Re: Weird random reboot -- thinkpad x220
On 30.04.2014 10:35, Zenaan Harkness wrote:
> Please bottom-post, not top-post.
> On 4/30/14, Paul Seyfert <pseyfert@mathphys.fsk.uni-heidelberg.de> wrote:
>> you're not paranoid, I've seen sudden reboots running wheezy (when it
>> was testing and i think even since it's stable) on my x220 as well.
>> though very rarely. i don't recall having seen it since September. but i
>> remember it even happened once when i was sitting in front of it.
>>
>> I'm sorry i have to date not the slightest idea how to reproduce the
>> behaviour.
>
> See below.
>
>> the time i happened to see it, it looked like the power went out (with
>> PSU connected and battery fully charged). after about a second in which
>> i wondered what was going on, the computer booted as if it was switched
>> off and somebody pressed the power button.
>
> I run sid, and have reproduced this when x220 is connected to power/
> "battery slice" which is like a docking station, but it's just a
> battery.
>
> When connecting power to the slice (recommended, apparently when slice
> is connected, should not connect power to laptop (which has its own
> power connector of course) but to slice power connector.
>
> This causes instant reboot for me.
>
hm, i use various combinations.
* 9 cell
* 9 cell + PSU
* 9 cell + docking station + PSU connected to notebook
* 9 cell + docking station + PSU connected to docking station
* 9 cell + slice
* 9 cell + slice + PSU connected to slice
* 9 cell + slice + PSU connected to notebook (yes, rarely i end up in
the not-recommended setting)
it didn't occur to me that the random reboot is due to a particular
setting, none of the settings reliably triggers the reboot.
> I have not had time to check out LENOVO bios updates yet.
>
this is different for me. i had quite some problems with the very early
bios versions of the x220 when I got it. After three updates I ended up with
UEFI: 1.17 / ECP: 1.08
> This is a known problem. I haven't finished reading giyf search
> results to determine how to fix, would like to know myself of course.
>
> So x220 laptops have known power problems. Also with regular internal
> battery: battery can reach a state where the ACPI (or whatever it is)
> can no longer reliably tell you what charge state the battery is. I
> have reverted to disabling automatic shutdown and power-low
> notifications, since the battery status can change back and forth to
> eg 2hrs to go, empty, 1hr55 to go, empty etc. and each "empty" causes
> annoying pop ups.
I think this is a different problem. For the random reboot, let me
repeat that i didn't see a shutdown when i was present at the random
shutdown event. the notebook was suddenly off. like removing the battery
and unplugging the PSU. so the random reboot doesn't seem acpi related
to me.
>
> [...]
Cheers,
Paul
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