seems rather a grub2 issue than a gksu one
** Package changed: gksu (Ubuntu) = grub2 (Ubuntu)
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grub adds root UUID line which causes error 15
https://bugs.launchpad.net/bugs/346713
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*** This bug is a duplicate of bug 376879 ***
https://bugs.launchpad.net/bugs/376879
** This bug has been marked a duplicate of bug 376879
grub2 installer modifies grub 0.97 menu.lst incorrectly and fails to
chainload grub2
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grub adds root UUID line which causes error 15
** Attachment added: dmesg.txt
http://launchpadlibrarian.net/24206447/dmesg.txt
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grub adds root UUID line which causes error 15
https://bugs.launchpad.net/bugs/346713
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
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ubuntu-bugs
** Attachment added: lspci.txt
http://launchpadlibrarian.net/24206451/lspci.txt
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grub adds root UUID line which causes error 15
https://bugs.launchpad.net/bugs/346713
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
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ubuntu-bugs
** Attachment added: grub.cfg
http://launchpadlibrarian.net/24206459/grub.cfg
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grub adds root UUID line which causes error 15
https://bugs.launchpad.net/bugs/346713
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
--
ubuntu-bugs
** Attachment added: menu.lst_backup_by_grub2_postinst
http://launchpadlibrarian.net/24206462/menu.lst_backup_by_grub2_postinst
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grub adds root UUID line which causes error 15
https://bugs.launchpad.net/bugs/346713
You received this bug notification because you are a member of Ubuntu
Bugs,
looks like the grub2 upgrade replaced all my uuid UUIDUUIDUUID lines
with root UUIDUUIDUUID... lines in the grub 1 conf.
** Attachment added: menu.lst
http://launchpadlibrarian.net/24206502/menu.lst
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grub adds root UUID line which causes error 15
https://bugs.launchpad.net/bugs/346713
You