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Hi!
Today i finally tried out (only for curiosity) hybrid-sleep, and i discovered it is not working.
I'm not using testing repo. So, systemd 196 should be able to hybrid-sleep.
First problem: i need to put my password to hybrid-sleep, while for suspend and hibernate that is not necessary.
Second problem: as far as i understand, hybrid-sleep should be a normal suspend, but in background the netbook should suspend to disk too, in event of lack of energy. Is this correct? Well, on my netbook, it only hibernates, as if i did a "systemctl hibernate".
journalctl
dic 02 18:48:33 arch systemd-sleep[4421]: Hibernating and suspending system...
dic 02 18:49:09 arch systemd-sleep[4421]: System thawed.
But it is not "hibernating and suspending", it is only hibernated.
By the way, i'm not using pm-utils.
Any hint?
Thanks!
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I can reproduce this behaviour with systemd-196-2. systemctl hybrid-sleep just hibernates and powers off. Further investigation of this issue brought the following issues:
systemctl suspend works as expected.
systemctl hibernate works also.
Disabling hibernation (by disabling the swap and resume partition) leads to suspend to ram with the hybrid-sleep command.
Circumventing systemd does the job and correctly hibernates AND suspends:
echo suspend > /sys/power/disk; echo disk > /sys/power/state
So I guess the kernel part of hybrid-sleep and the hardware work correctly and somehow the systemd-hybrid-sleep.service does not work. The service file has the line:
ExecStart=/usr/lib/systemd/systemd-sleep hybrid-sleep
which seems to be the relevant command.
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systemctl suspend/hibernate works here too.
Everything seems ok...but hybrid-sleep won't work.
I guess there could be a problem in the /usr/lib/systemd/systemd-sleep command. And then this is an upstream bug. But two users reporting it are too few. We need more feedbacks!
EDIT: another thing: i can suspend/hibernate as normal user, but i need to launch hybrid-sleep by root user. Don't understand why.
EDIT2: without using TOI to hibernate, with the in-kernel hibernate function, it seems to magically work! You made no references to TOI, so i guess you're not using it, are you? Check it.
Last edited by nierro (2012-12-16 22:13:01)
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For the first "EDIT" problem, i asked on systemd-devel ml, and yesterday appeared a patch to fix that. So that problem should be gone as systemd 197 is released.
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EDIT2: without using TOI to hibernate, with the in-kernel hibernate function, it seems to magically work! You made no references to TOI, so i guess you're not using it, are you? Check it.
I guess you mean TuxOnIce? No I don't use it.
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I tested it on another piece of hardware (a HP dc7900 workstation) and systemd hybrid-sleep works as expected.
As I don't have the laptop (where systemd hybrid-sleep does not work, only hibernates) with me, the following difference wrt installed packages comes to my mind:
This workstation does not have laptop-mode-tools installed, but the laptop has it. I will remove laptop-mode-tools tomorrow to see if it makes any difference...
EDIT: Testing it the other way round, installing and enabling laptop-mode-tools and acpid on the workstation makes no difference. systemd hybrid-sleep still works. Hm.
Last edited by demaio (2012-12-18 11:06:07)
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Uhm, yes i meant TuxOnIce.
By the way, it sounds quite strange to me that laptop-mode-tools won't let your system hybrid-sleep, but you should try disabling it.
Let us know!
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I narrowed down the problem a little bit:
It does not matter which computer I use. It just matters if I have the machine running on battery or on mains adapter. So there are two situations left:
When running on battery (ca. 90% charged): systemctl hybrid-sleep hibernates and powers off (no suspend)
When running on mains: systemctl hybrid-sleep hibernates and suspends correctly. If I power on with mains still connected, the computer resumes from RAM. If I disconnect the power, it resumes from hibernation. Everything ok.
Now I have no clue where to look further for debugging this issue.
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I guess you should tell on systemd ml that problem, you'll probably get better help.
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