XO screen pulses after "standby", OOM afterwards
pgf at laptop.org
pgf at laptop.org
Sun Sep 14 19:51:20 EDT 2008
> Twice with 8.2-759 my G1G1 machine has had the screen flash on and off
> coming out of a "standby" (screen off) state. The second time seemed a
> memory pressure state, I typed some memory commands at random and saved
> the output at http://wiki.laptop.org/go/User:Skierpage/out-of-memory
except for your low battery issue, i had something quite similar happen
the other day at OLPC. i couldn't figure out how to reproduce it, but
i did happen twice. it was clearly in a mode where it kind of wanted
to wake up, but then immediately went back to sleep. i describe it
this way because the second time it happened, i was eventually able to
get it to stay "awake" by very quickly hitting a key during the brief
interval that the screen was on. i recall thinking that the idle timeout
hadn't been reset by my hitting the power button, or something like
can you file a bug with what you've written here? i can add my
partial report as well.
> The pulsings happened after I left my XO disconnected from power and it
> went dead, so much so that I had to do a
> http://wiki.laptop.org/go/XO_Full_Reset. But the laptop was running
> fine before the screen went off. Both times:
> * Screen is off, but IIRC the green power light is on.
> * I press the power on button, nothing happens. So press it some more,
> also press some random keyboard keys.
> * Then the screen flashes on for less than a second, goes blank for
> about 40 seconds, flashes on, goes blank for 40 seconds... The first
> time the screen flashed at least 10 times before staying on, this time
> it flashed at least three times.
> Both times it feels as if the laptop is so sluggish that it's queued up
> my power button presses.
> The second time (as I write this) the laptop seems extremely slow
> afterwards. I started Terminal Activity and it's taken over 3 minutes
> to start. `free` reports total 235748, used 230248, free 5500.
> It's odd that both times my XO was chugging along fine before it went
> into "standby", so if it's a memory problem the laptop ran out of memory
> while I wasn't doing anything!? I think both times I had "Automatic
> power management" on, but not "Extreme power management".
> Unfortunately I couldn't find a guide what to do if your XO is
> out-of-memory! I ran `ps alx/free/ps_mem.py`, again after killing Write,
> then after restarting X and Sugar, and then after a reboot. I saved the
> results at http://wiki.laptop.org/go/User:Skierpage/out-of-memory
> If there are useful steps testers should follow when their XO goes slow
> as molasses, point me to them, I'll put it on the wiki.
> BTW, I've now upgraded to 8.2-760. olpc-upgrade was flawless!
> =S Page user:skierpage
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paul fox, pgf at laptop.org
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