fix: Remove whatever is left of HDMI refresh boost, pin or no pin

AGENTS.md

@@ -222,8 +222,11 @@ gamescope and the Plasma desktop. Primary target: the Valve Steam Machine
   `steamify-fremont-poweroff` (`patches/steamify-fremont-poweroff.c`) clears
   it in a power-off-prepare handler, built for each kernel. It made the kernel pin
   unnecessary: `kpin` is only available while on (`kpin_available`), and
-  `detect_components` unticks it (and `hdmi`, which needs the pinned
-  kernel), so a normal run removes an existing pin. CachyOS's
+  `detect_components` unticks it, so a normal run removes an existing pin.
+  `hdmi` (it needed the pin) is retired the same way: `hdmi_status` is on
+  while anything of it is left (saved displays, hotplug unit, EDID files,
+  old kernel parameter), `hdmi_available` only then, it's always unticked,
+  and `hdmi_disable` removes all of it. CachyOS's
   `linux-cachyos` is clang-built, `-bore` GCC-built: let DKMS pick the
   compiler, never pass `LLVM=1`. Test shutdown on the real machine for every
   new major kernel.

CHANGELOG.md

@@ -19,8 +19,10 @@ one per merged pull request.
     rebooted.
   - The kernel pin is no longer offered. An existing pin is shown unticked,
     so the next run removes it and brings back CachyOS's current kernel;
-    HDMI refresh boost, which needs the pinned kernel, goes with it (newer
-    kernels do HDMI 2.1 themselves).
+    HDMI refresh boost, which needs the pinned kernel, is retired too
+    (newer kernels do HDMI 2.1 themselves): whatever is left of it (saved
+    displays, also ones not connected, its hotplug script, the old kernel
+    parameter) is unticked and removed by the next run, pin or no pin.
   - Feature versions: each component records the version of what it set
     up; when a release changes a component, installs with an older version
     are ticked and updated by a normal run ("update" in the plan and the

lib/hdmi-refresh.sh

@@ -56,18 +56,17 @@ hdmi_cmdline_param() {
 }
 
 hdmi_available() {
-    # Stays available while on, so it can be turned off after the pin is gone.
-    detect_valve_fremont || return 1
-    # Saved displays too, so they can be removed without the pin.
-    hdmi_status || [[ -n "$(hdmi_saved)" ]] || { pinned_kernel_installed && [[ -n "$(hdmi_connectors)" ]]; }
+    # No longer offered (it needed the pinned kernel): only shown while
+    # anything of it is left, so a normal run removes it.
+    detect_valve_fremont && hdmi_status
 }
 
 hdmi_status() {
-    # On = the connected display runs on its saved EDID. Another display on
-    # the port is off, so ticking it sets that one up. The command line: set
-    # up by an older version, re-applying moves it over.
-    [[ -n "$(hdmi_active_ids)" ]] ||
-        { [[ -n "$(hdmi_cmdline_param)" ]] && compgen -G "$HDMI_FW_DIR/steamify-*.bin" >/dev/null; }
+    # On while anything of it is left: saved displays (connected or not), the
+    # hotplug script, an EDID file, or the kernel parameter of versions
+    # before 2.1.0.
+    [[ -n "$(hdmi_saved)" || -f "$HDMI_UNIT" || -n "$(hdmi_cmdline_param)" ]] ||
+        compgen -G "$HDMI_FW_DIR/steamify-*.bin" >/dev/null
 }
 
 hdmi_saved() { [[ -f "$HDMI_MAP" ]] && grep -v '^#' "$HDMI_MAP"; }
@@ -688,16 +687,10 @@ hdmi_enable() {
 }
 
 hdmi_disable() {
-    # For the connected display; other saved displays stay (the app lists
-    # them). Without the pinned kernel none may stay: newer kernels read the
-    # EDID themselves.
-    local id
-    if [[ -n "$(hdmi_cmdline_param)" ]]; then
-        hdmi_forget all; hdmi_remove_boot_param || return 1; state_clear hdmi
-    elif [[ "${WANTED[kpin]:-1}" == 0 ]] || ! pinned_kernel_installed; then
+    # Everything, for every saved display: newer kernels read the whole EDID
+    # themselves, and an old one loaded at the next hotplug would be wrong.
     hdmi_forget all
-    else
-        for id in $(hdmi_active_ids); do hdmi_forget "$id"; done
-    fi
-    ok "HDMI refresh boost removed for the connected display; it uses its own EDID again."
+    hdmi_remove_boot_param || return 1
+    state_clear hdmi
+    ok "HDMI refresh boost removed; displays use their own EDID again."
 }

lib/menu.sh

@@ -108,9 +108,11 @@ detect_components() {
         component_available "$c" || continue
         { feature_outdated "$c" || feature_new "$c"; } && WANTED[$c]=1
     done
-    # The kernel pin is no longer needed (the power-off fix): drop it, and
-    # HDMI refresh boost, which needs it, on a normal run.
-    if component_available kpin; then WANTED[kpin]=0; WANTED[hdmi]=0; fi
+    # The kernel pin is no longer needed (the power-off fix), and HDMI
+    # refresh boost needed the pin: whatever is left of either is unticked,
+    # so a normal run removes it.
+    component_available kpin && WANTED[kpin]=0
+    component_available hdmi && WANTED[hdmi]=0
     # The terminal-only Steamify shortcut from before 2.0.1: tick it, so a
     # normal run replaces it with the app.
     launcher_repair && WANTED[launcher]=1