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Date:      Thu, 29 Oct 2020 02:11:46 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 203108] Thinkpad T420s will not boot GPT formatted disks.
Message-ID:  <bug-203108-227-clDW402jrd@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-203108-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-203108-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D203108

vidwer+fbsdbugs@gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |vidwer+fbsdbugs@gmail.com

--- Comment #4 from vidwer+fbsdbugs@gmail.com ---
(In reply to Allan Jude from comment #2)
> When doing the root-of-zfs install, cycle the partition type option from =
'GPT' to 'GPT + LenovoFix' and see if that solves it.

On a Lenovo ThinkPad E560, I tried adding 'ThinkPad E560' to this script:
https://github.com/freebsd/freebsd/blob/master/usr.sbin/bsdinstall/scripts/=
auto#L225

To install on UFS, one can select MBR or GPT. Only MBR will boot.

To install on ZFS, there are more options.
Using GPT: BIOS, UEFI, and BIOS+UEFI. Neither option will provide a bootable
installation.
Using MBR: BIOS, GPT + Active, and Lenovo fix. Neither option will provide a
bootable installation as well.

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