Upgraded from 44048 without issues via GUI - did an "erase nvram" from the CLI and reconfigured both devices manually.
Issues: Wifi is still unreliable for me. With 5ghz 80-wide channels, performance is great and stable for a while but then wifi connections go into a zombie state for iphones and macbooks (maybe others as well). Recycling the wifi on the client fixes it right away but it doesn't last long.
My working theory is that it is related to roaming between APs. This would explain why it affects iphones and laptops as they are carried around the house. I left my primary 3200ACM at 44483 and fell back to 44048 on the 1900ACSv1.
Wireguard client: Using Mullvad client config following parts of Hellakenut's "idiots guide for commercial clients" and egc's updated guide to eliminate the startup script.
3200ACM: Linux 4.9.237 #2128 SMP Fri Oct 2 00:43:25 +03 2020 armv7l
1900ACS: Linux 4.9.231 #1979 SMP Sun Aug 2 03:35:09 +03 2020 armv7l
Router/Version: Linksys WRT1900ACSv2
File: ddwrt-linksys-wrt1900acsv2-webflash.bin (no nvram erase)
Kernel: Linux 4.9.237 #2128 SMP Fri Oct 2 00:43:25 +03 2020 armv7l
Mode: AP, NAS, OpenVPN Server
Temperatures: CPU 63.2 °C / WL0 37.3 °C / WL1 38.8 °C
Status: mostly working
Upgraded from r43306 std (05/31/2020)
Internet speed: 2.3 Mb/s (expect 200 Mb/s)
LAN speed: 967 Mb/s (previous was 883 Mb/s, new record!)
WiFi speed (2.4 Ghz): 26 Mb/s (previous was 70 Mb/s, record is 141)
WiFi speed (5 Ghz): 65 Mb/s (previous 113 Mb/s, record is 142)
- printer (2.4GHz) - ping from LAN is 88ms, 0% packet loss (uptime 10 minutes)
- printer (2.4GHz) - ping from LAN is 6ms, 0% packet loss (uptime 27 minutes)
- iPad (2.4 Ghz) - working
- Android phone (2.4/5Ghz) - working
- Macbook (5GHz) - working
- Chromecast (5GHz) - working
OpenVPN server is working
NAS not working because USB thumbdrive not recognized
I did disable and re-enable USB storage, but that did not seem to help.
EDIT: The USB thumbdrive was not connected. Now that it is connected, it is mounted as expected. However, samba is not working.
EDIT 2 (2020-Oct-31): Lots of dropped connections with Wifi, trying 44048