feat: NVIDIA modules in the initramfs only while every kernel has them, decided again by a pacman hook at every kernel change

patches/README.md

@@ -14,4 +14,5 @@ read and reviewed on their own. `lib/*.sh` reads them with `patch_file
 | `steam-shortcuts.py` | `lib/steam-game.sh` (Add as non-Steam game) | Reads and writes Steam's binary `shortcuts.vdf` (find, add or update, remove) |
 | `steamify-notifier.py` | `lib/update-notifier.sh` (Update notifications) | The daily check: notification and tray icon when there's a new release |
 | `steamify-os-release.sh`, `steamify-os-release.hook` | `lib/login-manager.sh` (SteamOS conversion) | What Steam's System settings show besides the OS name (which stays CachyOS's): `VERSION_ID=steamos-X.Y`, `VERSION_CODENAME=steam-machine`, `VARIANT`/`VARIANT_ID` Steamify with its version, in `/etc/os-release`; the pacman hook runs it again after cachyos-hooks (`fill SCRIPT=... VERSION=... STEAMOS=...`) |
+| `steamify-nvidia-initramfs.sh`, `steamify-nvidia-initramfs.hook` | `lib/nvidia.sh` (SteamOS conversion, NVIDIA fix) | The pacman hook (before the initramfs is built, after DKMS) and its script: the NVIDIA modules go into the initramfs only while every installed kernel has them, decided again at every kernel or driver change (`fill SCRIPT=...`) |
 | `cros-ec-cec-single-port.patch` | `lib/cec.sh` (HDMI-CEC) | Makes Valve's Steam Machine CEC driver find amdgpu's HDMI port |

patches/steamify-nvidia-initramfs.hook

@@ -0,0 +1,17 @@
+# Installed by Steamify CachyOS (SteamOS conversion, NVIDIA fix): decides
+# again whether the NVIDIA modules go into the initramfs, after DKMS has built
+# its modules (71-dkms-install) and before the initramfs is built
+# (90-mkinitcpio-install); hooks run in file name order.
+[Trigger]
+Operation = Install
+Operation = Upgrade
+Operation = Remove
+Type = Path
+Target = usr/lib/modules/*/vmlinuz
+Target = usr/lib/modules/*/extramodules/nvidia*
+Target = usr/lib/modules/*/updates/*
+
+[Action]
+Description = Steamify: NVIDIA modules in the initramfs only if every kernel has them
+When = PostTransaction
+Exec = @SCRIPT@ sync

patches/steamify-nvidia-initramfs.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+# Installed by Steamify CachyOS (SteamOS conversion, NVIDIA fix), run by the
+# pacman hook steamify-nvidia-initramfs.hook before the initramfs is built.
+# The NVIDIA modules go into the initramfs (early KMS) only while EVERY
+# installed kernel has them: mkinitcpio fails on a module a kernel lacks, and
+# limine-mkinitcpio then skips that kernel's boot entry, kernel parameters
+# included. Decided again at every kernel or driver change, so a new kernel
+# without the modules (another kernel, a failed DKMS build, a downgrade) gets
+# a working initramfs and the file comes back once it has them.
+#   steamify-nvidia-initramfs [sync|check]
+#   sync   (default) write or remove the drop-in to match
+#   check  exit status 0 when every installed kernel has nvidia_drm
+conf="${NVIDIA_INITRAMFS_CONF:-/etc/mkinitcpio.conf.d/90-steamify-nvidia.conf}"
+mods="${NVIDIA_MODULES_DIR:-/usr/lib/modules}"
+
+everywhere() {
+    local k found=0
+    for k in "$mods"/*/; do
+        [[ -f "$k/vmlinuz" || -f "$k/pkgbase" ]] || continue   # an installed kernel, not a leftover folder
+        find "$k" -name 'nvidia-drm.ko*' -print -quit 2>/dev/null | grep -q . || return 1
+        found=1
+    done
+    [[ $found == 1 ]]
+}
+
+case "${1:-sync}" in
+    check) everywhere ;;
+    sync)
+        if everywhere; then
+            [[ -f "$conf" ]] || { mkdir -p "$(dirname "$conf")" &&
+                echo 'MODULES+=(nvidia nvidia_modeset nvidia_uvm nvidia_drm)' > "$conf"; }
+        else
+            rm -f "$conf"
+        fi ;;
+    *) echo "usage: $0 [sync|check]" >&2; exit 2 ;;
+esac