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Thread: Zenbook crash when unplug AC power

  1. #1
    Join Date
    Apr 2011
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    33

    Exclamation Zenbook crash when unplug AC power

    So it's basically the problem in the title, when I unplug the AC power cable while computer is on, I get a sudden shutdown. It's not repeatable every time, but it is very frequently. The power plug is already pretty crappy and loose fitting, so even just bumping it can cause this crash sometimes and it is very annoying. How can I fix it? I have the UX31 running 12.04.

  2. #2
    Join Date
    Sep 2012
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    2

    Re: Zenbook crash when unplug AC power

    I've been having this same problem for a while now, probably after a kernel update to 3.2.29. I got to the point of trying a fresh install, which didn't help...

    What seemed to have done the trick is a BIOS update to version 213.
    There have been no freezing or shut downs due to unplugging or re-plugging since the BOIS update.

    Cheers.

  3. #3
    Join Date
    Sep 2012
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    2

    Re: Zenbook crash when unplug AC power

    Update - a day later the problem came back.
    To summarize it:

    Asus Zenbook UX31E
    Fresh install of Ubuntu 12.04
    kernel 3.2.0-30
    BIOS 213
    Whenever the AC is unplugged or re-plugged, the system either stops responding completely or crashes.

  4. #4
    Join Date
    Nov 2006
    Location
    Toronto, Canada
    Beans
    143
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: Zenbook crash when unplug AC power

    I'm still having this problem with Ubuntu 12.10 and BIOS version 214. Does anyone have any idea why this is happening, and/or can anyone help us debug this? Thanks!
    I must be updating Ubuntu. How else could I be expected to take seriously the phrase, "Unpacking replacement gnome"?

  5. #5
    Join Date
    Nov 2006
    Location
    Toronto, Canada
    Beans
    143
    Distro
    Ubuntu 12.10 Quantal Quetzal

    Re: Zenbook crash when unplug AC power

    I must be updating Ubuntu. How else could I be expected to take seriously the phrase, "Unpacking replacement gnome"?

  6. #6
    Join Date
    Apr 2011
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    33

    Re: Zenbook crash when unplug AC power

    wim@wim-zenbook:~$ uname -a
    Linux wim-zenbook 3.5.0-19-generic #30-Ubuntu SMP Tue Nov 13 17:48:01 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
    I'm still having this problem on quantal quetzal 12.10. Very annoying problem because the UX31 zenbook has a crappy loose power plug anyway, so you can disconnect it just by bumping it while it's on your lap, and then the whole OS crashes. Ouch!

    If anyone knows a workaround or fix, it would be greatly appreciated...

  7. #7
    Join Date
    Oct 2009
    Beans
    3

    Re: Zenbook crash when unplug AC power

    I had the same problem but it went away after I changed the kernel flags to

    quiet splash drm.vblankoffdelay=1 i915.semaphores=1 i915.powersave=1 i915.i915_enable_rc6=1 acpi_os_name='Microsoft Windows XP'

    as suggested in
    https://bugs.launchpad.net/ubuntu/+s...ux/+bug/989191

    Weirdly enough, it didn't recur even when restarted without flags or with the flags I had originally.

  8. #8
    Join Date
    May 2008
    Beans
    1

    Re: Zenbook crash when unplug AC power

    I believe this problem is not because of Ubuntu.. I have the same problem with Windows 8, as I also had with Windows 7.

    Yes it is true, the power cord is crappy..

  9. #9
    Join Date
    Apr 2011
    Beans
    33

    Re: Zenbook crash when unplug AC power

    I put those kernel flags in, sudo update-grub and restart, but it does not fix the problem for me..
    This laptop kind of sucks on Ubuntu, a shame because it's nice in many other ways

  10. #10
    Join Date
    Apr 2012
    Beans
    2

    Re: Zenbook crash when unplug AC power

    I had the same problem on my UX31. VERY annoying, as the power plug is now so loose that i need to put some a pen under it to keep it connected, so then I can't move the zenbook anywhere without unplugging and having to restart the OS.
    I tried many suggestions from this thread and others, nothing worked.

    Then I found a purely hardware and very simple solution that is (for now) working for me : DISCONNECT then RECONNECT the BATTERY.
    Though, on those netbooks, it's a bit trickier than ejecting a battery pack, it requires unscrewing the back plate, and carefully unplugging the connector without pulling on the cables.
    But then, the issue disappeared for me since yesterday !! And if it reappears, i will try to repeat this.

    I'm no expert in hardware, but I suppose that there must be a bug in the firmware of some charge processor. This bug could be triggered by some condition, ie bad recovering from sleep mode, full discharge or anything similar. And then, the only way I know to reset it, is to unplug the battery.

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