Dell XPS 15 (9550) and Ubuntu Thread - Issues and Troubleshoot

I'd like to dedicate this thread for those with the Dell XPS 15 (9550) and Ubuntu OS, and list problems/issues and how to solve them.

For me, I have dual boot Windows 10 and Ubuntu 16.04 LTS. Appears everything works out of the box after installing Ubuntu 16.04 LTS, which is nice. However, some issues I face in Ubuntu:

• Bluetooth keeps turning ON after a restart, when you originally turned it off.
• Wifi changes to up-down arrow (LAN icon) after suspend, but Wifi works just fine.
• Headphones work out of the box, but if you plug it in, restart the computer, and try to hear somehing, it won't work. I would have to run 'alsamixer' and unmute the headphone and increase the volume to reset it.

If anyone have solutions to the above, please let me know. If anyone has issues with the laptop and Ubuntu, please share them in here as well.

Thanks!

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Dell XPS 15 (9550) and Ubuntu Thread - Issues and Troubleshoot