fix: on NVIDIA the SteamOS conversion is a choice, Gaming on NVIDIA stays preselected; supported cards are GTX 16 / RTX 20 and newer

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KkpbsMw4rQyBsxDG6ebHK2

lib/gamescope-nvidia.sh

@@ -4,7 +4,8 @@
 # https://github.com/theupriser/steamify-gamescope-nvidia; the package `steamify-gamescope-nvidia` is built here, on the PC,
 # and replaces `gamescope` (it provides it). The patch is opt-in: gamescope reads `gamescope_drm_gbm_scanout=1` from its
 # environment, which is set for the gaming session (gamescope-session's environment file, and environment.d).
-# Used by the SteamOS conversion (`gaming_enable`/`gaming_disable`) on a supported NVIDIA card (`nvidia_supported`).
+# Used by the SteamOS conversion (`gaming_enable`/`gaming_disable`) on a supported NVIDIA card (`nvidia_supported`):
+# GTX 16 / RTX 20 series or newer (Turing and later, what NVIDIA's open kernel driver supports).
 # Sourced by steamify.sh; not meant to be run on its own.
 
 GSN_PKG=steamify-gamescope-nvidia

lib/menu.sh

@@ -206,6 +206,8 @@ detect_components() {
             component_available "$c" && component_selectable "$c" && ! is_action "$c" &&
                 [[ " ${NO_PRESELECT[*]} " != *" $c "* ]] && WANTED[$c]=1
         done
+        # On NVIDIA "Gaming on NVIDIA" is the default; the conversion (a patched gamescope, built here) is a choice.
+        nvidia_present && WANTED[gaming]=0 WANTED[glyphs]=0
         machine_available && WANTED[cec]=1
     fi
 }
@@ -284,6 +286,8 @@ defaults_list() {
         sel=false; component_selectable "$c" && sel=true
         on=false
         [[ "$sel" == true && " ${NO_PRESELECT[*]} " != *" $c "* ]] && on=true
+        # (On NVIDIA the conversion is a choice: "Gaming on NVIDIA" is preselected, see show_menu's first run.)
+        [[ "$c" == gaming || "$c" == glyphs ]] && nvidia_present && on=false
         [[ "$c" == cec ]] && machine_available && on=true
         items+="${items:+,}{\"id\":$(json_str "$c"),\"label\":$(json_str "${LABEL[$c]%%:*}")"
         items+=",\"hint\":$(json_str "$( [[ "${LABEL[$c]}" == *:* ]] && echo "${LABEL[$c]#*: }")")"

lib/nvidia.sh

@@ -125,7 +125,7 @@ nvsilent_disable() {
 
 nvidia_supported() {
     # A supported NVIDIA GPU: PCI vendor 0x10de, display class, its kernel
-    # driver installed, and not older than the RTX 20 series, decided like the
+    # driver installed, and not older than Turing (GTX 16 / RTX 20 series: the cards NVIDIA's open kernel driver supports), decided like the
     # VRAM booster does (vram_nvidia_legacy_id: chwd's legacy card lists, every
     # other card runs NVIDIA's open modules). Older cards are left alone.
     local d