Results 1 to 9 of 9

Thread: Can't boot

  1. #1
    Join Date
    Sep 2008
    Location
    KCMO area
    Beans
    90

    Can't boot

    I'm running a Mythbuntu server that has one drive for / and boot and such, then a pair of drives in a software raid. This machine is both my MythTV backend recording TV and my home fileserver. All other Ubuntu machines in the house mount an NFS share at boot. Everything was acting up so I rebooted my server and it sat at the startup splash screen. I then noticed one electrical outlet had the GFCI tripped that had one network switch on it. Well, now I am still stuck, I have tried rebooting a couple of times but it doesn't make it any further. My one Windows laptop is on my network just fine. Other Android devices are fine, but all Ubuntu based systems can't boot. I expect it comes down to this one server.

    So, it is stuck at the splash screen. I try ALT-F2 and get a blinking cursor at top and nothing else. When I insert a USB drive, I do get some feedback on that screen, but still no login or anything.

    When I try to ping my address I get response, so networking is up.

    When I browse from my Windows machine I can see the Samba shares and access the files that are shared.

    I guess I could boot with a live USB Ubuntu to fix things if I knew what to look at. Can anyone help me further?

  2. #2
    Join Date
    Sep 2008
    Location
    KCMO area
    Beans
    90

    Re: Can't boot

    I just booted off live USB and then installed gparted to remind myself of my partition layout. Looks like I created a mirrored boot partition. So I think I need to install mdadm to be able to look for logs and look at the config files... I am googling for that now, but I could still use some assistance for knowing what to look for once I get that mounted...

  3. #3
    Join Date
    Sep 2008
    Location
    KCMO area
    Beans
    90

    Re: Can't boot

    So I now have mdadm installed, array assembled, and now mounted. So I am looking for any advice on what I can look at to tell me where my issue is on boot... Anyone know the boot process?

  4. #4
    Join Date
    Sep 2008
    Location
    KCMO area
    Beans
    90

    Re: Can't boot

    OK, so nothing interesting that I see under the /var/log directory that is getting updated on this boot, all timestamps here look like they are from the day I did the initial reboot. What can I do with grub to help me see what is happening? I don't think I mentioned that I am on 12.04 Mythbuntu.

  5. #5
    Join Date
    Jan 2011
    Location
    Bournemouth UK
    Beans
    211
    Distro
    Kubuntu 16.04 Xenial Xerus

    Re: Can't boot

    Quote Originally Posted by Boppy3125 View Post
    OK, so nothing interesting that I see under the /var/log directory that is getting updated on this boot, all timestamps here look like they are from the day I did the initial reboot. What can I do with grub to help me see what is happening? I don't think I mentioned that I am on 12.04 Mythbuntu.
    Boppy- No-one seems to be assisting you with this, so I'll stick my 5 eggs in. Have you tried update-grub? It may be as simple as running this. You will have to do it from a live cd/dvd and a chroot environment to make it work. run blkid or fdisk -l as root to see which sd(x) is.
    Code:
    mount /dev/sdx /mnt
    mount --bind /dev /mnt/dev
    mount --bind /dev/pts /mnt/dev/pts
    mount --bind /sys /mnt/sys
    mount --bind /proc /mnt/proc
    chroot /mnt
    #I think, trying to remember off top of my head
    this gets you into your system, then you can run
    Code:
    update-grub
    and
    Code:
    grub-install /sdx
    Get out of the chroot environment with cntl-d

    and gracefully unmount
    Code:
    umount /mnt/dev/pts
    umount /mnt/dev
    umount /mnt/sys
    umount /mnt/proc
    umount /mnt
    reboot.

    Let us know.
    Tony.
    Asus Z270 i7 16gb ram 8.25tb GT960 TSB6205 Quad tuner 64-bit Mint 18.2 Sonya KDE & win 10 Be/FE myth 0.28
    Laptop Samsung NP R580 i5 nvidia linux ultimate & win 10 Homerun dual netwk tuner 55¨ Samsung ES8000

  6. #6
    Join Date
    Sep 2008
    Location
    KCMO area
    Beans
    90

    Re: Can't boot

    Thank you for your response. I was able to tweak what you gave me and reinstall grub. (Some sudo and changing out md0 and finally pointing to each my drives rather than partitions)

    No joy though. It is still stuck on the mythbuntu splash screen with the dots going by. They just keep marching by, but I don't make any progress...

    Again, network seems to be up, samba server seems to be up, but that seems like all. Based on what I just tried I think the filesystem for boot seems intact. I just wish I could find some logs that could tell me what is happening.

    I guess maybe tomorrow night I will try to go back to my live USB env and mount the md0 dev again, and add an export of / so I can try to mount that from another computer while it is in this state. But that will be tomorrow.

    Thanks for the idea Tony.

  7. #7
    Join Date
    Jan 2011
    Location
    Bournemouth UK
    Beans
    211
    Distro
    Kubuntu 16.04 Xenial Xerus

    Re: Can't boot

    Quote Originally Posted by Boppy3125 View Post
    Thank you for your response. I was able to tweak what you gave me and reinstall grub. (Some sudo and changing out md0 and finally pointing to each my drives rather than partitions)

    No joy though. It is still stuck on the mythbuntu splash screen with the dots going by. They just keep marching by, but I don't make any progress...

    Again, network seems to be up, samba server seems to be up, but that seems like all. Based on what I just tried I think the filesystem for boot seems intact. I just wish I could find some logs that could tell me what is happening.

    I guess maybe tomorrow night I will try to go back to my live USB env and mount the md0 dev again, and add an export of / so I can try to mount that from another computer while it is in this state. But that will be tomorrow.

    Thanks for the idea Tony.
    Boppy-

    You've got the marching dots-you could try disabling the "quiet-splash" in the (once again from memory-hope I get it right-at work now with only windoze machines for company) /etc/default/grub.conf or cnf, and edit that file so you just get a text boot.

    Hopefully it will hang at the salient point and give you a clue as to what gives.

    Tony
    Asus Z270 i7 16gb ram 8.25tb GT960 TSB6205 Quad tuner 64-bit Mint 18.2 Sonya KDE & win 10 Be/FE myth 0.28
    Laptop Samsung NP R580 i5 nvidia linux ultimate & win 10 Homerun dual netwk tuner 55¨ Samsung ES8000

  8. #8
    Join Date
    Sep 2008
    Location
    KCMO area
    Beans
    90

    Re: Can't boot

    That helped. I have it fixed now. Thanks.

    For anyone coming across this later, some further detail... So I needed to edit my mounted drive's /etc/default/grub file looking for GRUB_CMDLINE_LINUX_DEFAULT, changing "quiet splash" to "". Oh, then I had to follow some steps from your #5 post of the mounts and chroot then I could sudo update-grub. (I forgot to do that part first time and didn't understand why the splash was still happening.)

    That allowed me to see the progress where I saw it hang for about 2 minutes starting NFS, then pop a message about a mount failing. That was the issue. I had recently shutdown my previous MythTV server, but this was the first reboot of the new server since that was shut down. The mount was needed for migrating data over. I just simply edited my /etc/fstab file and commented out that line. Now everything is back running.

    Ubuntu is trying to make everything user friendly by hiding all that boot progress, but that really makes it hard to see what breaks...

    Thanks again for your help, Tony. I couldn't have done it without your help.

  9. #9
    Join Date
    Jan 2011
    Location
    Bournemouth UK
    Beans
    211
    Distro
    Kubuntu 16.04 Xenial Xerus

    Re: Can't boot

    You're welcome, it's what open-source is all about.
    Tony
    Asus Z270 i7 16gb ram 8.25tb GT960 TSB6205 Quad tuner 64-bit Mint 18.2 Sonya KDE & win 10 Be/FE myth 0.28
    Laptop Samsung NP R580 i5 nvidia linux ultimate & win 10 Homerun dual netwk tuner 55¨ Samsung ES8000

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •