Lenovo IdeaCentre K330

lenovo/ideacentre/k330/README.md

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+# Lenovo IdeaCentre K330
+
+The specific system I took for reference has the following hardware configuration:
+
+- Intel Core i7 2600
+- NVIDIA GeForce GT 545 [Latest supported (proprietary) driver (390.xx)](https://www.nvidia.com/en-us/drivers/details/196213/)
+- Some SSD (originally had a Seagate Barracuda hard drive)
+
+This hardware configuration was motivated by #1297
+
+I recommend enabling xserver instead of trying to use Wayland. As documented in the above linked issue, using Wayland with this rather old hardware lead to the system freezing after a short time of operation.
+
+```nix
+{
+    services.xserver.enable = true;
+}
+```

lenovo/ideacentre/k330/default.nix

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+{ config, lib, ... }:
+{
+    imports = [
+        ../../../common/cpu/intel
+        ../../../common/gpu/nvidia # Is it possible/advisable to pin this to the 390.xx driver family in case the user wants to use non-free drivers?
+        ../../../common/gpu/amd # The K330 could be bought with AMD GPUs but I don't have that configuration
+        ../../../common/pc
+    ];
+
+    # On my machine Wayland causes the desktop to freeze after a short time of operation
+    services.displayManager.sddm.wayland.enable = false;
+
+    # Should this be a conditional default in case plasma is activated?
+    # What if somebody installs both plasma AND another DE?
+    # The goal is to prefer x11 over wayland due to compatibility issues with the old hardware
+
+    
+    services.displayManager.defaultSession = lib.mkIf config.services.xserver.desktopManager.plasma6.enable (lib.mkDefault "plasmax11");
+}