Re: [systemd-devel] [hybrid-sleep] hibernation delay
On Fri, 13.06.14 18:54, Tom Sherpen (tomsher...@mail.com) wrote: Hi, I am wondering if hybrid-sleep could support a hibernation delay, similar to what is found in pm-utils [1] Thus, you would be able to first suspend, with the machine going automatically into hibernation after a certain amount of time. Is support for such a hibernation delay planned for the future? This is currently not implemented. We could certainly add something like this to the systemd-sleep binary, however, I am not entirely sure how to do this reliably: if we do this in userspace, and first set up a timer that will resume the machine, then go to suspend, how do we figure out after resume whether we resumed because of this timer (and hence we should go to hibernation, immediately) or because of some user activity? Lennart -- Lennart Poettering, Red Hat ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] [hybrid-sleep] hibernation delay
On Fri, Jun 20, 2014 at 4:24 PM, Lennart Poettering lenn...@poettering.net wrote: On Fri, 13.06.14 18:54, Tom Sherpen (tomsher...@mail.com) wrote: Hi, I am wondering if hybrid-sleep could support a hibernation delay, similar to what is found in pm-utils [1] Thus, you would be able to first suspend, with the machine going automatically into hibernation after a certain amount of time. Is support for such a hibernation delay planned for the future? This is currently not implemented. We could certainly add something like this to the systemd-sleep binary, however, I am not entirely sure how to do this reliably: if we do this in userspace, and first set up a timer that will resume the machine, then go to suspend, how do we figure out after resume whether we resumed because of this timer (and hence we should go to hibernation, immediately) or because of some user activity? I think this is usually done by comparing if the clock after wakeup == (clock before wakeup + hibernation delay + ...maybe clock drift?). [In other words, ugly hack from before s2both days.] -- Mantas Mikulėnas graw...@gmail.com ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] [hybrid-sleep] hibernation delay
Am 20.06.2014 15:24 schrieb Lennart Poettering lenn...@poettering.net: how do we figure out after resume whether we resumed because of this timer (and hence we should go to hibernation, immediately) or because of some user activity? I think there's a way to get at Linux or ACPI's information about which device triggered the wakeup (LID, RTC, whatever), but I don't remember what it was. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] [hybrid-sleep] hibernation delay
On Fri, 20.06.14 15:50, Jan Alexander Steffens (jan.steff...@gmail.com) wrote: Am 20.06.2014 15:24 schrieb Lennart Poettering lenn...@poettering.net: how do we figure out after resume whether we resumed because of this timer (and hence we should go to hibernation, immediately) or because of some user activity? I think there's a way to get at Linux or ACPI's information about which device triggered the wakeup (LID, RTC, whatever), but I don't remember what it was. Well, that's not really sufficient. There can be multiple CLOCK_BOOTTIME_ALARM in place, and even if ACPI tells us that a timer caused the wakeup this wouldn't tell us which timer it was, ours, or some other timer... Lennart -- Lennart Poettering, Red Hat ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] [hybrid-sleep] hibernation delay
On Fri, 20.06.14 16:32, Mantas Mikulėnas (graw...@gmail.com) wrote: On Fri, 13.06.14 18:54, Tom Sherpen (tomsher...@mail.com) wrote: Hi, I am wondering if hybrid-sleep could support a hibernation delay, similar to what is found in pm-utils [1] Thus, you would be able to first suspend, with the machine going automatically into hibernation after a certain amount of time. Is support for such a hibernation delay planned for the future? This is currently not implemented. We could certainly add something like this to the systemd-sleep binary, however, I am not entirely sure how to do this reliably: if we do this in userspace, and first set up a timer that will resume the machine, then go to suspend, how do we figure out after resume whether we resumed because of this timer (and hence we should go to hibernation, immediately) or because of some user activity? I think this is usually done by comparing if the clock after wakeup == (clock before wakeup + hibernation delay + ...maybe clock drift?). [In other words, ugly hack from before s2both days.] So you mean that we should check if after wakeup the time is within a 5min window or so around the time we set our timer to, and if that's the case, then we assume we woke up because of this timer-hybrid-sleep thing? That sounds awfully black-magicy to me. If people happen to manually resume the machine precisely in that 5min window then the machine will immediately go to hibernation. That sounds really wrong to me. I am really not a fan of mechanisms that usually work, but sometimes don't. That's nothing I want to support. Sorry. If you can provide me with a kernel API or so that precisely tell us that one specific timerfd or so caused a resume, then I am all ears, but otherwise this is not going to happen. Sorry. If there's value in implementing something like this, then fix the kernel first, and we will make use of it. But we will not work-around lack of support from the kernel for this kind of thing. Sorry, Lennart -- Lennart Poettering, Red Hat ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] [hybrid-sleep] hibernation delay
Hi Zbyszek, Thanks for your positive response. Very appreciated! Unfortunately I cannot contribute with any coding but would definitely be able for testing such an implementation. Looking forward to someone taking up on this feature. ~ Tom Sent: Monday, June 16, 2014 at 1:47 AM From: Zbigniew Jędrzejewski-Szmek zbys...@in.waw.pl To: Tom Sherpen tomsher...@mail.com Cc: systemd-devel@lists.freedesktop.org Subject: Re: [systemd-devel] [hybrid-sleep] hibernation delay On Sat, Jun 14, 2014 at 02:35:31PM +0200, Tom Sherpen wrote: Hi, I am wondering if hybrid-sleep could support a hibernation delay, similar to what is found in pm-utils [1] Thus, you would be able to first suspend, with the machine going automatically into hibernation after a certain amount of time. Is support for such a hibernation delay planned for the future? This (i.e. hybrid mode in which suspend is entered first, and after a while, full hibernation) would be a useful feature. I don't think anyone is working on anything like this though. Zbyszek ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
Re: [systemd-devel] [hybrid-sleep] hibernation delay
On Sat, Jun 14, 2014 at 02:35:31PM +0200, Tom Sherpen wrote: Hi, I am wondering if hybrid-sleep could support a hibernation delay, similar to what is found in pm-utils [1] Thus, you would be able to first suspend, with the machine going automatically into hibernation after a certain amount of time. Is support for such a hibernation delay planned for the future? This (i.e. hybrid mode in which suspend is entered first, and after a while, full hibernation) would be a useful feature. I don't think anyone is working on anything like this though. Zbyszek ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
[systemd-devel] [hybrid-sleep] hibernation delay
Hi, I am wondering if hybrid-sleep could support a hibernation delay, similar to what is found in pm-utils [1] Thus, you would be able to first suspend, with the machine going automatically into hibernation after a certain amount of time. Is support for such a hibernation delay planned for the future? Thanks! Tom [1] http://www.webupd8.org/2012/11/how-to-use-hybrid-suspend-in-ubuntu.html ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
[systemd-devel] [hybrid-sleep] hibernation delay
Hi, I am wondering if hybrid-sleep could support a hibernation delay, similar to what is found in pm-utils [1] Thus, you would be able to first suspend, with the machine going automatically into hibernation after a certain amount of time. Is support for such a hibernation delay planned for the future? Thanks! Tom [1] http://www.webupd8.org/2012/11/how-to-use-hybrid-suspend-in-ubuntu.html ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
