skatebiker | # 1 | 2011-03-16, 08:38 | Report

After several tries on my N810 to fight the spontaneous reboots and tips of forum members that it is a battery problem, I finally found out this:

- The Turbo Diable kernel worsened the problem : it rebooted sometimes even at network access many times a day. So I reverted this and the reboots were less frequent.

- I tightened the battery with a piece of cardboard so that it tightly makes contact with the terminals.

- I disabled the watchdog timer with the flasher.

It still reboots 1-2 times a day even when it lies silent on the desk , no network connection or apps loaded. When it were a battery problem, a reboot could only occur at shake which may cause poor contact with the battery terminals. Even then it won't reboot but just turn off. Even a millisecond of power interruption lets it turn off. I had this issue with my Nokia 5800 phone with loose battery contacts and in all cases it turned off and did not reboot.

Does enyone have onther ideas ?

lma | # 2 | 2011-03-16, 09:16 | Report

The battery-related spontaneous reboot is really a bme bug (3144/6206). An easy way to tell if you are affected by that is if your device only reboots while charging.

http://wiki.maemo.org/Troubleshooting_boot_issues has some info that could help trace the problem. Syslog (from the tools repo - remove once you're done with it as it may fill up your root fs if left unattended) might also provide some hints.

skatebiker | # 3 | 2011-03-17, 08:48 | Report

Thanks for your reply.
My N810 reboots usually when it is &not* connected to the charger. I just added some small wrapped pieces of aluminum foil in the battery contacts to improve contact, thus to minimize poor contact which may cause reboots or even turnoffs.
I did the same thing with my Nokia 5800 phone which helped against spontaneously turning off (no reboots) a year ago.

alephito | # 4 | 2011-03-17, 21:57 | Report

The same used to happen to me with a Mugen battery.

A new and original Nokia battery solved my problems.