Can Kubuntu 15.10 normally recover from a mains power failure?

Computer will not boot normally - always goes to Emergency Mode.

In the emergency mode i tried the options there - no result.


  • In the end, it was very simple! The monitor is very bad, so the text cmds. on the emergency screen was not what i saw.

I was able after this to get the log, and delete the file stopping the normal boot.


Sure, but it depends what you mean by recover.

The ability of a computer to recover on any operating system depends on the following things:

  • Resilient hardware. Power failures are indicative of poor power networks. These can otherwise fry cheap and bad components. If you get a power spike post-cut (as is very common) your computers might suffer hardware failure.

  • Is BIOS set to turn back on after a power cut?

  • Disk integrity. Are your partitions using journalled write buffers? Are RAID cards using battery backed write buffers?

  • Are you applications saving stuff automatically?

So we can look at software and I'd certainly make sure things you use a lot are doing autosaves, but if you're in a situation where failure is likely, I'd seriously recommend sticking a battery between the computer and the grid.

You can configure Ubuntu to suspend on power failure. For most desktops this means you can get many hours of suspend. That's usually enough to get you through all but the worst power cuts and if that looks likely, you might have enough power to resume and save what you need.

| improve this answer | |
  • To be more clear so - Im using a Desktop computer, its very resilient. I have never had any problems with it. Power failures are very rare here. - Bios is running fine, I can boot to Restor Mode in Ubuntu - I ran fsck and all disks came back ok, I have one disk. I have a backup program running normally, backintime, for importatnt documents etc. - – Dylan Nov 24 '15 at 14:47
  • How can I boot Kubuntu normally - ie. get out of emergency mode? – Dylan Nov 24 '15 at 14:52
  • What do you mean by emergency mode? – Oli Nov 24 '15 at 15:01
  • What I mean by recover is...go back to normal...without the emergency mode.. :) – Dylan Nov 24 '15 at 15:04
  • "Emergency mode" screen appears after I restart the computer. There are several options listed here. I have tried them all and they don't appear to do anything. – Dylan Nov 24 '15 at 15:06

Not the answer you're looking for? Browse other questions tagged or ask your own question.