[SOLVED] Resume from Hibernation with bad clock (kernel opt)

[bjavotte]

I use Gentoo since 2 years now, and i've just bought a second-hand laptop, an ACER TravelMate 2303LM.
This machine supports ACPI 1.0b, both Suspend-to-RAM (S3) and Suspend-to-disk (S4) modes (specifications here:
http://linux.zamecnik.org/en/acer-tm-23 ... ifications).

Ok so i've just installed on it Gentoo 2006.1 release, and decided to patch my recent vanilla kernel 2.6.18.3 with the suspend2-2.2.9-for-2.6.18.3.patch.bz2 patch (see http://www.suspend2.net/), to have the benefit on an approved hibernation method. After having configured and patched my kernel, i installed the stable sys-power/hibernate-script package with emerge.

So i have tested the great hibernate script on my machine, to see that it can hibernate all the memory state on the disk (the default mode for the hibernate script): can see the progress bar of the hibernation process (in mode text) and that the machine is powered-off.

So i have tasted the resume process to see, when i pressed the power button, that i recover all my desktop correctly as it was, but i found a problem, that i could never solve: when the machine resume from hibernation the clock is changed and always the same: clock is 20:15, and year is 1932.

So i have invastigated on the hibernate.conf and so on, and found an Option for clock: SaveClock.
I tried this option with: yes, no and restore-only.

But at the resume time of my machine the clock come back constantly with: 20:15, and year is 1932.

I've searched, and found nothing. That is mysterious, is how can linux system halt my machine and then
restore a correct system time, but not suspend2 hibernation, and secondly nobody ever posted for the same probleme ...

Any help here ?

[pvincent]

Any help here ?

Have you ever tried powersave ?
It should simplify the way ACPI deals with hibernation.
I know there is an option related to clock stuff.
On my recent laptop, It was not needed so I did not switch this option on.
Hope it helps...

[bjavotte]

Have you ever tried powersave ?
It should simplify the way ACPI deals with hibernation.
I know there is an option related to clock stuff.
Hope it helps...

I think i'll try to emerge kpowersave soon, but i expect to have success with suspend2 method first, and to share my experience on it after. I like to encourage diversity, and i've also read that suspend2 is powerfull, and this explained my choice.

[bjavotte]

I decided in the same time to test powersave with a 2.6.18.1 kernel that i had installed previously on that machine. This kernel version is one that is not pached with swsusp2 patch. All kernel options relative to ACPI were activated.

So i now boot by default with GRUB the 2.6.18.1 kernel, set the kernel option resume=/dev/hda2
(my default linux swap partition that is 3 times larger than the total ram size for safety)
and finally emerged sys-power/powersave-0.14.0.

Now with this new experience, i can say that powersave works as well as swsuspend2 works for me, i.e i can hibernate and resume greatly, EXCEPT for that BAD CLOCK my machine wake up always the same with: "20:15 2004" (not year 1932 as i mentionned in the post before but 2004 -- that was a little mistake).

With powersave to suspend to disk, you tape the command powersave -U in the console (see man powersave)

I read this night the documentation and configuration files of the sys-power/powersave package.
I changed those ones:

SUSPEND2DISK_RESTART_SERVICES="clock"
SUSPEND2DISK_SHUTDOWN_MODE="__ALL__POSSIBLE__VALUES__TESTED"
SUSPEND2DISK_RESTORE_CLOCK="__ALL__POSSIBLE__VALUES__TESTED"
SUSPEND2DISK_SHUTDOWN_MODE="__ALL__POSSIBLE__VALUES__TESTED"

But no more result for the clock issue.

So it take my nerves because each time i want to hibernate, after i resume i have to go into the BIOS to change the date to something decent.
I think the problem comes from my ACER TravelMate 2303LM, and probably that comes from the kernel itself with this hardware ...

What to do ? : installing Kubuntu ? I'm satisfied with gentoo !!

[bjavotte]

This thread is closed now, because i solved the problem of bad clock after suspending-to-disk (S4).

So now i will be able to use S4 mode with my ACER. It's great that i finally found what was the "mistake" or misconfiguration but i had to work around to find where the problem came from ...

To solve the bad clock, i searched into the kernel options relative to clock; so this logically led me to the submenu options in
Device Drivers ---> Real Time Clock and there i had to activate:

CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE = (rtc0)
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y


Conclusion:

ACER TravelMate 2303LM works fine with ACPI S4 mode whether i use powersave method or the Software Supend 2 method. Next step will be now to have a graphic front-end install to powersave packagen that is kpowersave (for KDE). I will soon install kpowersave when an ebuild will be created for the 0.7.1 version of it. I don't think i will use Software Suspend 2 any more, since powersave seems powerfull, as i just discovered, thanks to pvincent.