Now it is time for me to say thank you :-) First of all, *I want to thank everybody contributing* to solving this bug, or complex of bugs, concerning Pentium M and Celeron M CPUs and new Ubuntu based kernels.
Then I want to mention roland aus köln (devzero-c), who continued pushing this issue when we had given up (either completely or like me, resorting to work-arounds). And I want to thank Chris Bainbridge, who was able to do the actual bug- fixes that made the ship turn around. I don't know if you are a developer or a very skilled user, but you made a great difference. Finally I want to thank you Chris for sharing the link to instructions, that actually got me over the threshold to build a custom syslinux bootable system. I'm working right now on a debian system, that should be able to install from a CD/DVD or USB drive to very different systems (including very old and limited systems) by flashing compressed image files (img.xz files) or iso files and growing the file system when there is extra space available. I show the link again for everybody else, who might be interested. It works for me with a couple of minor tweaks, the main one that I needed to import a gpg key separately. Best regards sudodus alias Nio ----- Comment #279 ----- Chris Bainbridge (chris-bainbridge) wrote on 2014-03-03: #279 lkml: "grub is jumping to the 32-bit entry point and skipping the entire real mode setup code. Bad grub." You don't need to build a syslinux bootable iso. You can boot the kernel from Grub in 16-bit mode by using the linux16 command http://www.gnu.org/software/grub/manual/html_node/linux16.html and initrd16 https://www.gnu.org/software/grub/manual/html_node/initrd16.html According to the discussion on LKML, linux16 is now the default on Fedora, and should be used by other distributions. (If you still want to build a custom syslinux bootable system, just for fun, see the instructions at http://willhaley.com/blog/create-a-custom-debian-live-environment/ - it's about 25 lines of code in total, and not difficult to follow) ----- -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/930447 Title: Unable to start Ubuntu 12.04 live CD with syslinux loader on Pentium M x86 Laptop due to bug in PAE kernel, initramfs or syslinux Status in “linux” package in Ubuntu: Fix Released Status in “syslinux” package in Ubuntu: Invalid Status in Baltix GNU/Linux: Triaged Bug description: Ubuntu 12.04 doesn't start from Desktop CD or USB with syslinux boot loader on Pentium M 1.6Ghz or faster Pentium M CPU - displays error message about missing PAE feature in CPU, but *the same* *Ubuntu 12.04* Desktop CD/LiveUSB starts fine on *the same CPU* (and same PAE kernel) if GRUB boot loader is used, for example when WUBI or LiveUSB with GRUB boot loader, like Multisystem (http://liveusb.info/dotclear/index.php?pages/install ) is used! The error message is: "This kernel requires the following features not present on the CPU: pae. Unable to boot - please use a kernel appropriate for you CPU." THIS IS AN IMPORTANT REGRESSION! People are able to install and successfully use Ubuntu 12.04 on such pretty new hardware, like IBM Thinkpad T42 laptop with Pentium M 1700Mhz processor, but the bug in syslinux (or something related) forbids Ubuntu 12.04 installation. This bug is reproducible on lots of computers, there are several log files and /proc/cpuinfo file attached to this bugreport, AFAIK it's enough to reopen this bug. --- ApportVersion: 1.23-0ubuntu4 Architecture: i386 CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied MachineType: IBM 2373PPU dmi.bios.date: 06/18/2007 dmi.bios.vendor: IBM dmi.bios.version: 1RETDRWW (3.23 ) dmi.board.name: 2373PPU dmi.board.vendor: IBM dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: IBM dmi.chassis.version: Not Available dmi.modalias: dmi:bvnIBM:bvr1RETDRWW(3.23):bd06/18/2007:svnIBM:pn2373PPU:pvrThinkPadT42:rvnIBM:rn2373PPU:rvrNotAvailable:cvnIBM:ct10:cvrNotAvailable: dmi.product.name: 2373PPU dmi.product.version: ThinkPad T42 dmi.sys.vendor: IBM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/930447/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp