diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
new file mode 100644
index 00000000..7134f213
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,73 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ dev ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ dev ]
+  schedule:
+    - cron: '25 8 * * 4'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp', 'python' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Learn more about CodeQL language support at https://git.io/codeql-language-support
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    - run: |
+       mkdir build
+       cd build
+       cmake -DUNITTEST=1 ..
+       make
+       make test
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1
diff --git a/src/xmit.c b/src/xmit.c
index 6a725a7d..38001278 100644
--- a/src/xmit.c
+++ b/src/xmit.c
@@ -913,9 +913,19 @@ static void xmit_ax25_frames (int chan, int prio, packet_t pp, int max_bundle)
 
 	  /* Looks like a bug with the RPi audio system. Never an issue with Ubuntu.  */
 	  /* This runs over randomly sometimes. TODO:  investigate more fully sometime. */
+
 #ifndef __arm__
 	  text_color_set(DW_COLOR_ERROR);
 	  dw_printf ("Transmit timing error: PTT is on %d mSec too long.\n", -wait_more);
+
+	  /* This also happens with recent Linux distributions with PipeWire audio subsystem */
+	  /* where Wireplumber in its default setting turns off the audio output sink after */
+	  /* several seconds of inactivity, which results in slight delay while warming up again. */
+	  /* See: https://unix.stackexchange.com/questions/676846/how-do-i-disable-audio-sink-suspend-on-idle-using-wireplumber-in-fedora-35-so-th */
+#if USE_ALSA
+	  dw_printf ("If using PipeWIre, make sure your output sinks are not being suspended for inactivity.\n");
+#endif
+
 #endif
 	}