Frequent ubuntu "freezes" after RAM upgrade

[Steve]

On Sat, 26 Dec 2009 19:27:38 -0000, arshad <arshad3m at gmail.com> wrote:

> On Sat, 2009-12-26 at 20:20 +0100, Andrea Fortino wrote:
>> > On Sat, 2009-12-26 at 19:55 +0100, Andrea Fortino wrote:
>> >>  >> Hi,
>> >> <SNIP>
>> >>  >>
>> >>  >> BIOS can read all of 3 GB, but ubuntu often "freezes" after some  
>> minutes
>> >>  >> of work. So I try ubuntu memory test (option from GRUB menu).  
>> Test #5
>> >>  >> ("block move, 64 moves") reports numerous errors. Retried memory  
>> test,
>> >>  >> with only 2 GB (checked every possible combination of 3 blocks):  
>> no
>> >>  >> errors found.
>> >> <SNIP>
>> >>  >>
>> >>  >> Ciao,
>> >>  >> Andrea
>> >>  >>
>>
>>
>> accessys at smart.net ha scritto:
>> >>> have you tried removing one of the card s and seeing how it ran  
>> with 2gb
>> >>> rather than 3gb??
>> >>>
>> >>> Bob
>> >>>
>>
>> Andrea Fortino wrote:
>> >> Yes, thank you, now I'm running with 2x1GB, but I often use virtual
>> >> machines so 3 GB would be much better.
>> >>
>> >> I thought maybe something wrong with one of the 3 RAM slot of the
>> >> motherboard, but I checked all of them: they works. Problem should be
>> >> software, but I can't find where.
>> >>
>> >> Andrea
>> >>
>>
>> arshad ha scritto:
>> > is it something to do with 32bit and 64bit?
>> >
>>
>> I think 32 bit systems allow up to a total of 4 GB... hey, wait a
>> minute: may be I should _resize_ swap partition (1GB instead of 1,5GB)??
>> ..so total RAM would be 4GB (3GB RAM + 1 GB swap)!
>>
>> May be it could be the solution?
>>
>> Andrea
>>
>
> isn't the recommended swap size is 2*ramsize?
>
>
Who knows :-/
I’ve seen all manner of recommendations over the years, from complex  
formula to simple 'it has to be bigger then physical RAM if you want to  
use Suspend to RAM'.

-- 
Steve