Ubuntu 10.04 upgrade causes: mount: mounting none on /dev failed: no such device

[l0uismustdie]

I posted a similar problem sometime last week...but a little has changed(mainly I can access my files now):

I recently performed the auto upgrade to Ubuntu 10.04 and upon restart of my machine I am presented with 3 screens. The first is a simple "GRUB loading". The second is "mount: mounting none on /dev failed: no such device". The third screen is a series of initializations, i.e. /dev/sda1: clean, (number of files), (number of blocks)
*setting preliminary keymap...
and so on until it hits the line:
*checking battery status
at which point it will cease loading until i press the power button. The next thing that occurs is it kills all the processes it just initialized and shuts down the computer.

I read that this is likely a problem from loading the wrong kernel and I can get into my files (using a boot 9.10 boot key). The problem is I don't know what files to change in order to get my system booting the right kernel.

Thanks in advance,
Josh

[u01p2109]

After Upgrade You should run $sudo grub-install /dev/sda
But You didn`t.
https://wiki.ubuntu.com/LucidLynx/Re...pdating%20grub

[l0uismustdie]

Unfortunately this doesn't fix my problem. Since I can no longer directly log on to my machine I have to boot from a floppy and mount my drive from there. Upon running the command:
sudo grub-install /dev/sda
I am presented with the error:
grub-probe: error: cannot find a device for /boot/grub

No path or device is specified
When I look at the grub-probe --help it states that grub-install copies GRUB images into the DIR/boot directory. So, even when I try to mount my drive to / this still doesn't work.

Any other takers?

[leorolla]

Maybe using the chroot trick from the GRUB2 tutorials will help.

[Penguin Guy]

Unfortunately this doesn't fix my problem. Since I can no longer directly log on to my machine I have to boot from a floppy and mount my drive from there. Upon running the command:
sudo grub-install /dev/sda
I am presented with the error:
grub-probe: error: cannot find a device for /boot/grub?

That's because you're inside a chroot. Try binding the system folders you need:

mount --bind /dev /mnt/chroot/dev
mount --bind /proc /mnt/chroot/proc

[l0uismustdie]

I'm still a little confused here what all of you are trying to get at. So here is what I just tried:
sudo mount /dev/sda1 /mnt
sudo mount --bind /dev /mnt/chroot/dev
mount: mount point /mnt/chroot/dev does not exists

Which makes sense...what am I trying to bind?
I also tried:
sudo mount --bind /boot /mnt/boot
sudo grub-install /dev/sda

This resulted in the same error.

Thanks for all your replies.

[darkod]

Hold on, stop for a moment.

1. You don't chroot that way, the commands are incomplete.

2. What are you actually trying to do? Obviously you have grub2 because you see the message it's loading and then it tries to load ubuntu. But your root partition doesn't seem to get mounted. So what is the plan after you chroot?

If you want more detailed view of the boot process, download the boot info script, run it and post the content of the results file as explained here:
http://ubuntuforums.org/showpost.php...01&postcount=4

[l0uismustdie]

Yeah, I don't have a plan. What I am trying to do is get my system to boot again without using a usb key and then mounting my hard disk.

Results:

                Boot Info Script 0.55    dated February 15th, 2010                    

============================= Boot Info Summary: ==============================

 => Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in 
    partition #1 for /mnt/boot/grub.
 => Syslinux is installed in the MBR of /dev/sdb

sda1: _________________________________________________________________________

    File system:       ext4
    Boot sector type:  -
    Boot sector info:  
    Operating System:  Ubuntu 10.04 LTS
    Boot files/dirs:   /etc/fstab

sda2: _________________________________________________________________________

    File system:       Extended Partition
    Boot sector type:  -
    Boot sector info:  

sda5: _________________________________________________________________________

    File system:       swap
    Boot sector type:  -
    Boot sector info:  

sdb1: _________________________________________________________________________

    File system:       vfat
    Boot sector type:  Fat32
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files/dirs:   

=========================== Drive/Partition Info: =============================

Drive: sda ___________________ _____________________________________________________

Disk /dev/sda: 60.0 GB, 60022480896 bytes
255 heads, 63 sectors/track, 7297 cylinders, total 117231408 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0xa71ba71b

Partition  Boot         Start           End          Size  Id System

/dev/sda1    *             63   112,342,544   112,342,482  83 Linux
/dev/sda2         112,342,545   117,226,304     4,883,760   5 Extended
/dev/sda5         112,342,608   117,226,304     4,883,697  82 Linux swap / Solaris


Drive: sdb ___________________ _____________________________________________________

Disk /dev/sdb: 1058 MB, 1058275328 bytes
2 heads, 63 sectors/track, 16404 cylinders, total 2066944 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x00193dca

Partition  Boot         Start           End          Size  Id System

/dev/sdb1    *             32     2,066,943     2,066,912   b W95 FAT32


blkid -c /dev/null: ____________________________________________________________

Device           UUID                                   TYPE       LABEL                         

/dev/loop0                                              squashfs                                 
/dev/sda1        14eac46e-1134-4aaa-ad34-bcc3f6c6dfb6   ext4                                     
/dev/sda5        ae2f104b-e67c-40e1-afcd-b962e05a664b   swap                                     
/dev/sdb1        565E-2001                              vfat                                     

============================ "mount | grep ^/dev  output: ===========================

Device           Mount_Point              Type       Options

aufs             /                        aufs       (rw)
/dev/sdb1        /cdrom                   vfat       (rw)
/dev/loop0       /rofs                    squashfs   (rw)
/dev/sda1        /mnt                     ext4       (rw)
/dev             /mnt/dev                 none       (rw,bind)


=============================== sda1/etc/fstab: ===============================

# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    defaults        0       0
# / was on /dev/sda1 during installation
UUID=14eac46e-1134-4aaa-ad34-bcc3f6c6dfb6 /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda5 during installation
UUID=ae2f104b-e67c-40e1-afcd-b962e05a664b none            swap    sw              0       0

[darkod]

sda1: __________________________________________________ _______________________

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.04 LTS
Boot files/dirs: /etc/fstab

You don't have the /boot/grub folder and any of the boot files. I wonder whether grub2 was installed at all, or simply the boot files are missing. Because it's different fix.

Lets first try to recreate grub.cfg by chroot into the install:

sudo mount /dev/sda1 /mnt
sudo mount --bind /proc /mnt/proc
sudo mount --bind /dev /mnt/dev
sudo mount --bind /sys /mnt/sys
sudo chroot /mnt
grub-mkconfig
update-grub
grub-install /dev/sda
exit
sudo umount /mnt/sys
sudo umount /mnt/dev
sudo umount /mnt/proc

Restart and see what happens.

[l0uismustdie]

Thanks for replying so quick.

Everything works until:
grub-mkconfig
This gives me a familiar error: grub-probe: error: cannot find device for /boot
So I tried one more step:
mount --bind /boot /mnt/boot
no luck here either.