I solved it, after some advice from yesterday's meeting. The first
(and easiest) that I tried was to disconnect the Windows hard disk,
and retry installing Ubuntu 15.10. I was surprised by a message about
possible other UEFI installed OSes, although there were none.
But from this message, I understood that Ubuntu knew (and assumed
complied to) UEFI. I was not sure until then, as I saw articles on
modifying an Ubuntu ISO to make it UEFI-compliant. Anyway, I left the
Windows disk disconnected, but re-enabled the UEFI. Boot Ubuntu ISO,
and did not get htis error message anymore. So I shutdown and actually
re-connected the Windows disk, and tried the actual install of Ubuntu,
as I tried so many times previously. It went actually all the way, no
problem.
So the lesson: Do not assume UEFI is gonna cause you grief
immediately. Do not disable it and try first. I was so sure that UEFI
would cause issues, that I tried to disable it first, while I should
have left it alone.
On Tue, 2016-03-01 at 22:12 +0000, jf [ at ] messier [ dot ] ca wrote:
Everything goes fine until the very end, when installing the
bootloader. I get an error message saying that it cannot write the
bootloader. None of the three options worked, actually. The first
was
to retry on another disk/partition, the second was to install no
bootloader whatsoever, and the third was to cancel the install. BUT
NO
OPTION ACTUALLY WORKED. They all came back to the same error message.
Reboot from the USB key, and try to manually run grub-install
/dev/sda. Also get an error message.
Anyone has an idea what I did wrong ? I set the motherboard to be
in
Legacy mode. This is a recent ASUS motherboard, on a Intel Core i3
system.
Hi Jean-Francois,
Newer PC builds and kits might be using UEFI booting protocols instead
of the older legacy BIOS protocols; hence, grub2 (ie: not legacy GRUB
grub) does have provisions for booting from a UEFI system.
This means that you have can either disable the UEFI mode onboard or
install a Linux distribution that has the necessary certificates to
allow UEFI secure bootup. Disabling UEFI would probably result in
problems in booting Windows Bootloader, so it is probably not the best
solution in your case, unless you want to go all Linux and legacy boot.
There are other workarounds which can defeat the UEFI, but they are
very klutzy and do reduce security, so it really would be at your
discretion whether you can handle those risks.
The best solution is to use a Linux distribution that has the necessary
UEFI (SecureBoot) certificates: I believe some flavours of Ubuntu have
this and I know that Fedora 23 has it (Does anybody else know of which
distros can boot UEFI transparently?)
HTH (Hope this helps)
Sincerely,
Frank
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