GRUB broken after upgrade on Macbook
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From: Sylvain Archenault on 10 Jul 2010 13:20 Hello, After upgrading GRUB to 20100706, I am no more able to boot linux on my macbook. When i choose from the refit menu to boot on my linux partition,GRUB is stuck with this message : "GRUB _" I boot with a live cd and chroot to the partition to reinstall it, but it didn't help. gptsync is happy: Current GPT partition table: # Start LBA End LBA Type 1 40 409639 EFI System (FAT) 2 409640 162946551 Mac OS X HFS+ 3 162946552 319196552 Basic Data 4 319196553 488392064 MS Reserved Current MBR partition table: # A Start LBA End LBA Type 1 1 409639 ee EFI Protective 2 409640 162946551 af Mac OS X HFS+ 3 * 162946552 319196552 83 Linux 4 319196553 488392064 c0 Unknown Status: Tables are synchronized, no need to sync. When running dpkg-reconfigure grub-pc, I got this: /usr/sbin/grub-setup: warn: Attempting to install GRUB to a partition instead of the MBR. This is a BAD idea.. /usr/sbin/grub-setup: warn: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged.. Installation finished. No error reported. I choosed /dev/sda3, which is my linux partition. The last grub version working was 20100617, so I tried to reinstall it, but it fails. I think something is wrong with the device map. dpkg: warning: downgrading grub-common from 1.98+20100706-1 to 1.98+20100617-1. (Reading database ... 133357 files and directories currently installed.) Preparing to replace grub-common 1.98+20100706-1 (using grub-common_1.98+20100617-1_i386.deb) ... Unpacking replacement grub-common ... dpkg: warning: downgrading grub-pc from 1.98+20100706-1 to 1.98+20100617-1. Preparing to replace grub-pc 1.98+20100706-1 (using grub-pc_1.98+20100617-1_i386.deb) ... Unpacking replacement grub-pc ... Setting up grub-common (1.98+20100617-1) ... Installing new version of config file /etc/grub.d/00_header ... Installing new version of config file /etc/grub.d/30_os-prober ... Installing new version of config file /etc/grub.d/10_linux ... Processing triggers for install-info ... Processing triggers for man-db ... Setting up grub-pc (1.98+20100617-1) ... Replacing config file /etc/default/grub with new version /usr/sbin/grub-setup: warn: Attempting to install GRUB to a partition instead of the MBR. This is a BAD idea.. /usr/sbin/grub-setup: warn: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged.. /usr/sbin/grub-setup: error: cannot read `/boot/grub/core.img' correctly. Generating grub.cfg ... Found background image: moreblue-orbit-grub.png Found linux image: /boot/vmlinuz-2.6.32-5-686 Found initrd image: /boot/initrd.img-2.6.32-5-686 Found linux image: /boot/vmlinuz-2.6.32-3-686 Found initrd image: /boot/initrd.img-2.6.32-3-686 Found linux image: /boot/vmlinuz-2.6.32-2-686 Found initrd image: /boot/initrd.img-2.6.32-2-686 How could i fix this? or having more info on why grub is stuck at boot time ? Thanks, Sylvain. -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4C38A640.2010506(a)laposte.net
From: Sylvain Archenault on 12 Jul 2010 08:00
I managed to fix this. I should have run "grub-install /dev/sda" at a moment instead of "/dev/sda3/" which lead to a corrupt mbr. I fixed this by clearing the mbr (http://ubuntuforums.org/showthread.php?t=811240): dd if=fakembr80.tx of=/dev/sda bs=512 count=1 and reinstalling grub: gptsync grub-install /dev/sda3 update-grub Sylvain. -- To UNSUBSCRIBE, email to debian-user-REQUEST(a)lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster(a)lists.debian.org Archive: http://lists.debian.org/4C3AFE80.3060002(a)laposte.net |