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OS/2 - Technical => Hardware => Topic started by: os2monkey on 2007.11.21, 10:03:41

Title: power saver / computer sleep problems
Post by: os2monkey on 2007.11.21, 10:03:41
Hi,
I have a ibm netvista 6790 11U with ecomstation 1.2R.
I've noticed that if I leave my computer for a while and the motherboard goes into sleep mode, and then if I come back to use ECS, the system tends to freeze up and require a reboot.
Otherwise it's pretty stable - meaning if I reboot and don't allow it to "sleep" it doesn't seem to crash.
I was just wondering if anyone has experienced anything similiar and have a resolution. OR do you know how I can disable sleep mode? (meaning is it an ecs feature that I can prevent.).
I'll take a look at the cmos to see if it's a setting there.
Title: Re: power saver / computer sleep problems
Post by: os2monkey on 2007.11.21, 10:19:16
Well I believe I found how to turn the sleep mode feature off in the cmos setup, (will know for sure in 30 minutes :)..) but am am curious if anyone else has had any experience with how ecs handles sleep mode for your respective systems.
Title: Re: power saver / computer sleep problems
Post by: warpcafe on 2007.11.22, 11:06:49
Hi,

well all of the following is subject to hearsay and guessing...
I was told that there are some issues with power management on modern systems using ACPI and eCS.
What I know of is that some devices (especially network cards) don't re-initialize correctly when the system is resuming from standby, which *might* have an impact on system stability... ;-)

HTH
Thomas
Title: Re: power saver / computer sleep problems
Post by: warpcafe on 2007.11.22, 11:10:34
Hi again,

what a coincidence! I just read from the VOICE announcement of Uniaud 1.1.4 RC4...:

"Changes since 1.1.4rc3:
  Fixed loss of IRQ after suspend/resume.
  ..."

Another indication of what might go wrong with devices/drivers when resuming... :-)

Regards,
Thomas
Title: Re: power saver / computer sleep problems
Post by: RobertM on 2007.11.22, 20:29:57
Quote from: warpcafe on 2007.11.22, 11:06:49
Hi,

well all of the following is subject to hearsay and guessing...
I was told that there are some issues with power management on modern systems using ACPI and eCS.
What I know of is that some devices (especially network cards) don't re-initialize correctly when the system is resuming from standby, which *might* have an impact on system stability... ;-)

HTH
Thomas

I believe Thomas is correct... but the issue also affects non-ACPI setups in various ways. On some older IBM systems, it just simply wont let you suspend with certain "plug-in" Network Cards installed (for instance a PCMCIA card) and gives you an error message that oddly (for IBM) is very succinct and to the point telling you suspend/hibernate is not possible with network card in PCMCIA slot. On non-IBM systems, or other IBM systems, I am not sure if you get the error message or not... and I also think that the type (brand) of card installed can also affect whether it goes into (and successfully out of) hibernate/suspend (I think there are certain IBM adapters that work)...