velersoftware
Posts: 1
Joined: Sun Nov 29, 2015 6:27 pm

Bug at startup

Sun Nov 29, 2015 6:57 pm

Hi everybody,

I have a problem with my Raspberry Pi 2 and Windows 10 Iot Core.
Usually when I start my rasp, there is no problem. But since this morning, the green LED blink, and then nothing. Nothing appear on screen. But I can connect to Windows 10 with PowerShell and my local internet connection.

Something strange : if I do a "shutdown /r /t 0" with PowerShell, the raspberry pi restart, and this time I have finally something on screen, and everything looks normal.

I have a power supply 5V - 2A. The problem appear with or without anything on USB ports and GPIO. The problem appear also with the build 10240 and 10556. I also tried with two different SD car.
The problem doesn't appear with a Raspbian distribution.

Finally : this morning, at a moment, the green LED was blinking 7 times, and then 1 second of pause, and the 7 times again...etc. From the documentation of the raspberry, it's "kernal.img not found". Strange, as I didn't get that a second time.

Any idea?
Thank you in advance,
Regards,
Etienne

q3maniac
Posts: 13
Joined: Thu Oct 15, 2015 7:24 pm

Re: Bug at startup

Tue Jan 05, 2016 9:26 pm

I have the same (or similar) problem. Everything was working when suddenly the Raspberry Pi 2 (with Windows 10 iot) was starting to fail.

Problem: The Pi is booting up and I can detect that my WiFi-dongle (doesn't matter if I unplug this) is starting to work when suddenly it shutdowns and the green LED is blinking 7 times, and then 1 second of pause, and the 7 times again...etc.

I've reformat the SD-card and reinstalled the OS but the same problem occurs.

I'm also using a 5V - 2A power supply.

ricl
Posts: 657
Joined: Wed Aug 26, 2015 11:55 am

Re: Bug at startup

Tue Jan 05, 2016 10:40 pm

As the Linux guys would say, check your power supplies. Marketing is not engineering.
ricl : F/gamma = ma : Law ii(a) : https://climatedatablog.wordpress.com/2016/01/02/an-energy-challenge-2016/ #AnEnergyChallenge2016

q3maniac
Posts: 13
Joined: Thu Oct 15, 2015 7:24 pm

Re: Bug at startup

Sat Jan 16, 2016 11:02 am

I'm back with some information.
Bought a new power supply from a Swedish supplier (http://www.r-pi.se/) without any progress.

I then changed the SD-card with a new one and everything seems to be working again. It seems my old was corrupt (even tho I could explore the files in it without any faults. I even ran chkdsk on it without any errors. This gave me the false impression that the card was working).

Hope this helps anyone else :).

ricl
Posts: 657
Joined: Wed Aug 26, 2015 11:55 am

Re: Bug at startup

Sat Jan 16, 2016 11:32 am

Power should be the first thing you check on the Pi if things go wrong. Just like the Linux guys do.
ricl : F/gamma = ma : Law ii(a) : https://climatedatablog.wordpress.com/2016/01/02/an-energy-challenge-2016/ #AnEnergyChallenge2016

q3maniac
Posts: 13
Joined: Thu Oct 15, 2015 7:24 pm

Re: Bug at startup

Mon Jan 18, 2016 7:07 pm

Apparently I'm doing something wrong with my Pi because now I've the same problem with my new SD-card! :(.
All I did was using the 'Windows Device Portal' to change the startup app and then pressed 'Restart'. Now I've the 7 green led blink at startup again.

Can somebody please explain to me what the right procedure is for deploying new code, when working with a live device?.

ricl
Posts: 657
Joined: Wed Aug 26, 2015 11:55 am

Re: Bug at startup

Tue Jan 19, 2016 2:14 am

Can you select the default app as startup and does that work?
ricl : F/gamma = ma : Law ii(a) : https://climatedatablog.wordpress.com/2016/01/02/an-energy-challenge-2016/ #AnEnergyChallenge2016

q3maniac
Posts: 13
Joined: Thu Oct 15, 2015 7:24 pm

Re: Bug at startup

Tue Jan 19, 2016 8:30 am

I could before but now the Pi doesn't even startup correctly.
It gets stuck with green led flashes 7 times and is inaccessible :(.

EDIT: I have now reformatted the card again with SDFormatter (https://www.sdcard.org/downloads/formatter_4/) and I got it to work again!. I did try the "Windows Format" feature without any progress and since chkdsk did not find any bad clusters/sectors I assume that my SD-card is good.. I don't know anymore :o

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