Small and fast systerm.

mark.wilkinson at 2pmtech.com mark.wilkinson at 2pmtech.com
Tue Jan 18 22:40:01 CET 2005


Quoting ebiederman at lnxi.com:

> mark.wilkinson at 2pmtech.com writes:
>
>> Hi Bari,
>>
>> I have the plain old VIA EPIA (800/5000) working a good 80 % of the time.
>>
>> Not sure if my problems are buggy northbridge setup or buggy 
>> motherboard - it
>> generates some spurious serial at power on, and sometimes hangs reading the
>> smbus to size the ram.
>
> The spurious serial at power on. (Assuming it is just a character) 
> sounds like
> normal line noise.

Unfortunately not, it's more like a couple of dozen characters, which if the
reset button is pressed, come out as text from LB. I'm assuming that the
spurious characters are because the serial UART is not setup the first time
power is applied, but is still configured when the reset button get's pressed.

>
> As for smbus they seem to be the most common board problem I have seen.  Last
> time I trace one down it really was a board design defect, and made 
> using lmsensors
> on that board impossible.  In any event it is not terribly hard to put
> in timeouts and board resets to get past smbus problems.
>
> Although if you are having problems 20% of the time that is much more 
> often then I
> have seen problems on other boards.  Usually I see problems closer to 
> the 1% mark.
>
> Eric

The 20% is just an estimate, it could well be more or less than this. I could
have been miss lead as to the smbus as well, i'm basing this assumption on the
fact it always seems to hang when reading the SDRAM config registers for the
first memory bank.

Mark.

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