On Mon, Apr 19, 2010 at 9:02 AM, Claudio Miranda <claudio@xxxxxxxxxxxxxxx> wrote: > Hi, How to make the kernel recognizes 4 GB of RAM memory ? > > It is a Lenovo T400 Laptop. > Fedora 12 > 2.6.32.11-99.fc12.i686 #1 SMP Mon Apr 5 16:32:08 EDT 2010 i686 i686 > i386 GNU/Linux > > $ head -1 /proc/meminfo > MemTotal: 3057360 kB > > > dmesg shows > total RAM covered: 3998M > > The BIOS shows 4 GB of RAM memory > > Looks like the kernel initially recognizes the 4 GB, but is unable to > use it, is that right ? > > I read elsewhere that if there are more than 4 GB of RAM, the > kernel-pae is necessary, but my laptop doesn't have more than 4 GB. > > So, is it possible to have the kernel recognizes the 4 GB ? With or > without the kernel-pae ? > For a 32-bit machine you need the PAE kernel to utilize all 4GB's of your machine. If you have an 64-bit machine then the default x86-64 kernel will do this. I see you have F12 and i686 that should be a PAE enabled kernel. You should also see more memory than 3GB with a non PAE enabled kernel. Could you post the full output of dmesg? Thanks. Jon _______________________________________________ laptop mailing list laptop@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/laptop
