Kernel doesn't recognize complete memory

[Frank Fiene]

Lenovo Z61p, Intel Core2 Duo T7200

I have 4GB RAM installed and BIOS recognize 4GB RAM.
Linux kernel (Ubuntu-7.04, 32bit-PAE and 64bit, openSUSE-10.2 32bit-PAE 
and 64bit) tells me: only 3GB of RAM are installed.

Any other user with a 4GB Thinkpad? tytso?

What can i do? Please help!

Regards
Frank
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