I'm having exactly the same problem in Gentoo amd64.
Actually I'm using mem=4000M, the laptop is not rebooting and 'free' reports:
ti...@alice ~ $ free -m
total used free sharedbuffers cached
Mem: 3011677 2333 0 9
** Also affects: gentoo
Importance: Undecided
Status: New
--
64-bit Intrepid automatic permanent reboot loop related to having exactly 4GB
of memory
https://bugs.launchpad.net/bugs/272530
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My laptop with this problem is a Compal JFT00 (bios version 1.05A).
At the moment it started having other problems, maybe related to this
one (e.g., rebooting also when compiling a lot of things and ACPI
thermal_zone temperature is oscillating quickly and too much between 42,
55,
I have a new information:
This problem in my laptop is caused by a motherboard incompatibility with the
processor. I believe a BIOS update could fix it, but a guy with the same laptop
guaranteed me that other processor can fix it too.
My processor is a Intel Core 2 Duo T5750 (Merom) and some wor
