4G Memory Only Recognised 3.4G

[David Vincent]

>> Recently, I have installed 4 x 1GB memory sticks with Ubuntu 7.10, but my
>> system only sees it as 3.4GB. Is this a typical phenomenon? Or, how can I
>> fix this problem?
>>
>> Many thanks,
>> Soo-Hyun

check your BIOS for a setting to enable PAE.  you may need to upgrade 
the bios on your motherboard.  do you dual-boot?  if so does your other 
OS see all the ram?

get into the grub menu, check if the memtest sees all 4gb.  does it?  if 
so your BIOS is good to go and you have an OS problem.  if not report 
back and we may be able to shed more light.

does your video card share RAM with your system?  sometimes they 
automatically take more when the BIOS detects you've installed more RAM. 
  check this in the BIOS.  btw what type of system are we talking about 
here?  laptop?  desktop?

i asked the oracle about your question, it coughed up this link:

https://answers.launchpad.net/ubuntu/+source/linux-meta/+question/13808

...among 283,000 others.  :)

http://www.google.ca/search?q=4gb+ram+ubuntu

-d