Hi Guys, On Apr 30, 2014 at 12:27, Zenaan Harkness <zen@freedbms.net> wrote: > On 4/30/14, Paul Seyfert <pseyfert@mathphys.fsk.uni-heidelberg.de> wrote: > > On 30.04.2014 10:35, Zenaan Harkness wrote: > >> 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 > > Thanks for the reference. I shall look into this at some point. Just bought a used x220, pretty happy to have it. Haven't looked into BIOS updates yet too. Thanks for the hint. > >> 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. > > If you had a power brownout whilst you were away, then your random > reboot _may_ have been similar to mine - that was my suggestion. I do > not know of course. > > Mine reboot can be triggered by: > a) 9-cell+slice, PSU disconnected, laptop started (even at console) > b) connect PSU to slice, witness instant reboot > > Either way, it appears there are various battery issues, of one form > or another, with x220 laptop. > > Good luck > Zenaan Firstly thanks for pointing on possible ideas why reboot could happen. Initially I've thought more to software issue side, but not the hardware. Honestly this upsetting a bit, so nice laptop nowadays, not much could be comparable to it, in design and comfort also. I see you guys seen reboots more often then me obviously using it more. Will monitor the situation. Ivan.
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