diff --git a/BUILDING.md b/BUILDING.md
index ee64b088..70ef7b8a 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -1,5 +1,13 @@
 # Building and flashing
 
+NOTE: The development environment for Linux requires running external pre-compiled binaries linked against GLIBC. This means they will not run on Linux distros that use alternative libc (e.g. musl).
+
+0. For Linux, the following packages are needed to run the development env. Note that package names are from Debian, and may vary on other distros.
+
+- cmake
+- libusb-1.0
+- python3-venv
+
 1. Make sure you've got all of the submodules in this repo correctly initialised:
 
 ```
diff --git a/lua/settings.lua b/lua/settings.lua
index f2a1ec7e..9018d884 100644
--- a/lua/settings.lua
+++ b/lua/settings.lua
@@ -13,6 +13,7 @@ local usb = require("usb")
 local font = require("font")
 local main_menu = require("main_menu")
 local img = require("images")
+local nvs = require("nvs")
 
 local settings = {}
 
@@ -33,6 +34,9 @@ local SettingsScreen = widgets.MenuScreen:new {
       pad_left = 4,
       pad_right = 4,
     }
+  end,
+  on_hide = function(self)
+    nvs.write();
   end
 }
 
@@ -290,7 +294,7 @@ settings.DisplaySettings = SettingsScreen:new {
 
     local brightness = self.content:Slider {
       w = lvgl.PCT(100),
-      range = { min = 0, max = 100 },
+      range = { min = 20, max = 100 },
       value = display.brightness:get(),
     }
     brightness:onevent(lvgl.EVENT.VALUE_CHANGED, function()
diff --git a/luals-stubs/nvs.lua b/luals-stubs/nvs.lua
new file mode 100644
index 00000000..9e6eb8ee
--- /dev/null
+++ b/luals-stubs/nvs.lua
@@ -0,0 +1,9 @@
+--- @meta
+
+--- @class nvs
+local nvs = {}
+
+--- Saves current nvs
+function nvs.write() end
+
+return nvs
diff --git a/src/drivers/display.cpp b/src/drivers/display.cpp
index 7321f20b..15cd6c62 100644
--- a/src/drivers/display.cpp
+++ b/src/drivers/display.cpp
@@ -194,6 +194,10 @@ auto Display::SetDisplayOn(bool enabled) -> void {
 }
 
 auto Display::SetBrightness(uint_fast8_t percent) -> void {
+  // Set a lower limit of 7%, below this the backlight turns off.
+  // See https://codeberg.org/cool-tech-zone/tangara-fw/issues/158
+  if (percent < 7)
+    percent = 7;
   brightness_ =
       std::pow(static_cast<double>(percent) / 100.0, 2.8) * 1024.0 + 0.5;
   if (first_flush_finished_ && display_on_) {
diff --git a/src/tangara/audio/audio_fsm.cpp b/src/tangara/audio/audio_fsm.cpp
index 63b960e4..603584b7 100644
--- a/src/tangara/audio/audio_fsm.cpp
+++ b/src/tangara/audio/audio_fsm.cpp
@@ -270,6 +270,9 @@ void AudioState::react(const system_fsm::HasPhonesChanged& ev) {
     if (sServices->bluetooth().enabled()) {
       events::Audio().Dispatch(audio::OutputModeChanged{
           .set_to = drivers::NvsStorage::Output::kBluetooth});
+    } else {
+      // Nothing connected
+      transit<states::Standby>();
     }
   }
 }
diff --git a/src/tangara/database/tag_parser.cpp b/src/tangara/database/tag_parser.cpp
index a6a25555..15323a7c 100644
--- a/src/tangara/database/tag_parser.cpp
+++ b/src/tangara/database/tag_parser.cpp
@@ -171,9 +171,11 @@ OggTagParser::OggTagParser() {
   nameToTag_["ALBUM"] = Tag::kAlbum;
   nameToTag_["ARTIST"] = Tag::kArtist;
   nameToTag_["ALBUMARTIST"] = Tag::kAlbumArtist;
+  nameToTag_["TRACK"] = Tag::kTrack;
   nameToTag_["TRACKNUMBER"] = Tag::kTrack;
   nameToTag_["GENRE"] = Tag::kGenres;
   nameToTag_["DISC"] = Tag::kDisc;
+  nameToTag_["DISCNUMBER"] = Tag::kDisc;
 }
 
 auto OggTagParser::ReadAndParseTags(std::string_view p)
@@ -310,6 +312,23 @@ auto GenericTagParser::ReadAndParseTags(std::string_view p)
     -> std::shared_ptr<TrackTags> {
   std::string path{p};
   libtags::Aux aux;
+
+  // Fail fast if trying to parse a file that doesn't appear to be a supported audio format
+  // For context, see: https://codeberg.org/cool-tech-zone/tangara-fw/issues/149
+  bool found = false;
+  for (const auto& ext : supported_exts) {
+    // Case-insensitive file extension check
+    if (std::equal(ext.rbegin(), ext.rend(), path.rbegin(),
+                   [](char a, char b) { return std::tolower(a) == std::tolower(b); })) {
+      found=true;
+      break;
+    }
+  }
+  if (!found) {
+    ESP_LOGD(kTag, "skipping unsupported file: %s", path.c_str());
+    return {};
+  }
+
   auto out = TrackTags::create();
   aux.tags = out.get();
 
diff --git a/src/tangara/database/tag_parser.hpp b/src/tangara/database/tag_parser.hpp
index 642c4876..9130b306 100644
--- a/src/tangara/database/tag_parser.hpp
+++ b/src/tangara/database/tag_parser.hpp
@@ -55,6 +55,19 @@ class GenericTagParser : public ITagParser {
  public:
   auto ReadAndParseTags(std::string_view path)
       -> std::shared_ptr<TrackTags> override;
+
+ private:
+  // Supported file extensions for parsing tags, derived from the list of
+  // supported audio formats here:
+  // https://cooltech.zone/tangara/docs/music-library/
+  static constexpr std::string supported_exts[] = {
+    "flac",
+    "mp3",
+    "ogg",
+    "ogx",
+    "opus",
+    "wav"
+  };
 };
 
 }  // namespace database
diff --git a/src/tangara/dev_console/console.cpp b/src/tangara/dev_console/console.cpp
index bc3a7aca..d902c176 100644
--- a/src/tangara/dev_console/console.cpp
+++ b/src/tangara/dev_console/console.cpp
@@ -73,7 +73,8 @@ void RegisterLogLevel() {
       .command = "loglevel",
       .help =
           "Sets the log level to one of \"VERBOSE\", \"DEBUG\", \"INFO\", "
-          "\"WARN\", \"ERROR\", \"NONE\"",
+          "\"WARN\", \"ERROR\", \"NONE\". NOTE: Some log levels aren't available "
+          "on release builds.",
       .hint = "level",
       .func = &CmdLogLevel,
       .argtable = NULL};
diff --git a/src/tangara/lua/bridge.cpp b/src/tangara/lua/bridge.cpp
index 1c757a22..9521f265 100644
--- a/src/tangara/lua/bridge.cpp
+++ b/src/tangara/lua/bridge.cpp
@@ -25,6 +25,7 @@
 #include "lua/lua_database.hpp"
 #include "lua/lua_filesystem.hpp"
 #include "lua/lua_font.hpp"
+#include "lua/lua_nvs.hpp"
 #include "lua/lua_queue.hpp"
 #include "lua/lua_screen.hpp"
 #include "lua/lua_testing.hpp"
@@ -84,6 +85,7 @@ auto Bridge::installBaseModules(lua_State* L) -> void {
   RegisterVersionModule(L);
   RegisterThemeModule(L);
   RegisterScreenModule(L);
+  RegisterNvsModule(L);
 }
 
 auto Bridge::installLvgl(lua_State* L) -> void {
diff --git a/src/tangara/lua/lua_nvs.cpp b/src/tangara/lua/lua_nvs.cpp
new file mode 100644
index 00000000..e38e58d9
--- /dev/null
+++ b/src/tangara/lua/lua_nvs.cpp
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2024 Clayton Craft <clayton@craftyguy.net>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#include "lua/lua_version.hpp"
+
+#include "lua.hpp"
+#include "lua/bridge.hpp"
+
+#include "lua.h"
+#include "lua/lua_thread.hpp"
+
+namespace lua {
+
+[[maybe_unused]] static constexpr char kTag[] = "lua_nvs";
+
+static auto write(lua_State* L) -> int {
+  Bridge* instance = Bridge::Get(L);
+  instance->services().nvs().Write();
+
+  return 1;
+}
+
+static const struct luaL_Reg kNvsFuncs[] = {{"write", write},
+                                             {NULL, NULL}};
+
+static auto lua_nvs(lua_State* L) -> int {
+  luaL_newlib(L, kNvsFuncs);
+  return 1;
+}
+
+auto RegisterNvsModule(lua_State* L) -> void {
+  luaL_requiref(L, "nvs", lua_nvs, true);
+  lua_pop(L, 1);
+}
+
+}  // namespace lua
diff --git a/src/tangara/lua/lua_nvs.hpp b/src/tangara/lua/lua_nvs.hpp
new file mode 100644
index 00000000..1275fcc7
--- /dev/null
+++ b/src/tangara/lua/lua_nvs.hpp
@@ -0,0 +1,15 @@
+/*
+ * Copyright 2024 Clayton Craft <clayton@craftyguy.net>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include "lua.hpp"
+
+namespace lua {
+
+auto RegisterNvsModule(lua_State*) -> void;
+
+}  // namespace lua