Are there any diagnostics available for the 770?
If nothing general, how about a memory-testing program?

I bought 2 770s some time ago from woot, and one is rock solid, the other crashes regularly.

The stable one is running a totally stock OS with only a few games added.

The one that crashes regularly has done so while running OS2006 and both versions of OS2007HE, running on both the internal flash and on my Kensington 2GB MMC-Mobile card.
It doesn't seem to matter whether I use the stock kernel, the one with the high-speed MMC patch, or the one with the high-speed MMC patch and the block writes enabled. They all seem to crash with about the same regularity.
Unfortunately, it's not predictable except for the fact that it seems to happen while loading things (either web pages or programs), so I'm guessing it's either a bad portion of memory or it's flat out running out of memory. If it's the latter, I would expect that specific programs would die, not the entire OS! I've been using Linux heavily (on PCs mostly, but also on SPARCs and PowerPCs) since '92, and I've never had one crash so regularly (except for some really buggy NVidia drivers and a bad power supply once).
I've added a 128MB swap partition and added an RC script to enable it on bootup - seemed to help a little, but not much.

One time I found that every time I started Maemo Mapper it would crash, but I quickly figured out that it was a corrupted VFAT partition that was causing those crashes. I fscked it and those stopped, but the random crashes continue. I've fscked the ext3 filesystems on the card (while running from the flash) and it always comes up clean.

I have it set up to triple-boot right now... with the newest OS2007HE on the flash and on the 3rd MMCm partition, and the original OS2007HE on the 2nd partition (1t partition is VFAT, 4th is swap). Am planning to toss the latest OS2006 back on flash so I have all 3 OSes available.


Thanks for reading this far, and for any help you might be able to offer.

None?

Really?

Anyone want to write one?

Try memtester: http://pyropus.ca/software/memtester/

But be sure to run it without having active wifi connection (or even better, after rebooting and not touching wifi at all), otherwise you may encounter this bug: https://bugs.maemo.org/show_bug.cgi?id=2006

Cannot give you an easy answer, but memtest86+, as well as these two, have source code available. Someone might be able to compile them to run on the Nokia ITs...though two are designed to work w/o an OS.

http://www.mersenne.org/freesoft.htm
http://www.polybus.com/sys_basher_web/