On Tue, 2004-08-31 at 10:53, Alan Cox wrote: > On Tue, Aug 31, 2004 at 10:42:14AM -0400, Ed Hill wrote: > > I guess it was just a coincidence that some of the kernels worked with > > mem=12G and others didn't. I've moved the machine to a new location and > > now *none* of the kernels I have (neither mine nor the Fedora ones) will > > boot with "mem=12G". The best I can get to work is "mem=3950M". > > If you don't specify mem= does it find all your RAM. ALso what chipset ? The chipset is an AMD-8131 and the board details are at: http://www.msicomputer.com/product/p_spec.asp?model=K8D_Master-F I did the following boot tests: 2.6.8-1.533 "mem=3950M" ==> OK 2.6.8-1.533 "mem=12G" ==> causes immediate re-boot early in the boot stage (too fast to read) 2.6.8-1.533 wo/ any "mem=" ==> same immediate re-boot problem And then I tried re-seated the RAM and now it won't POST. Rats! This is disappointing. Ed -- Edward H. Hill III, PhD office: MIT Dept. of EAPS; Rm 54-1424; 77 Massachusetts Ave. Cambridge, MA 02139-4307 emails: eh3@xxxxxxx ed@xxxxxxx URLs: http://web.mit.edu/eh3/ http://eh3.com/ phone: 617-253-0098 fax: 617-253-4464