On Tue, Jul 21, 2009 at 12:36:25PM +0100, tyler wrote: > James Brown <jbrownfirst@gmail.com> writes: > > > I have a laptop Acer TravelMate 3043WTMi under Lenny AMD64 with 4GD RAM. > > But the system "see" only 3GB: > > dmesg |grep Memory > > [ 0.004000] Memory: 3081184k/3136000k available (2225k kernel code, > > 54428k reserved, 1080k data, 392k init) > > $ cat /proc/meminfo > > MemTotal: 3088108 kB > > > > > > How can I get all my 4GB memory? > > I'm not sure how this works with AMD64, but with 32 bit systems the > default kernel has a maximum amount of RAM it can recognize and use. > When I increased the RAM on my thinkpad to 3GB, I had to switch to the > 686 kernel to get it all recognized. I'm not sure how to investigate, > but perhaps you need a different kernel or a kernel module? Just > guessing. > In my particular case, I have 4G of memory and they are all detected by the bios and by Memtest86+, because I'm using a 32bit Kernel, I compiled it with the CONFIG_HIGHMEM64G=y so that the system could map all 4G. IMHO, the problem here is hardware related, the chipset needs to reserve some space to address the pci slots, its an unfortunate but common limitation. > Tyler > > -- > Saint Mary's - they do science there! > > > -- > To UNSUBSCRIBE, email to debian-laptop-REQUEST@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org > -- ______________________________________________ José Santos | Debian Lenny/Sid mixed system jsantos@ubi.pt | 2.6.30.1-686 SMP PREEMPT
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