Lee, Peter, thanks for the fast replies. I should at this point admit to working in IT so fairly handy around networking issues. Status update as of this morning:
1. A big ah ha was that yesterday I was doing all of this in an enclosed room with no GPS source and I noticed an erroneous date & time in the Home Screen - I wondered if this could be an issue? I re-sited the PAW into an open area with at least 3 satellites in range. This is an official unit supplied assembled
2. Re-tested my RJ45 (internet) connection on a laptop to just make sure it was working (occasionally a router or switch may need restarting)
3. Completed steps 1 to 3 (as described by Lee) and by using a LAN analyser tool discovered an IP address of 192.168.1.133
4. Quick ping test to make sure all was looking good:
--- 192.168.1.133 ping statistics ---
18 packets transmitted, 18 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 1.115/3.590/5.186/0.906 ms
test:~ dbuchana$
5. Web browser connected to 192.168.1.133 & checked home screen:
PLATFORM Model B Pi 2
ETH0-IP addr:192.168.1.133
DATE Sun Jun 12 10:07:15 2016
UPTIME 10:07:15 up 0 days 00:12, Load 0.68:0.41:0.23
NAVIGATION Connected 0 Devices
It's indoors so showing 3 satellites and a bunch of ADS-B traffic (I live fairly close to Heathrow!).
6. Do a check for updates - few seconds pause and then flashes an error in the browser which quickly disappears:
/root/servers/check.sh: Error
7. Similar errors as before in the log (I've attached a complete log from unit start). It appears shortly after config complete to run an Update Track routine that for whatever reason can't find an Update, example:
(09:56:01) SYS-MON : Update Track(09:57:01) SYS-MON : Update Trackls: cannot access /root/cache/Updates: No such file or directory
8. I re-tried the Check for Updates and you can see corresponding log errors for /root/cache/Updates
9. Left PAW on the internet for a further 40-minutes (needed to get a shower!). At 10:10 you now notice at the Update Track various mount commands (did it now discover the http server for the updates?). At 10:49 tried a Check for Update - same error as 7 above. It is still doing RW and RO mounts in the log
10. Powered off / disconnected RJ45 / powered on / connected tablet to PAW Wifi / tried Updates but as before it will just pause for a long time and give the same ls: cannot access /root/cache/Updates: No such file or directory
My only conclusion is that when connected to the RJ45 its struggling to open a socket to an http/https server somewhere and mount the update. Any chance this could be caused by the update server itself (it's down or not working) or perhaps router / firewall settings? That said I'm using a Virgin Media Hub / Cisco Router and its got fairly standard settings on it to my knowledge.
A curious problem anyway and happy to help try out some further test(s). I could hook up a monitor and keyboard and dust off my Linux skills