5

I have a ubuntu 18.04 system on an Asus ZenBook laptop. I am facing the issue that my laptop keeps on restarting again and again. It started an hour ago. I have tried shutting down once but problem is still there after shutting down and booting the system.

It doesn't seem a battery problem as I got my battery changed a month ago so it'll be good to presume that battery is doing fine. Right now I am actually working in recovery mode and (till now) doesn't seem that the problem occurs (repeated automatic restarting) in recovery mode.

Also a maybe related issue could be that few days ago I left my system on overnight and it got turned off due to zero battery. Since then everytime I restart/boot my system it shows wrong time (the time battery drained or sometime before that even (probably last reboot before that battery drainage))

Also this screen comes up when the system reboots.

How to resolve this issue??

EDIT1

As asked in the question output of var/log/syslog

Sep 16 19:05:31 ZenBook systemd-timesyncd[577]: Timed out waiting for reply from 91.189.94.4:123 (ntp.ubuntu.com).

Sep 16 is also the time it shows after system boots up..!!

EDIT 2

Anotger weird thing i observed is that this unwelcome restart occurs when i move the laptop (even lift it slightly) . (though it still doesn't occur in recovery mode so believe not exactly hardware ussue)

EDIT 3

Same thing is happenening when i boot from a live usb. So this probably means system/hardware fault right? Also on a live cd the fan is blowing even during grub or so!

Community
  • 1
Naman
  • 213
  • I find the phrase "I have tried shutting down once nothing happened." what do you mean? were you able to shut down? what do you mean nothing happened? – Jeff Sep 21 '18 at 18:22
  • Oh no I meant that if it was a fling and shutting down system cured the problem but it did not. I'll clarify it once! – Naman Sep 21 '18 at 18:24
  • Clarified in problem statement – Naman Sep 21 '18 at 18:27
  • How often between unwelcome restarts? Does the behavior occur if you boot from a LiveUSB? What is in your /var/log/syslog at the time of a restart? – user535733 Sep 21 '18 at 19:09
  • It has been varying, sometimes takes few minutes upto 10 max maybe sometimes even before I type password on screen. Haven't check liveCd, will try. How to check /var/log/syslog during restart?? – Naman Sep 21 '18 at 19:28
  • You note the exact time of a restart, and look for those timestamps in the log later. – user535733 Sep 21 '18 at 20:22
  • Hi @user535733 in var/log/syslog it has time 19:04/19:05 Sep 16 (which is the time on my system when the system starts), updating the question also – Naman Sep 22 '18 at 03:39
  • 1
    Since there is no logging of a software problem (cannot reach an NTP server won't cause a reboot), the problem does not seem to be Ubuntu-related. Start looking at hardware: The two most common are overheating and faulty power supply. – user535733 Sep 22 '18 at 15:41
  • @user535733 I get what you mean, can you think of some reason that would explain what it works in recovery mode?? – Naman Sep 22 '18 at 16:24
  • 1
    I can think of several, but that does not seem relevant. All your symptoms point to hardware fault of some kind. – user535733 Sep 22 '18 at 16:31
  • Oh sure, I am going to give it for repair anyways! Thanks a lot! – Naman Sep 22 '18 at 16:36

0 Answers0