Hallo, I am using 2.4.18 Kernel on a 512MB RAM Mashine. Kernel detects only 256 MB. If I am booting lilo with mem=512M the kernel Ooopses and panics. The kernel is patched with kernel patch of kernel.org from februar 18 th. Your documentation told me that memory assigment problems should have gone with 2.4 kernels. So I think maybe it is really a problem. Best Regards Matthias