I use librem 15v3 with openSUSE Tumbleweed.
I just noticed that if I enable bluetooth and use it to play music, then my wifi download speed is greatly affected. To be sure I ran speedtest few times with bluetooth enabled and disabled. The results are consistent:
- with bluetooth disabled download speed is around 6Mbps
- with bluetooth enabled download speed is around 0.2Mbps
Surprisingly, upload speed stays around 1Mbps regardless of bluetooth.
I have kernel 4.19.8 and set options ath9k btcoex_enable=1