From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesper Dangaard Brouer Subject: (Solved) Problem compile kernel on Ubuntu and using on Debian Date: Tue, 13 Oct 2009 13:01:17 +0200 Message-ID: <1255431677.13607.118.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: "netdev@vger.kernel.org" , Sam Ravnborg To: Linux Kernel Mailing List Return-path: Received: from lanfw001a.cxnet.dk ([87.72.215.196]:32850 "EHLO lanfw001a.cxnet.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750736AbZJMLBy (ORCPT ); Tue, 13 Oct 2009 07:01:54 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Hi Google, I had a problem compile kernel 2.6.31.3 on an Ubuntu 9.04 server (CPU core i7) and using it on a Debian 5.0.3 lenny (CPU Atom 330). Both systems using the 64-bit version of the OS'es. And kernel compiled for x86_64. Problems seen: "Waiting for root file system..." If you get past this one, by compiling enough modules into the kernel, BUT then a lot of modules does not seem to be loaded (modprobe). Solution: The solution seems to be related to the modules.dep files generated on the Ubuntu system and copied to the debian system. Run the following commands on the debian system: depmod -a 2.6.31.3-ubuntu-compiled update-initramfs -u -k 2.6.31.3-ubuntu-compiled update-grub2 Which means: 1. update the modules.dep files 2. recreate the initrd.img 3. update the grub config Q: I don't know why a depmod update is required, anyone feel free to answer that question? Ubuntu 9.04: depmod -V module-init-tools 3.7-pre9 gcc --version gcc (Ubuntu 4.3.3-5ubuntu4) 4.3.3 Debian lenny: depmod -V module-init-tools 3.4 gcc --version gcc (Debian 4.3.2-1.1) 4.3.2 My reason for compiling on the Ubuntu system, is that its CPU is a Core i7, which can compile the kernel in 5 minuts where the Debian systems has a ATOM 330 CPU which uses 58 minuts to compile the same kernel... -- Med venlig hilsen / Best regards Jesper Brouer ComX Networks A/S Linux Network developer Cand. Scient Datalog / MSc. Author of http://adsl-optimizer.dk LinkedIn: http://www.linkedin.com/in/brouer