[maemo-developers] Continuous reboot problem with the N770 hacker edition

From: Rainer Dorsch rdorsch at web.de
Date: Sat Apr 21 19:15:04 EEST 2007
Am Freitag, 20. April 2007 20:56 schrieben Sie:
> At Fri, 20 Apr 2007 18:26:42 +0200,
> Rainer Dorsch <rdorsch at web.de> wrote:
> > I used the N770 with the hacker edition of OS2007 heavily last week and
> > it broke:
> > The device is rebooting constantly, even putting it into RD mode did not
> > help getting rid of this. The sequence is
> > 1. blue boot progress bar
> > 2. Nokia hands and sound
> > 3. almost immidiately after the sound, a white stripe appears on the left
> > of the display. Looks like this is the Maemo menue bar. Then the screen
> > becomes white
> > 4. after approx. 19 seconds the device reboots and continues with 1.
> >
> > I interrupt the reboot cycles by removing the battery.
> I'm using Gergale and this happens to me about once every week or two.
> I had enough time after the device boots to run xterm and top.  The
> problem was jffs2_gcd_mtd4 was taking 100% of the CPU and a fair
> amount of memory.  This led me to suspect that the OOM killer was
> killing an essential task and thereby causing the watchdog timer to
> reset the device.  To prevent this, I simply disabled the watchdog
> time.  Now when this happens, jffs2_gcd_mtd4 burns CPU (and thus is
> unusable) but it is a few hours between resets.  After about day or
> two, the device is happy again.
> Neal

Thanks for the quick reply. I thought when I put the device into RD mode, the 
watchdog is not resetting the device at all (but I might be wrong). Is there 
a way to change the watchdog timer, when the device resets, before maemo is 
fully up?

I will flash the device on Monday evening, if nobody is interested in debug 


Rainer Dorsch
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D-72135 Dettenhausen
email: rdorsch at web.de
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