To hibernate or not to hibernate?

chrisretusn · 07-29-2019, 11:02 PM

I prefer hibernation on my laptop. Just close the lid, wait for it to finish, unplug, and put it away. When ready to start again, take it out, plug it in, turn it on, wait a few seconds and bingo back to business. I do this every day. Only time I don't is when updating Slackware and I need to reboot.

Richard Cranium · 07-29-2019, 11:08 PM

If you want great uptime stats, use hibernation.

Some systems support hybrid suspend, which does the work of hibernation but suspends the system. If you restart the laptop before it runs out of power, it is as if you merely suspended. Otherwise, the system acts as if you had hibernated.

EDIT: the command...

Code:

pm-is-supported --suspend-hybrid && echo "hybrid suspend is supported" || echo "your system doesn't support hybrid suspend"

...should tell you if it supported on your (presumably) laptop.

See https://www.maketecheasier.com/enabl...end-in-ubuntu/ which I haven't tested against Slackware as of writing this.

Lysander666 · 07-30-2019, 06:34 AM

Quote:

Originally Posted by Richard Cranium

EDIT: the command...

Code:

pm-is-supported --suspend-hybrid && echo "hybrid suspend is supported" || echo "your system doesn't support hybrid suspend"

...should tell you if it supported on your (presumably) laptop.

See https://www.maketecheasier.com/enabl...end-in-ubuntu/ which I haven't tested against Slackware as of writing this.

I get:

Quote:

hybrid suspend is supported

Will look into this. Thanks, Richard.

Quote:

Originally Posted by Richard Cranium

If you want great uptime stats, use hibernation.

It's tempting. Sad but true.

My swap partition is 4GB, which is apparently a little low for my 4GB of RAM, but it works fine with hibernate.

Richard Cranium · 07-30-2019, 11:55 AM

I tested hybrid-suspend on my old HP-635 (which believes that hybrid suspend is supported, according to the code snippet), but I didn't see the laptop hibernate after 15 minutes. I'll admit that I didn't restart after following the instructions at the link I gave, but the instructions there didn't say that you needed to do so. I also wasn't running on battery power during the test, so that might be a factor as well.

Or the instructions at the link simply don't do the right thing.

Richard Cranium · 07-31-2019, 11:01 PM

Hmm. xfce4-session-4.13.1 (if you are using XFCE) supports hybrid suspend in that you can actually select it. Dunno about KDE4.

The command pm-suspend-hybrid has been around for a loooong time, but that requires using the command line to kick it off.

Lysander666 · 08-01-2019, 03:23 AM

Quote:

Originally Posted by Richard Cranium

The command pm-suspend-hybrid has been around for a loooong time, but that requires using the command line to kick it off.

And root, maybe. But that's no issue really, I'll try this out later today. One can always execute a script to lock the x session before hibernating so the machine is protected on wake up. But this is not needed if LILO is password-protected.

Richard Cranium · 08-02-2019, 12:18 AM

Quote:

Originally Posted by Richard Cranium

I tested hybrid-suspend on my old HP-635 (which believes that hybrid suspend is supported, according to the code snippet), but I didn't see the laptop hibernate after 15 minutes. I'll admit that I didn't restart after following the instructions at the link I gave, but the instructions there didn't say that you needed to do so. I also wasn't running on battery power during the test, so that might be a factor as well.

Or the instructions at the link simply don't do the right thing.

So, running under battery power appeared to do the right thing.

I opened various windows (terminal and firefox), unplugged the laptop, closed the lid, and walked away.

After a day, I plugged the laptop back into power (it's at 6% as I type this) and hit the power button. On restart, I got the environment that I had when I closed the lid.

2disbetter · 06-09-2020, 03:01 AM

As someone who had to claw their way to a working hibernation function, I'm always surprised that people don't really understand what hibernation is for. Being able to return to a workflow and not setup everything as you would from a cold boot, is a time saver. It is suspend without the power drain.

I'm using a partition for mine, but I wonder if anyone could point me to using a swap file instead? I'd prefer that myself.

chrisretusn · 06-09-2020, 06:49 AM

Never mind, misread post. Swp file