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natrix
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Joined: 23 Aug 2013
Posts: 532

PostPosted: Thu May 15, 2014 3:56 pm    Post subject: Unable to resolve root Reply with quote

Hi!!
In a new install of gentoo (it’s a PC diferent to https://forums.gentoo.org/viewtopic-t-991094.html), I compiled de kernel but the boot show it and the PC don´t start:

Code:
Failed to get fb_var. (errno=19)
!! Unable to resolve root: UUID=bc864e91-7f3b-41e8-8519-70e27c21b7bf
!! Please file a bug report with this message


How I fix it???

Thanks
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DONAHUE
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Joined: 09 Dec 2006
Posts: 7564
Location: Goose Creek SC

PostPosted: Thu May 15, 2014 5:35 pm    Post subject: Reply with quote

The kernel can not use UUID (file system identifier) to find the root partition
If your hard drive has a GPT partition table, the kernel can use PARTUUID to find the root partition, the kernel option format is root=PARTUUID=value found from running
Code:
blkid
example:
Quote:
/dev/sdc1: LABEL="OCZ128" UUID="f7bd2bec-3688-4336-8c63-e6921ae5e3bf" TYPE="reiserfs" PARTLABEL="OCZ128" PARTUUID="89bc9633-fbc9-4a90-8a67-e058cb655d95" Do not include quotes from blkid in the kernel option.
If GRUB2 is involved suggest manual edit of grub.cfg

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NeddySeagoon
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Joined: 05 Jul 2003
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PostPosted: Thu May 15, 2014 9:07 pm    Post subject: Reply with quote

DONAHUE,

That works with MSDOS Partition tables too.

I rather suspect the OP is using grub2 and its a grub issue.
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NeddySeagoon

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those that do backups
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natrix
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Joined: 23 Aug 2013
Posts: 532

PostPosted: Mon May 19, 2014 1:44 pm    Post subject: Reply with quote

Hi! This is my grub:

Code:
GRUB_GFXPAYLOAD_LINUX=1024x768
GRUB_DISTRIBUTOR="Gentoo"
GRUB_TIMEOUT=3
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_DEFAULT=saved
GRUB_CMDLINE_LINUX_DEFAULT='vga=791 splash=silent,theme:livedvd-12.0 console=tt$
GRUB_HIDDEN_TIMEOUT=0
GRUB_CMDLINE_LINUX="real_init=/usr/lib/systemd/systemd"
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wraeth
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Joined: 08 May 2007
Posts: 71
Location: Australia

PostPosted: Sat May 24, 2014 4:29 am    Post subject: Reply with quote

natrix wrote:
This is my grub:

That is you /etc/default/grub (a configuration file that gives some default options to GRUB2).

Can you please paste the contents of /boot/grub/grub.cfg; as well as the output of `blkid`?
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