Update build.func

fixes https://github.com/tteck/Proxmox/issues/2894

misc/build.func

@@ -595,18 +595,20 @@ EOF
     fi
   else
     if [[ "$APP" == "Channels" || "$APP" == "Emby" || "$APP" == "Frigate" || "$APP" == "Jellyfin" || "$APP" == "Plex" || "$APP" == "Scrypted" || "$APP" == "Tdarr" || "$APP" == "Unmanic" ]]; then
-      if [[ -e "/dev/dri/card0" ]]; then
+      if [[ -e "/dev/dri/renderD128" ]]; then
+        if [[ -e "/dev/dri/card0" ]]; then
           cat <<EOF >>$LXC_CONFIG
 # VAAPI hardware transcoding
 dev0: /dev/dri/card0,gid=44
 dev1: /dev/dri/renderD128,gid=104
 EOF
-      else
+        else
           cat <<EOF >>$LXC_CONFIG
 # VAAPI hardware transcoding
 dev0: /dev/dri/card1,gid=44
 dev1: /dev/dri/renderD128,gid=104
 EOF
+        fi
       fi
     fi
   fi