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[bug #53697] GRUB can't find root device

From: Oleg Solovyov
Subject: [bug #53697] GRUB can't find root device
Date: Thu, 19 Apr 2018 05:51:52 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0


                 Summary: GRUB can't find root device
                 Project: GNU GRUB
            Submitted by: mcpain
            Submitted on: Thu 19 Apr 2018 12:51:49 PM MSK
                Category: Booting
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: Git master
         Reproducibility: Every Time
         Planned Release: None



I have installed system using partitions:
ext4 /boot, LVM ( ext4-luks /, ext4-luks /home )

After calling update-grub I notice that the 'root' parameter in grub-cfg is

The reason is that grub-probe returns empty string if it tries to find a root

The grub-probe software checks whether device have name like "/dev/dm-X" by
checking their basename.
But device can have name like "/dev/mapper/dm-0-luks" and grub-probe skips
that device (which is root)

Fix attached as patchfile


File Attachments:

Date: Thu 19 Apr 2018 12:51:49 PM MSK  Name: grub.patch  Size: 488B   By:



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