From 40c81ea00382ac0ce962ef4a251dbf48fd915017 Mon Sep 17 00:00:00 2001
From: Fabio Scotto di Santolo <fscottodev@pm.me>
Date: Sun, 22 Mar 2026 12:11:53 +0100
Subject: [PATCH] Add NVIDIA hybrid graphics configuration for nymph (PRIME
 offload, GRUB params, power management, prime-run wrapper)

---
 .../roles/profile_desktop_i3/tasks/main.yml   | 55 +++++++++++++++++++
 dotfiles/nymph/.local/bin/prime-run           |  5 ++
 2 files changed, 60 insertions(+)
 create mode 100644 dotfiles/nymph/.local/bin/prime-run

diff --git a/ansible/roles/profile_desktop_i3/tasks/main.yml b/ansible/roles/profile_desktop_i3/tasks/main.yml
index bb76682..271a3ca 100644
--- a/ansible/roles/profile_desktop_i3/tasks/main.yml
+++ b/ansible/roles/profile_desktop_i3/tasks/main.yml
@@ -16,6 +16,53 @@
     - "{{ user_home }}/.config/Thunar"
     - "{{ user_home }}/.config/rofi"
 
+- name: Configure GRUB kernel parameters for NVIDIA hybrid graphics
+  tags: [packages, nvidia]
+  ansible.builtin.lineinfile:
+    path: /etc/default/grub
+    regexp: '^GRUB_CMDLINE_LINUX='
+    line: 'GRUB_CMDLINE_LINUX="rd.luks.uuid=1e15d159-5d05-4a1f-9639-ac200dff9f9c rootflags=subvol=@ apparmor=1 security=apparmor nouveau.modeset=0 nvidia-drm.modeset=1"'
+    state: present
+  when: ansible_facts['hostname'] == 'nymph'
+
+- name: Regenerate GRUB configuration
+  tags: [packages, nvidia]
+  ansible.builtin.command: grub-mkconfig -o /boot/grub/grub.cfg
+  changed_when: true
+  when: ansible_facts['hostname'] == 'nymph'
+
+- name: Configure NVIDIA power management for hybrid graphics
+  tags: [packages, nvidia]
+  ansible.builtin.copy:
+    dest: /etc/modprobe.d/nvidia-power-management.conf
+    content: |
+      options nvidia "NVreg_DynamicPowerManagement=0x02"
+    owner: root
+    group: root
+    mode: "0644"
+  when: ansible_facts['hostname'] == 'nymph'
+
+- name: Ensure user local bin directory exists
+  tags: [nvidia, dotfiles, dotfiles:host]
+  ansible.builtin.file:
+    path: "{{ user_home }}/.local/bin"
+    state: directory
+    owner: "{{ username }}"
+    group: "{{ user_group }}"
+    mode: "0755"
+  when: ansible_facts['hostname'] == 'nymph'
+
+- name: Install prime-run wrapper script for NVIDIA PRIME offload
+  tags: [nvidia, dotfiles, dotfiles:host]
+  ansible.builtin.copy:
+    src: "{{ playbook_dir }}/../dotfiles/nymph/.local/bin/prime-run"
+    dest: "{{ user_home }}/.local/bin/prime-run"
+    owner: "{{ username }}"
+    group: "{{ user_group }}"
+    mode: "0755"
+    force: false
+  when: ansible_facts['hostname'] == 'nymph'
+
 - name: Enable gnome-keyring PAM auth hook
   ansible.builtin.lineinfile:
     path: /etc/pam.d/login
@@ -49,6 +96,14 @@
   loop_control:
     label: "{{ item.dest }}"
 
+- name: Wrap alacritty with prime-run for NVIDIA PRIME offload
+  tags: [nvidia, dotfiles, dotfiles:desktop, dotfiles:host]
+  ansible.builtin.lineinfile:
+    path: "{{ user_home }}/.config/i3/config"
+    regexp: '^bindsym \$mod\+Return exec --no-startup-id /usr/bin/alacritty'
+    line: 'bindsym $mod+Return exec --no-startup-id ~/.local/bin/prime-run /usr/bin/alacritty'
+  when: ansible_facts['hostname'] == 'nymph'
+
 - name: Copy host-specific dotfiles
   tags: [dotfiles, dotfiles:desktop, dotfiles:host]
   ansible.builtin.copy:
diff --git a/dotfiles/nymph/.local/bin/prime-run b/dotfiles/nymph/.local/bin/prime-run
new file mode 100644
index 0000000..d88c22e
--- /dev/null
+++ b/dotfiles/nymph/.local/bin/prime-run
@@ -0,0 +1,5 @@
+#!/bin/sh
+# Wrapper to launch applications with NVIDIA PRIME offload
+export __NV_PRIME_RENDER_OFFLOAD=1
+export __GLX_VENDOR_LIBRARY_NAME=nvidia
+exec "$@"