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‎content/bluetooth.md‎

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@@ -15,9 +15,70 @@ section: network-troubleshooting
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tableOfContents: true
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---
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## About Bluetooth
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### Basic Troubleshooting
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Bluetooth is incredibly flexible. With a range of factors that enhance compatibility, Bluetooth devices effortlessly connect and work together for a smooth, seamless experience.
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Bluetooth issues can be troubleshooted in several ways. The first thing to check is toggling airplane mode which will sometimes get Bluetooth functioning again. Next, make sure Bluetooth is enabled in the top bar, or in the <u>Bluetooth</u> system settings.
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Navigate to the upper-right corner of the screen and click on the Settings icon. A window will appear. In the Wi-Fi tab, you'll find the Airplane Mode toggle. Switch it on and off to enable and disable Airplane Mode.
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![navigate to settings tab](/images/bluetooth/bluetooth_10.png)
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![airplane mode toggle](/images/bluetooth/bluetooth_11.png)
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Turn on Bluetooth and confirm it is enabled in the top bar, or in the Bluetooth system settings.
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![bluetooth top bar](/images/bluetooth/bluetooth_13.png)
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![bluetooth system settings](/images/bluetooth/bluetooth_12.png)
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Using systemd:
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```bash
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sudo systemctl start bluetooth
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```
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```bash
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sudo systemctl enable bluetooth
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```
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Check the status of the bluetooth
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```bash
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sudo systemctl status bluetooth
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```
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Sample output:
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![bluetooth status systemd](/images/bluetooth/bluetooth_5.png)
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There is a program called <u>Bluetooth Manager</u>. It can sometimes pair and trust Bluetooth devices better than the default <u>Bluetooth</u> settings. Install it with:
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Install Bluetooth related software with this command:
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```bash
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sudo apt install blueman
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```
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> After reinstalling the above packages, fully shut down the machine and then power it back on, rather than rebooting. This ensures the hardware completely resets.
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Open Bluetooth Manager by pressing Super + Space and search:
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![bluetooth manager](/images/bluetooth/bluetooth_2.png)
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Remove the device, allowing for a fresh, new connection.
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![Remove device](/images/bluetooth/bluetooth_3.png)
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Click search and pair the device again:
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![Pair device](/images/bluetooth/bluetooth_4.png)
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If `tlp` is installed, then there may be settings interfering with Bluetooth functionality. Edit this file and disable Wifi and Bluetooth power saving features:
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```bash
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sudo nano /etc/tlp.conf
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```
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### Bluetooth version
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version
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```
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![bluetoothclt version](/images/bluetooth/bluetooth_1.png)
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![bluetoothctl version](/images/bluetooth/bluetooth_1.png)
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### Signal Interference
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Bluetooth uses the same bandwidth as the 2.4Ghz Wi-Fi band, and in most of our machines it is on the same chip as the Wi-Fi module. They usually have two antennae, one for Bluetooth, and one for Wi-Fi, but it is possible for other Wi-Fi or Bluetooth devices signals to cross and to cause connection issues. If users are in an area crowded with other Wi-Fi networks or devices, the interference from these outside sources can impact performance and range.
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Bluetooth uses the same bandwidth as the 2.4Ghz Wi-Fi band, and in some machines it is on the same chip as the Wi-Fi module. The Wi-Fi module usually has two antennae, one for Bluetooth, and one for Wi-Fi, but it is possible for other Wi-Fi or Bluetooth devices signals to cross and to cause connection issues. If users are in an area crowded with other Wi-Fi networks or devices, the interference from these outside sources can impact performance and range.
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### Device Specific Differences
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Similar to the kernel versions. Improvements are often made in newer versions of Ubuntu and Pop!\_OS. Running software updates is always a good idea, followed by a reboot.
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<!--## Bluez Versions-->
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### Configuration Issues
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Sometimes Bluetooth devices are working correctly, but something in settings needs to be reset.
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Bluetooth devices with microphones built in, can be used if the device supports HFP/HSP. However, without the technology that companies like Sony have patented, the solution is to divide up the audio stream so that some of it is used for audio out and some for audio in.
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This process lowers the sound quality of the stream when in HSP/HFP mode, so audio may be "tinny," compressed (lower-fidelity), or at a lower volume. That is expected behavior.
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## Bluetooth Troubleshooting
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Bluetooth issues can be troubleshooted in several ways. The first thing to check is toggling airplane mode which will sometimes get Bluetooth functioning again. Next, make sure Bluetooth is enabled in the top bar, or in the <u>Bluetooth</u> system settings.
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Installing Bluetooth related software with this command:
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```bash
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sudo apt install blueman
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```
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> After reinstalling the above packages, fully shut down the machine and then power it back on, rather than rebooting. This ensures the hardware completely resets.
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Open bluetooth manager, Super + Space and search:
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![bluetooth manager](/images/bluetooth/bluetooth_2.png)
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Remove the device, allowing for a fresh, new connection.
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![Remove device](/images/bluetooth/bluetooth_3.png)
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Click search and pair the device again:
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![Pair device](/images/bluetooth/bluetooth_4.png)
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If `tlp` is installed, then there may be settings interfering with Bluetooth functionality. Edit this file and disable Wifi and Bluetooth power saving features:
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```bash
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sudo nano /etc/tlp.conf
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```
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### Useful Programs
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There is a program called <u>Bluetooth Manager</u>. It can sometimes pair and trust Bluetooth devices better than the default <u>Bluetooth</u> settings. Install it with:
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```bash
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sudo apt install blueman
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```
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Start the bluetooth using systemctl:
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```bash
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sudo systemctl start bluetooth
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```
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```bash
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sudo systemctl enable bluetooth
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```
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Check the status of the bluetooth
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```bash
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sudo systemctl status bluetooth
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```
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Sample output:
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![bluetooth status systemd](/images/bluetooth/bluetooth_5.png)
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Then, run <u>Bluetooth Manager</u>. Check for the device being trusted, and also try re-pairing in that program.
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### Using bluetoothctl
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```
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bluetoothctl
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```
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![bluetoothclt](/images/bluetooth/bluetooth_6.png)
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![bluetoothctl](/images/bluetooth/bluetooth_6.png)
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If you have multiple Bluetooth controllers, choose the one you wish to connect to the device:
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sudo rm -r /var/lib/bluetooth/
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```
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## Additional Info
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Here are a few additional tidbits about the Bluetooth system that may help with troubleshooting.
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### Controlling audio
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Once you are connected to a Bluetooth speaker, you may need to change where your current audio is "routed". You can get a more advanced interface to settings on audio with the program called PulseAudio Volume Control. To install, run this command:

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