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Thread: Invalid Signature when trying to boot Lubuntu (Dual Boot)

  1. #1
    Join Date
    Jan 2010
    Location
    India
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    Distro
    Ubuntu 16.04 Xenial Xerus

    Invalid Signature when trying to boot Lubuntu (Dual Boot)

    Hi,

    After installing ZFS support in Lubuntu using the ZFS PPA I installed PCBSD using available free space. After installation I found that PCBSD's grub has overwritten Ubuntu's grub but Lubuntu was not detected.

    So I manually added an entry for Lubuntu in /usr/local/etc/grub.d/40_custom.
    Code:
    cat /usr/local/etc/grub.d/40_custom
    #!/bin/sh
    exec tail -n +3 $0
    # This file provides an easy way to add custom menu entries.  Simply type the
    # menu entries you want to add after this comment.  Be careful not to change
    # the 'exec tail' line above.
    
    menuentry "lubuntu" {
        set root='(hd0,1)'
        chainloader +1
        }

    Code:
     	   	fdisk ada0
    ******* Working on device ada0 *******
    parameters extracted from in-core disklabel are:
    cylinders=310101 heads=16 sectors/track=63 (1008 blks/cyl)
    
    Figures below won't work with BIOS for partitions not in cyl 1
    parameters to be used for BIOS calculations are:
    cylinders=310101 heads=16 sectors/track=63 (1008 blks/cyl)
    
    Media sector size is 512
    Warning: BIOS sector numbering starts with sector 1
    Information from DOS bootblock is:
    The data for partition 1 is:
    sysid 131 (0x83),(Linux native)
        start 2048, size 48828125 (23841 Meg), flag 0
    	beg: cyl 0/ head 32/ sector 33;
    	end: cyl 1023/ head 254/ sector 63
    The data for partition 2 is:
    sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
        start 48830464, size 255858688 (124931 Meg), flag 0
    	beg: cyl 1023/ head 254/ sector 63;
    	end: cyl 1023/ head 254/ sector 63
    The data for partition 3 is:
    sysid 130 (0x82),(Linux swap or Solaris x86)
        start 304689548, size 7887157 (3851 Meg), flag 0
    	beg: cyl 1023/ head 254/ sector 63;
    	end: cyl 1023/ head 254/ sector 63
    The data for partition 4 is:
    <UNUSED>





    I noticed that update-grub or update-grub2 doen't work under BSD but after reboot I saw the entry for Lubuntu but I select lubuntu and press enter I get

    Code:
    'Error: Invalid Signature'
    How to solve this ?
    Last edited by linuxyogi; September 14th, 2014 at 01:20 PM.
    Ubuntu 16.04
    free
    showing high ram usage ? Read this
    When people say "you've changed " there's a 95% chance that you just stopped acting the way they wanted you to.

  2. #2
    Join Date
    May 2007
    Location
    The New Forest
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    Hidden!
    Distro
    Xubuntu

    Re: Invalid Signature when trying to boot Lubuntu (Dual Boot)

    Thread moved to Other Operating Systems and Projects.

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