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From: Mick <michaelkintzios@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] EFI install ( continum) [ system hangs at boot ]
Date: Fri, 27 Feb 2015 19:39:11 +0000
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References: <20150227065332.dba99abfca4497c933f57beb@gmail.com> <20150227141504.29a8398b@digimed.co.uk> <20150227101418.7858f7404b7ef258c0de98fc@gmail.com>
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On Friday 27 Feb 2015 15:14:18 German wrote:
> On Fri, 27 Feb 2015 14:15:04 +0000
>=20
> Neil Bothwick <neil@digimed.co.uk> wrote:
> > On Fri, 27 Feb 2015 07:49:20 -0500, German wrote:
> > > > The kernel cannot find the block device containing your root
> > > > filesystem. Either you have given the wrong root=3D option to the
> > > > kernel
> > >=20
> > > Are you talking about this?
> > >=20
> > > "UEFI does not pass kernel parameters to the kernel during normal boo=
t,
> > > so you need to hardcode them via CONFIG_CMDLINE. Example for the root
> > > partition on /dev/sda2: KERNEL Enable built-in kernel parameters
> > >=20
> > > Processor type and features --->
> > >=20
> > > [*] Built-in kernel command line
> > > (root=3D/dev/sda2)"
> >=20
> > Yes, if you are not using a boot manager.
>=20
> Hmm.. I was using some sort of boot manager, efibootmgr, however there was
> no word in install docs how to configure it to point to root device.. So,
> are you advising on gummiboot? Are people happy with it? I found gentoo
> wiki how to configure it, so I must give it a try. Thanks for your input,
> I guess the problem is solved now. On to the next install with gummi
You can still use the kernel stub to boot directly your OS, but you may nee=
d=20
to specify the root fs, if it is BTRFS (not sure about others):
$ grep CONFIG_CMDLINE /usr/src/linux/.config
# CONFIG_CMDLINE_PARTITION is not set
CONFIG_CMDLINE_BOOL=3Dy
CONFIG_CMDLINE=3D"root=3D/dev/sda2 rootfstype=3Dbtrfs"
# CONFIG_CMDLINE_OVERRIDE is not set
Also the fs type should be built directly in the kernel, rather than a modu=
le.
=2D-=20
Regards,
Mick
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