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+MDR-XB950
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+---
+title: Repairing GDM and Bluetooth Audio
+date: 2018-02-13
+image: resource:device-broken.png
+hide_header_image: true
+---
+
+Bluetooth audio is great! I've had a pair of Bluetooth headphones, [Sony MDR-XB950 BT](https://www.sony.com/electronics/headband-headphones/mdr-xb950bt), for around a year now, and the ability to listen to music without cables is amazing. But, I can only use the Bluetooth parts of this with my phone, because on Linux, it just sounds terrible. I've even gone so far as to buy and wire in a cable on my desk at work to enable me to fairly easily connect to my desk, without having to plug into the desktop every day.
+
+{{% resource src="device-broken.png" %}}
+`A2DP` marked as _unavailable_.
+{{% /resource %}}
+
+## The Problem
+The issue is caused by a lack of `A2DP`, a Bluetooth profile for transmitting stereo audio at high quality. According to the manual for my headphones, it supports `A2DP` just fine, however, my computer was reporting it didn't, and so was saying it was _unavailable_.
+
+After a large amount of searching, I came across a number of solutions, none of which worked. From trying some alternative software, to modifying config for `bluetoothd`, no change.
+
+## The Solution
+If there's 1 thing I know, it's that there's an [AUR](https://aur.archlinux.org/) package for just about everything. Surprisingly, there was even a package which fixed my issue entirely: [`pulseaudio-bluetooth-a2dp-gdm-fix`](https://aur.archlinux.org/packages/pulseaudio-bluetooth-a2dp-gdm-fix/).
+
+### Fixing
+1. `yaourt -S pulseaudio-bluetooth-a2dp-gdm-fix`
+2. Reboot
+
+That's it!
+
+{{% resource src="device-fixed.png" %}}
+`A2DP` is now enabled! _(Ignore the fact the device name changed)_
+{{% /resource %}}
+
+## The Cause
+According to the [related wiki](https://wiki.archlinux.org/index.php/Talk:Bluetooth_headset#GDMs_pulseaudio_instance_captures_bluetooth_headset), it's caused by `GDM` capturing the Bluetooth device, and unloading certain modules if they exist. I'm not exactly sure why it does this, but it's a fairly well documented issue.