My nokia n900 always reboot

Hi Elie. As far as I know, this is a common problem. What you can actually do is voting for the appropriate bug in Bugzilla and trying to change your N900 with a new one using your warranty by Nokia.

Please see thread about starting it up in R&D mode, should correct the issue.

No, it's a hardware issue. R&D mode prevents the watchdog from resetting the device in case of emergency, and if you're lucky it will run fine, but R&D mode has many side effects like decreased battery life.

just got second reboot. Again, i was watching youtube video, downloading apps from app manager...

See the following open bugs

random HW watchdog reboots (/proc/bootreason contains "32wd_to")

and getbootstate bricks the device after 17 reboots if there are no normal boots in between them

I really don't understand why people are still happy to accept this as a software problem. It's sloppy QA, nothing more, nothing less. There are a bunch of devices out there which were, for whatever reason, not assembled to the usual Nokia standards. Those who were unfortunate enough to end up being supplied with one of them (myself included) put up with random reboots and other bizarre problems. After exchanging the troublesome device for a new one, no more reboots and problems. All the N900's being supplied at the moment have the same firmware revision loaded. If some reboot, while others do not, what else could it be but a hardware problem?

I can understand why Nokia might not want to make an official announcement confirming manufacturing problems with some of its products. But to then stand by while software engineers and customers spend valuable time testing possible work arounds in an attempt to identify an alleged software problem is reprehensible in my view. If this was a software issue, then all N900's would exhibit the same symptoms, since they all have the same firmware load.

IF YOUR N900 DOES NOT WORK PROPERLY THEN FFS GET IT REPLACED FOR ONE THAT DOES!!!!

It depends where you purchased it. Many places they have been out of stock for the last couple of weeks and more, and new ones will not come until mid.end January.

I know many similar situations. Of cource it is hardware, but it may have nothing to do with sloppy QA or sloppy specs. It may simply be natural spread in actual HW specs that is not accounted for in the (immature) drivers. The work around works excellent, no problems at all except your battery will last shorter when the N900 is lying on the table doing nothing.

So, for many. the least of two evils is to do the work around, at least untill we are more certain if this can be fixed in software (or not), and more sets are produced.

I think it has something to do with media player and browser combo. Every time I've had a reboot I've been playing music or had it paused and was browsing. I'm guessing corruption in mp3 file or some kind of resource conflict between the two because i also get stuttering on the track I'm playing sometimes when doing both.
Next time I get a stutter I'll look at the cpu/ram status bar icon and see if it shoots to the top.

My n800, like many others, would not power on after being shut down, e.g. to change battery. It had to be cooled in a fridge (freezer for some peope) before it could come back on. Would you expect this is hardware or software?
After denying the problem for a long time, Nokia released a software update that fixed it.