Not completing Boot - 20180502 - Null Pointer dereference

[Admin]

Hi Harry

I presume this is a Classic, when was this purchased ?

Could you try a test of rebooting with all dongles unplugged ?
remove GPS, WiFi, RTL-SDR

Keep the monitor plugged in, and please post a screenshot of the output

Thx
Lee

[HarryS]

'Morning,

I attached a screen photo on the first post but just to check I'm in the same place have re-booted this morning and attach the output here - its more or less the same issue give or take a line or two of activity - '[13.015067] Unable to handle kernel NULL pointer derefernce at virtual address 00000070'.  I gave also see the address noted as 00000071 and 000000072 from time to time.

This morning it first hung at 'started create volatile files and directories' - two lines before [13.015067]
Rebooted - hung on the next line 'Starting update UTMP about system Boot/shutdown' (did this twice) - I think this and the line above are pretty much one and the same?
Rebooted and got a screen of death but could read [12.804752] unable to handle kernel paging request at virtual address e10e0008
Rebooted - got [12.778828] Unable to handle kernel paging request at Virtual Address ffffffc4
Rebooted and ended back at Starting Update UTMP about system Boot/Shutdown.

Just as an FYI, I get no power warnings.  I'm using a 5v 2a power adapter and the unit has normally been run on a Anker Battery.

Given I have an old bridge (v1- an early BETA adopter!) I guess I am already on the backfoot given the progress on development, but even disconnecting that the unit hangs at 'Starting Update UTMP about system Boot/Shutdown so I dont think that process is even started and thius can discount any hardware error there?

H

[HarryS]

Hi Harry

I presume this is a Classic, when was this purchased ?

Could you try a test of rebooting with all dongles unplugged ?
remove GPS, WiFi, RTL-SDR

Keep the monitor plugged in, and please post a screenshot of the output

Thx
Lee

Hi Lee,

I bought the parts and built it myself, buying the V1 bridge.
Here you go - I have tried this already (and also unplugged the bridge).

Same error - [12.462227] Unable to handle kernel NULL pointer dereference at Virtual Address 0000000070

Is ist worth me trying to load an old version of PilotAware from say 2016 when I know it was running and see if it does anything different?

H

[Admin]

Is ist worth me trying to load an old version of PilotAware from say 2016 when I know it was running and see if it does anything different?

Sure give it a go.
So am I right in assuming this is a Pi1B+ ?
Thx
Lee

[HarryS]

Yes... P1 B+ 700MHZ, 512RAM 4 USB.

Do errr.. you have a copy of an earlier version you could send me?

[Admin]

Yes... P1 B+ 700MHZ, 512RAM 4 USB.
Do errr.. you have a copy of an earlier version you could send me?

What was the last version you were successfully running ?

Thx
Lee

[HarryS]

Not sure Lee - think it was from mid last year - certainly pre OGN and USB update.

H

[exfirepro]

'Morning,

I attached a screen photo on the first post but just to check I'm in the same place have re-booted this morning and attach the output here - its more or less the same issue give or take a line or two of activity -......

Harry,

My apologies - of course you did - my only ‘excuse’ is trying to deal with multiple threads, especially late at night. Still, it has moved things on a bit.

Lee,

IIRC 20170619 caused a bit of hassle, requiring 2 x ‘Hot Fixes’. I would think, probably best to try a full install of 20170223, which from my notes was the last ‘pre-UDP’ version and was pretty reliable.

Regards

Peter

[Admin]

Not sure Lee - think it was from mid last year - certainly pre OGN and USB update.

Sent you a PM

[exfirepro]

Lee / Harry,

A bit of a coincidence, but one of my mates from the airfield has been on the phone over the last hour or so - He had been trying to do a fresh 'Full Install' of 20180520 onto a PI2B+ for another mate - as advised by me yesterday after reported dropouts following an earlier USB (.pgp) update to the same version. He initially said that after a 'Full Overwrite' Format - using SDFv5, loading the Full Version of 20180520 onto the (8Gb) card and leaving the PAW unit powered up for over 2 hours, he was still seeing no WiFi Hotspot and the PAW was showing only the single solid red (Power) LED, though he had seen the Disc and Bridge LEDs flashing when the disc first started 'loading'.

I suggested he remove all dongles except the WiFi dongle, attach a monitor, then try a restart and let me know what happened. If this didn't work, he was planning to try a fresh install on another card, but only had a 2Gb card available.

He has just phoned back to say he tried the restart with the original 8Gb card, with the monitor, but it had hung very early into the process (I did explain to him what to expect) - so he removed the card, ran a 'Quick Format' on it using the Standard Windows 10 Formatter with the Default FAT32 allocation size, then re-copied the software onto the card, put it into the PilotAware and Bingo - It booted first time and seems to be running fine (so far at least).

Not sure if this helps, but it's certainly an interesting development.

Regards

Peter

[HarryS]

Lee, Peter - Thank you I (and no apologies needed Peter - I can see you have lots going on).  Lee - the PM doesn't have a file attached but points me to a PDF?

Anyhow, to discount the formatting issue, the Rosetta I ordered arrived at lunchtime (very quick - thank you).  I booted it up with the enclosed SD card and of course it worked perfectly. 

I then took the SD cards I've been working with on my 'classic' in this thread and popped them into the Rosetta.... and it booted up perfectly. 

Having seen Peter's response below, although I think I've probably tried that combination, I'll give it a go again!

H

[Paul_Sengupta]

Have the new loads been tried on a P1 B+, Lee? Maybe the new kernel software doesn't like them.

[HarryS]

Have the new loads been tried on a P1 B+, Lee? Maybe the new kernel software doesn't like them.

Possibly down to user error on my part -my bridge turns out to be a harkwoood barometer as I put my unit together in 2015.  Looking for a proper bridge to prove the theory....

[Admin]

Have the new loads been tried on a P1 B+, Lee? Maybe the new kernel software doesn't like them.

Hi Paul
Before release we test on

Pi1b+
Pi2b v1.1
Pi2b v1.2
Pi3b

Thx
Lee

[Moffrestorer]

When HarryS said it is a V1 “Bridge” I did wonder if he was referring to the Wireless Things ARF? It seems this is the case if it’s mounted on one of Jeremy Curtis’ Harkwood PCBs with Barometric Module.