Another suspend-to-RAM problem

coldsalmon · 08-29-2005, 11:22 PM

Hi,

I'm running Kubuntu on my Averatec 3715-EH1 notebook, and am having a problem resuming after suspend-to-ram. Suspend-to-HDD works fine. It appears that I can suspend fine, but when I try to resume, I get a blank screen, and the HDD light stays lit constantly, though I can't hear any activity. Keystrokes get no response. This happens whether I try to resume by touching the keyboard, pressing the power button, or opening the lid. I am forced to reboot. I don't know my graphics card offhand, but will look for the information. The processor is an AMD Sempron 3000+.

Thanks for your help,

--C

SlackerLX · 08-29-2005, 11:52 PM

It means that sleep (suspend to RAM) is not supported on your hardware! Only hibernate (suspend to Disk)

coldsalmon · 08-30-2005, 12:10 AM

It works in Windows, so it must be supported by the hardware.

SlackerLX · 08-30-2005, 12:32 AM

not necessarily! M$ emulates sleep

coldsalmon · 08-30-2005, 02:05 AM

Any way I could "emulate sleep" in Linux?

SlackerLX · 08-30-2005, 04:35 AM

have you read about suspend to RAM? It's not healthy for computer. Use Hibernate

theYinYeti · 08-30-2005, 04:39 AM

Quote:

Originally posted by SlackerLX [suspend to RAM is] not healthy for computer

May I have some pointers? I'd like to learn more about this issue.

SlackerLX · 08-30-2005, 04:45 AM

http://wiki.linuxquestions.org/wiki/ACPI
and Google it

jspaar · 08-30-2005, 12:51 PM

Quote:

Originally posted by SlackerLX
http://wiki.linuxquestions.org/wiki/ACPI
and Google it

Suspend-to-RAM is unhealthy for the computer? Please back that up with an URL that actually talks about it.

coldsalmon · 08-30-2005, 11:31 PM

Yes, why is suspend-to-RAM unhealthy?

SlackerLX · 08-31-2005, 10:36 AM

Laptop after suspend to RAM locks up and damages RAM. From personal experience: I burnt RAM on my Laptop

Good that it was still on warranty.

TFMegatron · 09-02-2005, 10:50 AM

Quote:

Suspend-to-RAM is unhealthy for the computer? Please back that up with an URL that actually talks about it.

http://acpi.sourceforge.net/documentation/sleep.html

jspaar · 09-02-2005, 01:05 PM

Thanks Megatron,
ACPI4Linux is a very credible source IMO, but the worst it says about suspend-to-RAM is this:

Quote:

Because it requires a high degree of coordination between the cpu, chipset, devices, OS, BIOS, and OS device drivers, this system state is the most prone to errors and instability.
Pavel Machek has created a small document with some hints how to solve problems with S3.

That sounds to me like it either works or tends to crash on any given system. Nothing about ruining your hardware right?

TFMegatron · 09-02-2005, 02:05 PM

I did some light searching and could not validate that acpi s3 damages hardware.

jspaar · 09-02-2005, 07:13 PM

About the closest I can find is that on some laptops, ACPI under Linux doesn't turn on the fans, resulting in overheating. That would be unhealthy. But it isn't only a sleep-mode problem, AFAIK.

One examle: http://www.psychosis.net/evo-linux/ under "Power Management".

For now I'm going with the idea that if your fans work OK under ACPI, sleep mode is safe to use.