fix: screen flickering (disable PSR/-SU)

Swarsel · Dec 26, 2024 · ea6f9e9 · ea6f9e9
1 parent fbb8e23
commit ea6f9e9
Showing 1 changed file with 10 additions and 55 deletions.
diff --git a/hosts/nixos/nbl-imba-2/hardware-configuration.nix b/hosts/nixos/nbl-imba-2/hardware-configuration.nix
@@ -1,6 +1,3 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
 { config, lib, modulesPath, ... }:
 
 {
@@ -12,65 +9,23 @@
   boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "thunderbolt" "usb_storage" "cryptd" "usbhid" "sd_mod" "r8152" ];
   boot.initrd.kernelModules = [ ];
   boot.kernelModules = [ "kvm-amd" ];
+
+  # Fix screen flickering issue at the cost of battery life (disable PSR and PSR-SU, keep PR enabled)
+  # TODO: figure out if this is worth it
+  # test PSR/PR state with 'sudo grep '' /sys/kernel/debug/dri/0000*/eDP-2/*_capability'
+  # ref:
+  # https://old.reddit.com/r/framework/comments/1goh7hc/anyone_else_get_this_screen_flickering_issue/
+  # https://www.reddit.com/r/NixOS/comments/1hjruq1/graphics_corruption_on_kernel_6125_and_up/
+  # https://gitlab.freedesktop.org/drm/amd/-/issues/3797
+  boot.kernelParams = [ "amdgpu.dcdebugmask=0x410" ];
+
   boot.extraModulePackages = [ ];
   boot.initrd.luks.devices."cryptroot" = {
     # improve performance on ssds
     bypassWorkqueues = true;
     preLVM = true;
   };
 
-  # fileSystems."/" =
-  #   {
-  #     device = "/dev/disk/by-uuid/3554892c-9d0b-49b2-b74a-8b5ef45569f7";
-  #     fsType = "btrfs";
-  #     options = [ "subvol=root" ];
-  #   };
-
-  # boot.initrd.luks.devices."cryptroot".device = "/dev/disk/by-uuid/98b9bf76-ca01-49f5-91ee-1884ae9ce383";
-
-  # fileSystems."/boot" =
-  #   {
-  #     device = "/dev/disk/by-uuid/5236-F44A";
-  #     fsType = "vfat";
-  #   };
-
-  # fileSystems."/home" =
-  #   {
-  #     device = "/dev/disk/by-uuid/3554892c-9d0b-49b2-b74a-8b5ef45569f7";
-  #     fsType = "btrfs";
-  #     options = [ "subvol=home" ];
-  #   };
-
-  # fileSystems."/nix" =
-  #   {
-  #     device = "/dev/disk/by-uuid/3554892c-9d0b-49b2-b74a-8b5ef45569f7";
-  #     fsType = "btrfs";
-  #     options = [ "subvol=nix" ];
-  #   };
-
-  # fileSystems."/persist" =
-  #   {
-  #     device = "/dev/disk/by-uuid/3554892c-9d0b-49b2-b74a-8b5ef45569f7";
-  #     fsType = "btrfs";
-  #     options = [ "subvol=persist" ];
-  #   };
-
-  # fileSystems."/swap" =
-  #   {
-  #     device = "/dev/disk/by-uuid/3554892c-9d0b-49b2-b74a-8b5ef45569f7";
-  #     fsType = "btrfs";
-  #     options = [ "subvol=swap" ];
-  #   };
-
-  # fileSystems."/var/log" =
-  #   {
-  #     device = "/dev/disk/by-uuid/3554892c-9d0b-49b2-b74a-8b5ef45569f7";
-  #     fsType = "btrfs";
-  #     options = [ "subvol=log" ];
-  #   };
-
-  # swapDevices = [ ];
-
   # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
   # (the default) this is the recommended approach. When using systemd-networkd it's
   # still possible to use this option, but it's recommended to use it in conjunction