diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee03979..69c1cb6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,9 +5,10 @@ All notable changes, per version and per commit. Versions follow
 `steamify.sh`. Versions before 0.7.0 were numbered afterwards,
 one per merged pull request.
 
-## 2.7.0 - 2026-09-27
+## 2.7.0 - 2026-09-28
 
-- **feat: --defaults takes --skip <ids> and --boot gamescope|desktop, for the Steam Machine ISO's installer pages**
+- `4f6e6fd` **feat: --defaults takes --skip <ids> and --boot gamescope|desktop, for the Steam Machine ISO's installer pages**
+- **fix: HDMI-CEC enables cec-audio-control.socket (the TV remote's volume keys); existing installs get it as an update**
 
 ## 2.6.0 - 2026-09-27
 
diff --git a/TECHNICAL.md b/TECHNICAL.md
index b245b58..a14c6c1 100644
--- a/TECHNICAL.md
+++ b/TECHNICAL.md
@@ -180,7 +180,9 @@ SHA-256 in Valve's package index:
 - `cecd`, Valve's CEC daemon (a user service started with the desktop and
   gaming mode): TV remote keys become normal key presses (arrows, Enter,
   Back), and it turns the TV on and off with the PC;
-- `cec-audio-control`: volume of the TV or receiver;
+- `cec-audio-control`: volume of the TV or receiver (the TV remote's volume
+  keys); its user socket is enabled by Steamify, since SteamOS enables it
+  through a preset that pacman doesn't apply;
 - `inputattach-cec-units` (with `linuxconsole` from CachyOS for
   `inputattach`): attaches USB CEC adapters (Pulse-Eight, RainShadow).
 
diff --git a/lib/cec.sh b/lib/cec.sh
index a075e5d..4193628 100644
--- a/lib/cec.sh
+++ b/lib/cec.sh
@@ -155,6 +155,9 @@ cec_enable() {
     printf '%s\n' "# Written by Steamify: overrides STEAM_ENABLE_CEC=0 from the gaming mode script." \
         '[Service]' "EnvironmentFile=-$CEC_STEAM_ENV" | sudo tee "$CEC_STEAM_DROPIN" >/dev/null
     user_systemctl daemon-reload
+    # The TV remote's volume keys: SteamOS enables this socket through its
+    # preset, which pacman doesn't apply, so nothing else does on CachyOS.
+    user_systemctl enable --now cec-audio-control.socket 2>/dev/null
     cec_link_steamos_manager
     if compgen -G "/dev/cec*" >/dev/null; then
         user_systemctl restart cecd.service 2>/dev/null
diff --git a/lib/menu.sh b/lib/menu.sh
index f59ee2b..fac73ba 100644
--- a/lib/menu.sh
+++ b/lib/menu.sh
@@ -26,7 +26,7 @@ NO_PRESELECT=(boot cec kpin hdmi)
 FEATURE_BASELINE=2.1.0
 declare -A FEATURE_VERSION=(
     [gaming]=2.1.0 [boot]=2.1.0 [theme]=2.1.0 [glyphs]=2.1.0 [single]=2.1.0
-    [launcher]=2.1.0 [cec]=2.1.0 [machine]=2.2.0 [poweroff]=2.2.0 [vram]=2.3.0 [notify]=2.5.0 [steamgame]=2.5.1
+    [launcher]=2.1.0 [cec]=2.7.0 [machine]=2.2.0 [poweroff]=2.2.0 [vram]=2.3.0 [notify]=2.5.0 [steamgame]=2.5.1
     [kpin]=2.1.0 [hdmi]=2.1.0
 )