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Thread: Computer won't boot anymore, /dev/shm and /boot won't mount

  1. #1
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    Computer won't boot anymore, /dev/shm and /boot won't mount

    My computer's no longer booting. I rebooted because of a kernel update after 12 days of uptime, and for seemingly no reason I now get this error:



    I usually get an error saying /dev/shm is already mounted, but it continues booting, but now nothing is booting! It just hangs as you see in the screenshot.

    I am not able to choose any options when it says:
    Code:
    keys:Press S to skip mounting or M for manual recovery
    about /boot because it immediately shows the password prompt for my second disk.

    EDIT: If I rapidly press "S" after entering my first password but before my second one apparently skips mounting /boot and my computer is able to boot, but the boot partition (/dev/sdb1) has to be mounted manually if I want to access files in /boot. And when I boot up apparently my computer will try creating /boot (because it isn't mounted it thinks it doesn't exist) and puts the directory "grub" in there.

    Why isn't /boot mounting correctly at startup anymore?
    Last edited by Stonecold1995; December 13th, 2012 at 08:30 AM.
    The whole thing is so patently infantile, so foreign to reality, that to anyone with a friendly attitude to humanity it is painful to think that the great majority of mortals will never be able to rise above this view of life.
    ~Sigmund Freud

  2. #2
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    Re: Computer won't boot anymore, /dev/shm and /boot won't mount

    This is what the man page states about system error 2. Maybe someone out there will know what to do with this.

    2

    system error (out of memory, cannot fork, no more loop devices)
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  3. #3
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    Re: Computer won't boot anymore, /dev/shm and /boot won't mount

    Have you run fsck against the partition where boot is located? Do that in recovery mode or after booting from a CD/USB drive.
    If you ask for help, please have the courtesy to check for responses and thank the people who helped you.

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  4. #4
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    Re: Computer won't boot anymore, /dev/shm and /boot won't mount

    Quote Originally Posted by SeijiSensei View Post
    Have you run fsck against the partition where boot is located? Do that in recovery mode or after booting from a CD/USB drive.
    Yes, and /boot is not corrupt. From what I can tell, it mounts very early on in the boot process (which is why GRUB works and the kernel can start its thing), but as soon as the computer begins to mount / and /home (and /tmp, etc), /boot is unable to mount, so I have to rapidly press "S" to skip mounting it.
    Last edited by Stonecold1995; December 14th, 2012 at 01:48 AM.
    The whole thing is so patently infantile, so foreign to reality, that to anyone with a friendly attitude to humanity it is painful to think that the great majority of mortals will never be able to rise above this view of life.
    ~Sigmund Freud

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    Re: Computer won't boot anymore, /dev/shm and /boot won't mount

    I see that it trips over (possible stale) entry's in /etc/mtab.

    Try removing the references to the troubled mountpoints located in /etc/mtab and try again.
    linux-git/fs/super.c: "Self-destruct in 5 seconds. Have a nice day...\n",

  6. #6
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    Re: Computer won't boot anymore, /dev/shm and /boot won't mount

    Quote Originally Posted by Rexilion View Post
    I see that it trips over (possible stale) entry's in /etc/mtab.

    Try removing the references to the troubled mountpoints located in /etc/mtab and try again.
    Code:
    /dev/mapper/sdb5_crypt / ext4 rw,noatime,discard,errors=remount-ro 0 0
    proc /proc proc rw,noexec,nosuid,nodev 0 0
    sysfs /sys sysfs rw,noexec,nosuid,nodev 0 0
    none /sys/fs/fuse/connections fusectl rw 0 0
    none /sys/kernel/debug debugfs rw 0 0
    none /sys/kernel/security securityfs rw 0 0
    udev /dev devtmpfs rw,mode=0755 0 0
    devpts /dev/pts devpts rw,noexec,nosuid,gid=5,mode=0620 0 0
    tmpfs /tmp tmpfs rw,mode=1777 0 0
    tmpfs /run tmpfs rw,noexec,nosuid,size=10%,mode=0755 0 0
    none /run/lock tmpfs rw,noexec,nosuid,nodev,size=5242880 0 0
    tmpfs /run/shm tmpfs rw,nosuid,nodev 0 0
    none /run/user tmpfs rw,noexec,nosuid,nodev,size=104857600,mode=0755 0 0
    /dev/mapper/sda1_crypt /home ext4 rw,noatime,errors=remount-ro 0 0
    binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,noexec,nosuid,nodev 0 0
    /dev/sdb1 /boot ext2 rw 0 0
    Is there anything wrong with my /etc/mtab?
    The whole thing is so patently infantile, so foreign to reality, that to anyone with a friendly attitude to humanity it is painful to think that the great majority of mortals will never be able to rise above this view of life.
    ~Sigmund Freud

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    Re: Computer won't boot anymore, /dev/shm and /boot won't mount

    Your mtab mensions '/dev/sdb1 /boot'. Is it really mounted? If not, than that could be a problem. However, I think that it's not the root cause...

    Can you provide the output of:

    'sudo dmesg' and paste it on pastebin.com? Boot sequence mentions FS issue's...
    linux-git/fs/super.c: "Self-destruct in 5 seconds. Have a nice day...\n",

  8. #8
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    Re: Computer won't boot anymore, /dev/shm and /boot won't mount

    Quote Originally Posted by Rexilion View Post
    Your mtab mensions '/dev/sdb1 /boot'. Is it really mounted? If not, than that could be a problem. However, I think that it's not the root cause...
    It says it's mounted in /etc/mtab but it doesn't mount. I have to mount it manually after my computer starts.

    Quote Originally Posted by Rexilion View Post
    Can you provide the output of:

    'sudo dmesg' and paste it on pastebin.com? Boot sequence mentions FS issue's...
    http://pastebin.com/JWxPya4V
    The whole thing is so patently infantile, so foreign to reality, that to anyone with a friendly attitude to humanity it is painful to think that the great majority of mortals will never be able to rise above this view of life.
    ~Sigmund Freud

  9. #9
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    Re: Computer won't boot anymore, /dev/shm and /boot won't mount

    Could you reboot and paste dmesg again?

    I see almost solely messages like these:

    '[30410.746082] CPU4: Package power limit normal'

    Do you overclock or something??
    linux-git/fs/super.c: "Self-destruct in 5 seconds. Have a nice day...\n",

  10. #10
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    Re: Computer won't boot anymore, /dev/shm and /boot won't mount

    Quote Originally Posted by Rexilion View Post
    Could you reboot and paste dmesg again?

    I see almost solely messages like these:

    '[30410.746082] CPU4: Package power limit normal'

    Do you overclock or something??
    http://pastebin.com/0vEby1wy

    No, I don't overclock. I run Folding@home 24/7 so my CPU usage stays at around 90%. I'm using a laptop but it's a high-end gaming laptop so it has very good ventilation.
    The whole thing is so patently infantile, so foreign to reality, that to anyone with a friendly attitude to humanity it is painful to think that the great majority of mortals will never be able to rise above this view of life.
    ~Sigmund Freud

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