Author Topic: Laptop only wakes up from sleep / RAM the first time  (Read 641 times)

Offline dj_bridges

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Laptop only wakes up from sleep / RAM the first time
« on: January 15, 2011, 02:42:59 AM »
Hi there,

I thought that putting my laptop to sleep was a bit flakey and tried to avoid it, but have since realised that it always works perfectly the first time it goes to sleep. However the second time it goes to sleep, when I try and wake it up, nothing comes up on the screen. This seems pretty strange as something obviously changes between putting it to sleep the first time. Does anyone have any idea why this might be happening or have any suggestions to try?

I am running fully updated KDE4 with kernel 2.6.33.7-pclos5.bfs, other spec in the signature...
PCLinuxOS 2012 running KDE4 on Lenovo ThinkPad T420, Quad core Intel i5 @ 2.6GHz, 6Gb Ram, 400 Gb HDD

Offline T6

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Re: Laptop only wakes up from sleep / RAM the first time
« Reply #1 on: January 15, 2011, 09:03:10 AM »
i tried to do this once last month and happen that exactly but i didn't reported it because i only tried it that time

i don't use that function because kde4 disables my keyboard when resuming
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Offline l33tman

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Re: Laptop only wakes up from sleep / RAM the first time
« Reply #2 on: January 16, 2011, 08:33:14 AM »
Had same problem today, had to remove battery to turn off laptop!

Offline rubentje1991

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Re: Laptop only wakes up from sleep / RAM the first time
« Reply #3 on: January 16, 2011, 12:52:31 PM »
Do the SysRq keys work?

http://en.wikipedia.org/wiki/Magic_SysRq_key

So: <Alt>+<SysRq/PrintScreen> and then in sequence, without quotes, (with a few seconds in between of each): r e i s u b


and @l33tman, isn't there a power on/off switch on your laptop? (after you tested the SysRq thing)  ???

Offline dj_bridges

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Re: Laptop only wakes up from sleep / RAM the first time
« Reply #4 on: January 17, 2011, 12:07:38 AM »
Yes I can reboot the whole thing, but was rather hoping to avoid that. It does seem very strange to me that the process of going to sleep changes something to prevent it from waking up in the future.......

Any ideas what could be altered after the first sleep-wake cycle???
PCLinuxOS 2012 running KDE4 on Lenovo ThinkPad T420, Quad core Intel i5 @ 2.6GHz, 6Gb Ram, 400 Gb HDD