amd64/185623: [install] freebsd 10.0-RC5 fresh install does not boot on asus h87m-e

Nathan Whitehorn nwhitehorn at
Fri Feb 14 13:53:38 UTC 2014

On 01/28/14 09:57, John Baldwin wrote:
> On Wednesday, January 22, 2014 4:40:01 pm Ryan Stark wrote:
>> The following reply was made to PR amd64/185623; it has been noted by GNATS.
>> From: Ryan Stark <rstark at>
>> To: <bug-followup at>, <nospam at>
>> Cc:
>> Subject: Re: amd64/185623: [install] freebsd 10.0-RC5 fresh install does not
>>   boot on asus h87m-e
>> Date: Wed, 22 Jan 2014 15:34:56 -0600
>>   Hash: SHA512
>>   Hello,
>>   Seems with a little homework, I was able to boot my new 10.0-RELEASE OS. =)
>>   After install, but before reboot, run: gpart set -a active ada0
>>   It appears that other asus users of H85 & H87 motherboards are
>>   experiencing the same issue.
> Hmm, the installer for FreeBSD/{amd64,i386} is supposed to do this
> automatically.  We used to set this in the PMBR by default for all GPT setups,
> but that isn't really correct for the GPT standard and needs to not be present
> when using EFI.  The solution was supposed to be that we would stop setting it
> in the PMBR by default and change the installer to set this bit when doing a
> non-EFI GPT install on x86.  I think the first part of that (not setting
> active by default) happened in 10, but not the second part (fix the installer
> for non-EFI GPT installs on x86).  I've cc'd some folks who've worked on
> bsdinstall who can hopefully get this fixed.

Interesting, I wasn't aware of this change. So this is an attribute of 
the entire geom? It's an easy enough change to make, but I want to be 
sure I'm doing the right thing.

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