Hi
I have just about sorted all the problems out on my ThinkPad R31 under Ubuntu, except sleep.
When I close the lid I want it to sleep and then wake when I open it. I have been playing with the different settings and cannot it to work as I would like, so I thought I would throw it over to you guys to see if you could help.
Ive always worked on laptops and never come across this problem. Mac OSX is the fastest for coming back from sleep, you open the lid and within two or three seconds it is up and running - even on my old 10 year old G3 PowerBook it does it. Windows XP takes a bit longer and then you get faced with a log back in screen.
I find it odd that my 10 year old G3 500Mhz Mac can come back from sleep within seconds but my sons 2.2Ghz P4 laptop takes about 20 seconds to get back.
Ive run Ubuntu and various other buntu and non-bunto based distros on other hardware - x86 and PPC - and never had sleep problems like this.
I had a ThinkPad 600 and 240x about a year ago and they just worked with sleep. Open the lid and it comes back on, sometimes faced with a log back in screen but it worked.
So why can I not get this R31 to behave in a similar way? Why would a 600 and 240x have better power down support than this R31?
If I press Fn+F4 it will go to sleep, but then coming back on takes a boot (bios splash, grub etc) and then you get the log back in screen.
That is my work around at present. It is slightly faster than a full boot but still not that quick. My other option is for when the lid is shut just to blank the screen but that doesnt shut any hardware off or conserve battery life.
My PowerBook can sleep for about 5 days and then open it up and bang, its back on again. Thats what I would like for my ThinkPad. I have my laptops running 24/7, I have never turned them off, just shut the lid and open it when I need it.
So if anyone can help it would be greatly appreciated.
I must add, that this is a Ubuntu issue - or Linux issue - as XP sleeps and wakes correctly.
Regards
Simon
On 15/01/11 11:14, Simon Royal wrote:
I find it odd that my 10 year old G3 500Mhz Mac can come back from sleep within seconds but my sons 2.2Ghz P4 laptop takes about 20 seconds to get back.
I had a ThinkPad 600 and 240x about a year ago and they just worked with sleep. Open the lid and it comes back on, sometimes faced with a log back in screen but it worked.
So why can I not get this R31 to behave in a similar way? Why would a 600 and 240x have better power down support than this R31?
If I press Fn+F4 it will go to sleep, but then coming back on takes a boot (bios splash, grub etc) and then you get the log back in screen.
It sounds like you are comparing suspend and hibernate. Using Hibernate on the R31 and your Son's machine and suspend on the Mac
Suspend keeps the memory contents in the memory which remains powered with the machine in a low power state (usually shown by a pulsing power light)
Resuming from this is pretty much instant because all the machine has to do is reinitialise the hardware a bit and of it goes. The downside is there is a finite time you can remain in suspend because it still drains the battery a bit and when the battery is completely discharged the suspended state is lost.
Hibernate writes the contents of memory out to a hibernation file (or in the case of Linux just to the swap partition) and powers the machine down completely. Then on power up this gets written back into RAM from disk. This takes longer (depending on the speed of your disk and how much physical ram you have) but has the advantage that the machine is to all intents and purposes fully powered off so you can remain in this state indefinitely.
Linux supports both states, but may only support one of them on your specific hardware so you may have to experiment. The fact that you are seeing a Bios POST screen usually signifies that you are in the Hibernate state not Suspend at the moment. You can change what happens when you close the lid in the power management settings, see if there is the option to suspend rather than hibernate there and give it a go.
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Simon Royal -
Wayne Stallwood