2

On a brand new Laptop, Ubuntu fails to start when on half charged battery. It otherwise works perfectly.

The symptoms are:

  1. "bios" startup screen
  2. grub menu shows for a few seconds
  3. ubuntu logo shows briefly (2 sec)
  4. laptop powers off abruptly

When restarting with plug on the wall, I see battery level is 47%. Unplugging the laptop works fine, and it will happely work on battery for a few hours...

I tried to journalctl -b-1, but I don't see any obvious problem, and I don't really know how to troubleshoot this...

Boot process goes to the point where:

[...]
mars 19 07:46:29 tibook systemd[1]: Condition check resulted in Dispatch Password Requests to Console Directory Watch being skipped.
mars 19 07:46:29 tibook systemd[1]: Started Forward Password Requests to Plymouth Directory Watch.
mars 19 07:46:29 tibook systemd[1]: Reached target Local Encrypted Volumes.
mars 19 07:46:29 tibook systemd[1]: Mounted /var/log.
mars 19 07:46:29 tibook systemd[1]: Starting Flush Journal to Persistent Storage...
mars 19 07:46:29 tibook systemd-journald[1380]: Time spent on flushing to /var/log/journal/13ef6951f0b3451c86ad31ff8146b19a is 7.516ms for 1007 entries.

I will of course give any useful information, but I don't know what to look for... (maybe ACPI ??)

Any pointer would be appreciated.

EDIT1: this does not happen everytime. I just did just boot while the battery was at 32%.

Thanks

alci
  • 5,979

1 Answers1

1

Try and reset the Power management (a feature that turns off the power or switches the system's components to a low-power state when inactive) this way:

Shutdown computer, hold down the Power button for ~30 seconds and reboot. Then retest for power off problem.

heynnema
  • 73,649