fix: NVIDIA fix handles Limine's += command line, underscore spelling; hardware test sets SCRIPT_DIR

CHANGELOG.md

@@ -13,6 +13,7 @@ one per merged pull request.
 - **test: tests/nvidia-hardware-test.sh for a real NVIDIA PC: check (read-only state of the detection, the live nvidia_drm modeset/fbdev, versions), apply, and visual (was the gaming mode picture clean), with a report file to paste**
 - **fix: the NVIDIA modules are loaded early only while every installed kernel has them, decided again at every kernel or driver change by a pacman hook (steamify-nvidia-initramfs): a later kernel without the modules (another kernel, a failed DKMS build, a downgrade) no longer makes its initramfs and Limine boot entry fail**
 - **feat: the NVIDIA fix is only for RTX 20 series or newer, decided like the VRAM booster does (vram_nvidia_legacy_id: chwd's legacy card lists); older cards are left alone**
+- **fix: the NVIDIA fix also edits Limine's `KERNEL_CMDLINE[default]+="..."` line (CachyOS writes that form; the fix found no line to edit and stopped) and counts `nvidia_drm.modeset=1` (underscore) as already set; tests/nvidia-hardware-test.sh sets `SCRIPT_DIR` (the hook script was read from `/patches`)**
 
 ## 2.9.6 - 2026-09-30
 

lib/nvidia.sh

@@ -50,9 +50,11 @@ nvidia_boot_file() {
 nvidia_param_set() {
     # 0 when $1 (e.g. nvidia-drm.modeset=1) is on the kernel command line or
     # already in the boot loader's file (not booted yet).
-    local f; f="$(nvidia_boot_file)"
+    # The kernel treats "nvidia_drm" and "nvidia-drm" alike: CachyOS' own
-    grep -qw -- "$1" /proc/cmdline 2>/dev/null ||
+    # setup may already have written the underscore spelling.
-        { [[ -n "$f" ]] && grep -qw -- "$1" "$f" 2>/dev/null; }
+    local f re; f="$(nvidia_boot_file)"; re="${1//nvidia-drm/nvidia[-_]drm}"
+    grep -qwE -- "$re" /proc/cmdline 2>/dev/null ||
+        { [[ -n "$f" ]] && grep -qwE -- "$re" "$f" 2>/dev/null; }
 }
 
 nvidia_params_missing() {
@@ -116,7 +118,7 @@ nvidia_enable() {
             backup_file "$f"
             case "$f" in
                 */limine)
-                    sudo sed -i -E "s/^(KERNEL_CMDLINE\[default\]=\"[^\"]*)\"/\1 $NVIDIA_PARAMS\"/" "$f" ;;
+                    sudo sed -i -E "s/^(KERNEL_CMDLINE\[default\]\+?=\"[^\"]*)\"/\1 $NVIDIA_PARAMS\"/" "$f" ;;
                 */sdboot-manage.conf)
                     sudo sed -i -E "s/^(LINUX_OPTIONS=\"[^\"]*)\"/\1 $NVIDIA_PARAMS\"/" "$f" ;;
                 */grub)

tests/nvidia-hardware-test.sh

@@ -6,6 +6,8 @@
 #   bash tests/nvidia-hardware-test.sh visual   after trying gaming mode: was the picture clean? (asks you)
 # Every run appends to ~/steamify-nvidia-report.txt: paste that file when asking for help.
 cd "$(dirname "$0")/.." || exit 1
+# patch_file (lib/common.sh) reads the hook script from $SCRIPT_DIR/patches.
+SCRIPT_DIR="$PWD"
 REPORT="${NVIDIA_REPORT:-$HOME/steamify-nvidia-report.txt}"
 source lib/common.sh; source lib/hdmi-refresh.sh; source lib/vram-booster.sh; source lib/nvidia.sh
 mode="${1:-check}"

tests/nvidia-test.sh

@@ -38,9 +38,11 @@ FAKE_DRIVER=0; check "skips when the driver isn't installed" '! nvidia_present'
 FAKE_DRIVER=1; NVIDIA_DRM_DIR="$T/none"; check "skips without an NVIDIA GPU" '! nvidia_present'
 NVIDIA_DRM_DIR="$T/drm"
 
-for loader in limine sdboot grub; do
+for loader in limine limineplus sdboot grub; do
     case $loader in
         limine) F="$T/limine"; printf 'KERNEL_CMDLINE[default]="quiet splash"\n' > "$F" ;;
+        # CachyOS writes its line as "+=" and may already have nvidia_drm.modeset=1 in it.
+        limineplus) F="$T/limine"; printf 'KERNEL_CMDLINE[default]+="quiet splash nvidia_drm.modeset=1"\n' > "$F" ;;
         sdboot) F="$T/sdboot-manage.conf"; printf 'LINUX_OPTIONS="quiet splash"\n' > "$F" ;;
         grub)   F="$T/grub";   printf 'GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"\n' > "$F" ;;
     esac