Raspberry Pi 2 reboots

[Juan Orti]

Hello,

I've recently installed Fedora in a Raspberry Pi 2 model B, but it
keeps rebooting a few minutes after boot.

This Pi was previously running with OSMC, based on Debian, without
problem. I've tried several SD cards and a couple of power supplies
with no success.

Some times, I see kernel crashes on the screen, but too fast to take a
photo, as the console is constantly printing text. Other times there is
no message, just a sudden reboot.

Anyone has experienced similar problems? How can I further debug the
issue?

Thanks.

[Torbjorn Jansson]

On 2019-01-12 14:34, Juan Orti wrote:
>  Hello,
>  
>  I've recently installed Fedora in a Raspberry Pi 2 model B, but it
>  keeps rebooting a few minutes after boot.
>  
>  This Pi was previously running with OSMC, based on Debian, without
>  problem. I've tried several SD cards and a couple of power supplies
>  with no success.
>  
>  Some times, I see kernel crashes on the screen, but too fast to take a
>  photo, as the console is constantly printing text. Other times there is
>  no message, just a sudden reboot.
>  
>  Anyone has experienced similar problems? How can I further debug the
>  issue?
>  
>  Thanks.
>   
how many amp do your power supply have?
do you have any usb devices or other things connected to it that draws a lot of 
power?

any lines in the system log or dmesg related to power?
some Pi models can detect a poor power supply and log it and when you have a 
gui up you also get a small icon on screen, i think it was a flash icon for 
insufficient power.
there is a forum post related to this with icons and description but i don't 
have the link right now.

journalctl -e --system perhaps can give you some clues whats going on.

[Juan Orti]

El sáb, 12-01-2019 a las 16:04 +0100, Torbjorn Jansson escribió:
>  how many amp do your power supply have?
>  do you have any usb devices or other things connected to it that
>  draws a lot of 
>  power?
>  
>  any lines in the system log or dmesg related to power?
>  some Pi models can detect a poor power supply and log it and when you
>  have a 
>  gui up you also get a small icon on screen, i think it was a flash
>  icon for 
>  insufficient power.
>  there is a forum post related to this with icons and description but
>  i don't 
>  have the link right now.
>  
>  journalctl -e --system perhaps can give you some clues whats going
>  on. 
The power supply is fine. I've used one of 2A and other of 3A, and I
don't see the under voltage icon. I've been using this Pi for 3 years
with this same power supply.

It has only connected the ethernet and hdmi cables, no USB.

I've checked the journal, but nothing is written in the moment of the
crash.

Is it possible to use kdump in the Pi? How can I modify the kernel
command line to add the crashkernel parameter?

Thanks.

[Peter Robinson]

>  > I've recently installed Fedora in a Raspberry Pi 2 model B,
> but it
>  > keeps rebooting a few minutes after boot.
>  >
>  > This Pi was previously running with OSMC, based on Debian, without
>  > problem. I've tried several SD cards and a couple of power supplies
>  > with no success.
>  >
>  > Some times, I see kernel crashes on the screen, but too fast to take a
>  > photo, as the console is constantly printing text. Other times there is
>  > no message, just a sudden reboot.
>  >
>  > Anyone has experienced similar problems? How can I further debug the
>  > issue? 
These sorts of issues are generally due to power supply. Make sure you
have one rated as documented by the RPi foundation:
https://www.raspberrypi.org/documentation/faqs/#pi-power

Basically you'll want one capable of 2 Amps

> how many amp do your power supply have?
> do you have any usb devices or other things connected to it that draws a lot of
> power?
>
> any lines in the system log or dmesg related to power?
> some Pi models can detect a poor power supply and log it and when you have a
> gui up you also get a small icon on screen, i think it was a flash icon for
> insufficient power.
> there is a forum post related to this with icons and description but i don't
> have the link right now.
>
> journalctl -e --system perhaps can give you some clues whats going on.
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[Juan Orti]

El lun, 14-01-2019 a las 05:23 +0000, Peter Robinson escribió:
>  > > I've recently installed Fedora in a Raspberry Pi 2
> model B, but
>  > > it
>  > > keeps rebooting a few minutes after boot.
>  > > 
>  > > This Pi was previously running with OSMC, based on Debian,
>  > > without
>  > > problem. I've tried several SD cards and a couple of power
>  > > supplies
>  > > with no success.
>  > > 
>  > > Some times, I see kernel crashes on the screen, but too fast to
>  > > take a
>  > > photo, as the console is constantly printing text. Other times
>  > > there is
>  > > no message, just a sudden reboot.
>  > > 
>  > > Anyone has experienced similar problems? How can I further debug
>  > > the
>  > > issue?
>  
>  These sorts of issues are generally due to power supply. Make sure
>  you
>  have one rated as documented by the RPi foundation:
>  https://www.raspberrypi.org/documentation/faqs/#pi-power
>  
>  
>  Basically you'll want one capable of 2 Amps
>  
>  > how many amp do your power supply have?
>  > do you have any usb devices or other things connected to it that
>  > draws a lot of
>  > power?
>  > 
>  > any lines in the system log or dmesg related to power?
>  > some Pi models can detect a poor power supply and log it and when
>  > you have a
>  > gui up you also get a small icon on screen, i think it was a flash
>  > icon for
>  > insufficient power.
>  > there is a forum post related to this with icons and description
>  > but i don't
>  > have the link right now.
>  > 
>  > journalctl -e --system perhaps can give you some clues whats going
>  > on. 

I think I've found the problem.

I configure my servers with an Ansible playbook, and I've remembered
that it sets the directive RuntimeWatchdogSec=10min in
/etc/systemd/system.conf.

I've reinstalled without that setting and now it has an uptime of 4
days. Looks good!

Thanks,
Juan Orti.