 75Hz
+  video='HDMI-A-1:1920x1080MR@75'
+==== TCL 55S405 ====
+  * Solves instability on some AMD GPUs at 4K@60Hz on HDMI
+  * 2024/04/29: From old notes and untested
+  video='HDMI-A-1:3840x2160MR@60'
 ====== AMD ======
@@ Line 77: / Line 110: @@
 ====== Intel ======
+===== i915 =====
+****
+  i915.enable_fbc='0' i915.enable_psr='0' i915.panel_use_ssc='0' i915.nuclear_pageflip='1'
 ===== IOMMU =====