blacklist i915

Author: randomizedcoder

laptops/t/configuration.nix

@@ -69,8 +69,15 @@
     #boot.kernelParams
     # https://github.com/tolgaerok/nixos-2405-gnome/blob/main/core/boot/efi/efi.nix#L56C5-L56C21
     kernelParams = [
-      "nvidia-drm.modeset=1"
-      "nvidia-drm.fbdev=1"
+      #"nvidia-drm.modeset=1"
+      #"nvidia-drm.fbdev=1"
+      # https://www.reddit.com/r/NixOS/comments/u5l3ya/cant_start_x_in_nixos/?rdt=56160
+      "nomodeset"
+    ];
+
+    blacklistedKernelModules = [
+      "nouveau"
+      "i915"
     ];
 
     # https://wiki.nixos.org/wiki/NixOS_on_ARM/Building_Images#Compiling_through_binfmt_QEMU
@@ -79,24 +86,25 @@
 
     extraModulePackages = with config.boot.kernelPackages; [
       v4l2loopback
-      nvidia_x11
+      #nvidia_x11
     ];
 
     # https://nixos.wiki/wiki/Libvirt#Nested_virtualization
     #extraModprobeConfig = "options kvm_intel nested=1";
     # https://gist.github.com/chrisheib/162c8cad466638f568f0fb7e5a6f4f6b#file-config_working-nix-L19
     extraModprobeConfig =
-      "options nvidia "
+      #"options nvidia "
+      ""
       + lib.concatStringsSep " " [
       # nvidia assume that by default your CPU does not support PAT,
       # but this is effectively never the case in 2023
-      "NVreg_UsePageAttributeTable=1"
+      #"NVreg_UsePageAttributeTable=1"
       # This is sometimes needed for ddc/ci support, see
       # https://www.ddcutil.com/nvidia/
       #
       # Current monitor does not support it, but this is useful for
       # the future
-      "NVreg_RegistryDwords=RMUseSwI2c=0x01;RMI2cSpeed=100"
+      #"NVreg_RegistryDwords=RMUseSwI2c=0x01;RMI2cSpeed=100"
       "options kvm_intel nested=1"
       # # https://nixos.wiki/wiki/OBS_Studio
       ''
@@ -132,8 +140,6 @@
   hardware.graphics = {
     enable = true;
     extraPackages = with pkgs; [
-      vdpauinfo             # sudo vainfo
-      libva-utils           # sudo vainfo
       # https://discourse.nixos.org/t/nvidia-open-breaks-hardware-acceleration/58770/2
       nvidia-vaapi-driver
       vaapiVdpau
@@ -142,6 +148,8 @@
       vdpauinfo
       libva
       libva-utils
+      # https://wiki.nixos.org/wiki/Intel_Graphics
+      #vpl-gpu-rt
     ];
   };
 
@@ -368,6 +376,8 @@
  	  # vdpauinfo
 	  # libva
     # libva-utils
+    vdpauinfo             # sudo vainfo
+    libva-utils           # sudo vainfo
   ];
 
   # Some programs need SUID wrappers, can be configured further or are

laptops/t/readme.md

@@ -0,0 +1,36 @@
+# readme
+
+
+## Nvidia nightmare
+
+Big thread, with feedback about my issue
+https://discourse.nixos.org/t/nvidia-open-breaks-hardware-acceleration/58770/25
+
+
+
+https://github.com/elFarto/nvidia-vaapi-driver/issues/311
+
+```
+[das@t:~/Downloads/nixpkgs]$ ls -la /dev/dri/
+total 0
+drwxr-xr-x   3 root root        140 Jan 30 22:16 .
+drwxr-xr-x  20 root root       4080 Jan 31 07:24 ..
+drwxr-xr-x   2 root root        120 Jan 30 22:16 by-path
+crw-rw----+  1 root video  226,   1 Jan 31 07:24 card1
+crw-rw----+  1 root video  226,   2 Jan 30 22:16 card2
+crw-rw-rw-   1 root render 226, 128 Jan 30 22:16 renderD128
+crw-rw-rw-   1 root render 226, 129 Jan 30 22:16 renderD129
+
+[das@t:~/Downloads/nixpkgs]$ ls -la /dev/dri/by-path/
+total 0
+drwxr-xr-x 2 root root 120 Jan 30 22:16 .
+drwxr-xr-x 3 root root 140 Jan 30 22:16 ..
+lrwxrwxrwx 1 root root   8 Jan 30 22:16 pci-0000:00:02.0-card -> ../card2
+lrwxrwxrwx 1 root root  13 Jan 30 22:16 pci-0000:00:02.0-render -> ../renderD129
+lrwxrwxrwx 1 root root   8 Jan 30 22:16 pci-0000:01:00.0-card -> ../card1
+lrwxrwxrwx 1 root root  13 Jan 30 22:16 pci-0000:01:00.0-render -> ../renderD128
+
+[das@t:~/Downloads/nixpkgs]$ lspci | grep VGA
+00:02.0 VGA compatible controller: Intel Corporation CometLake-H GT2 [UHD Graphics] (rev 05)
+01:00.0 VGA compatible controller: NVIDIA Corporation TU117GLM [Quadro T2000 Mobile / Max-Q] (rev a1)
+```