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Suddenly I'm facing this problem and searched for a solution, but I couldn't find anything. My laptop is a Lenovo g5070.

error

This probably happened when the electricity came back, cause I had a problem with it, and laptop was working well without any problem before that. I have one system only Ubuntu 18.04.

This is what happened when I used journalctl -xb:

journalctl -xb output

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  • You need to give us way more details about your problem, and what you've tried to do to fix it.
    – heynnema
    Jan 22 '20 at 21:23
  • The usual problem occurred in the last session (power outage, you doing something that created it, or in a dual boot environment something done in the other installed OS), even though it's not noticed until power off & turned back on, or a reboot. Personally I'd boot a 'live' media & look at what was there & what was done, fsck or file system check your ssd/hdd, but I'd really be trying to recall what was done in the last session or since last session (the best clue is what occurred before this boot)
    – guiverc
    Jan 22 '20 at 21:29
  • sorry I posted the problem from mobile and attached screenshot but didn't appeared I'm trying now to post it again
    – sam
    Jan 22 '20 at 22:06
  • I edit the post
    – sam
    Jan 22 '20 at 22:58
  • status please...
    – heynnema
    Jan 26 '20 at 19:50
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Your image is too large and cuts of important parts but it DOES tell you want to do: view the log. The part WHAT log you need to view is cut off though so you need to examine that.

The text probably states:

Welcome to emergency mode! After logging in, type "journalctl -xb" to view system logs, "systemctl reboot" to reboot, "systemctl default" or ^D to try again to boot into dafault mode. Press Enter for maintenance (or press control-D to continue):

If the same use "enter" to go into maintenance mode or control-D to continue. Then do a

journalctl -xb

to view the log to find the problem that have it stop. And ...

systemctl reboot

to reboot.

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  • Thanks, I used the command and found the error with red line and posted it in the post
    – sam
    Jan 22 '20 at 22:59
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Your machine has MCE (machine check exception) errors. This usually means a hardware problem. Is your CPU or RAM overclocked?

However, let first your your filesystem...

For 18.04 or newer...

  • boot to a Ubuntu Live DVD/USB
  • open a terminal window by pressing Ctrl+Alt+T
  • type sudo fdisk -l
  • identify the /dev/sdXX device name for your "Linux Filesystem"
  • type sudo fsck -f /dev/sdXX, replacing sdXX with the number you found earlier
    • sudo fsck -f /dev/sda1
  • repeat the fsck command if there were errors
  • type reboot

Then let's check your memory...

Go to https://www.memtest86.com/ and download/run their free memtest to test your memory. Get at least one complete pass of all the 4/4 tests to confirm good memory. This may take many hours to complete.

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