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bbfa235
(Get the code!)
This bug affects me too. I posted about this on the ubuntu forums many months ago and got a "linux memory use is different from what you are used to" except that linux is really all I'm used to.
If I examine 'free', 'top', 'htop', system monitor, '/proc/meminfo', etc, they all say that I'm using about 2 GB (NOT including buffers or cache, with those it tops 3.3 GB). However, when I print 'ps aux' to a file and add up all the memory listed in there it only comes to 950 MB. So where has the rest gone?
I am running a fresh (within 24 hrs), up-to-date Karmic official release install and this really bums me out! I was hoping that the problem would vanish when I up graded to 9.10. I had the same issue in Jaunty.
I have attached the output of 'cat /proc/meminfo', 'free -t' and 'ps aux'. I imported the ps_aux data into OOCalc and added up all the process memory and it came to 25% or 993 MB. Free shows nearly 2 GB in use (3.3 GB with buffers).
Karmic 64 bit
Lenovo T400
4 GB RAM
ATI Discreet graphics with fglrx driver (note: when I had this problem in 9.04, I was using integrated intel graphics)