kali.md: fix Qubes PulseAudio

docs/os/pentesting/kali.md

@@ -50,7 +50,7 @@ access can change this configuration in firewall settings for the TemplateVM.
 
 ```shell_session
 $ gpg --keyserver hkps://keys.gnupg.net --recv-key 44C6513A8E4FB3D30875F758ED444FF07D8D0BF6
-$ gpg --list-keys --with-fingerprint 44C6513A8E4FB3D30875F758ED444FF07D8D0BF6 
+$ gpg --list-keys --with-fingerprint 44C6513A8E4FB3D30875F758ED444FF07D8D0BF6
 $ gpg --export --armor 44C6513A8E4FB3D30875F758ED444FF07D8D0BF6 > kali-key.asc
 ```
 
@@ -128,7 +128,7 @@ the Kali repository, the Qubes testing repository and the Debian testing
 repository.
 So this step [step 8] is currently needed. But it will not always be the case.
 
-9. Update the template 
+9. Update the template
 
 **Note:** During execution of the update, carefully read list of packages to be removed. If it contains `qubes-vm-dependencies` package, terminate operation and try to resolve missing dependencies first. For other `qubes-*` packages, it is up to you to decide if you need them.
 
@@ -144,12 +144,36 @@ At this point you should have a working template and you can install the tools y
 You can find [a list of Kali Linux `Metapackages` here](https://tools.kali.org/kali-metapackages)
 Keep in mind that the tools you will install can easily take more than 10 GB, [so you will need to **grow** the size of the VM system storage.][qubes-resize-disk-image]
 
+Fix Qubes PulseAudio (audio and microphone)
+---------------------------------------------
+Installing the `kali-defaults` package (which is included in many Kali metapackages including `kali-linux-core`) causes Kali PulseAudio configurations files to be installed that interfere with what Qubes provides. This breaks audio and microphone throughput for that qube.
+
+To fix this, simply do one of the following in the Kali Linux TemplateVM:
+
+### Remove just the conflicting PulseAudio configuration files
+
+1.  Remove the configuration files by running the following command:
+
+```shell_session
+# rm /usr/lib/systemd/user/pulseaudio.service.d/kali_pulseaudio.conf /usr/lib/systemd/user/pulseaudio.socket.d/kali_pulseaudio.socket.conf
+```
+
+### Uninstall the entire `kali-defaults` package
+
+1. Assess the function and contents of the package to see if you need it:
+    - See description: `apt show kali-defaults`
+    - See installed files: `dpkg -L kali-defaults`
+2. If you determine that the package is unnecessary, then uninstall it
+    - `sudo apt remove kali-defaults`
+
+Finally, for both of these options, the Kali Linux qube will have to be restarted for these changes to take effect.
+
 Alternative Options to Kali Linux
 ===================================
 * [PenTester Framework][PTF], with [PTF Qubes OS guide][qubes-ptf]
 * BlackArch Linux, with [BA Qubes OS guide][qubes-blackarch]
 * more on the [Penetration Testing page][qubes-pentesting]
- 
+
 
 Notes
 =============