Hi Balbir, I had the same problem to resolve the 8GB mem issue, on poweredge 2800.
I had to recompile the kernel with highmem64 option enabled but after that system does not reboot. Can you please tell me if I am missing any steps: 1. Apt-get install kernel-source-2.4.27 fakeroot kernel-package libncurses5-dev 2. untar the source to /usr/src/ 3. copy the current config file 4. /usr/src/kernel-source-2.4.27/ 5. Make oldconfig 6. Make menuconfig 7. From the menu enable the highmem64 option 8. fakeroot make-kpkg clean 9. fakeroot make-kpkg --append-to-version=.06102006ver12 --initrd kernel_image 10. dpkg -i /usr/src/kernel-image-2.4.27.06102006ver12.deb 11. reboot Regards,
