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  1. Hi all. I wrote a small guide on enabling pps-gpio by modifying the device tree. With a PPS signal it's possible to setup your board as a Stratum 1 time server for your local network or the NTP pool. I used this method on a Rock64 but it should be applicable on most board. PPS-GPIO on Rock64 with Armbian legacy (4.4.X) kernel Cheers.
  2. EDIT: Just realized I posted this in the bug tracker forum. My apologies! See:
  3. That's fair. Perhaps the docs ( should be updated to indicate "mainline" is considered development and may be missing features.
  4. Can also confirm issues on my new Rock64. USB3 works on fresh install of Buster server 4.4 Linux rock64 4.4.198-rockchip64 #27 SMP Fri Dec 27 21:32:05 CET 2019 aarch64 GNU/Linux No USB3 device recognized on Buster server 5.4 Linux RockHole 5.4.6-rockchip64 #19.11.5 SMP PREEMPT Fri Dec 27 21:46:18 CET 2019 aarch64 GNU/Linux USB2 works OK on both. EDIT: Also no USB3 on Linux RockHole 5.3.11-rockchip64 #19.11.3 SMP PREEMPT Mon Nov 18 21:03:09 CET 2019 aarch64 GNU/Linux