Forma How can speed up the process from off to "reading a book"

[NiLuJe]

There might be some sneaky rtc wakeups involved to honor syncs (to a certain extent) when those are enabled.

God knows Kindles like to do unspeakable crap behind your back when they're "asleep" .

(But, yeah, the point still stands: don't poweroff an eReader unless you intend to shelve it for at least a couple weeks).

[ilovejedd]

Originally Posted by Frenzie

It's not like those things are on while sleeping. :P

My PW4’s jailbroken, still on older firmware and has two update blockers setup.

Without the second update blocker, battery was draining at 1-2% per hour while it’s supposed to be on sleep mode if I forget to enable airplane mode.

[Frenzie]

Originally Posted by ilovejedd

Without the second update blocker, battery was draining at 1-2% per hour while it’s supposed to be on sleep mode if I forget to enable airplane mode.

I see, so you're saying it'll never actually go to sleep at all if you don't turn off wifi manually first.

Yeah, in plain low-energy (non-sleep) mode with wifi a device wouldn't last more than a few days. Possibly up to a few weeks without wifi. But in sleep it'll do months.

Edit:

Originally Posted by NiLuJe

sneaky rtc wakeups

Would be nice if Kobo had rtc wakeups so it could auto-shutdown after a few days.

[ilovejedd]

Originally Posted by Frenzie

I see, so you're saying it'll never actually go to sleep at all if you don't turn off wifi manually first.

Yeah, in plain low-energy (non-sleep) mode with wifi a device wouldn't last more than a few days. Possibly up to a few weeks without wifi. But in sleep it'll do months.

Mind, it was a weird quirk with the update blocking folder "update.bin.tmp.partial".

Normal behavior should be to turn off wifi radio during sleep (maybe just turning it on occasionally to sync as NiLuJe mentioned). However, the PW4 wasn't doing that for some reason (at least back then, I didn't know what the reason was).

[droopy]

Originally Posted by PeterT

The Gui will only display the standard values. Set it in the conf file and see what happens after 4 hours

It didn't work. In other words, it's powered off after 1 hour and before 4 hours

[DNSB]

Originally Posted by Frenzie

It's not like those things are on while sleeping. :P

Kobo's ereaders have an auto-sync setting which will wake the device up to synchronize when scheduled (*). After the sync finishes, it will go back to sleep but it does take a noticeable amount of power especially if no known WiFi network is available. Check under Syncing and updates in settings to see the settings.

* Scheduled is a rather loose term for Night, Morning, Afternoon and Evening.

[Frenzie]

The turn of phrase "Background sync" definitely doesn't imply that to me. In fact I might well be slightly upset to learn that my device was wasting battery daily for a sync that's seemingly only supposed to happen in the background while I was using it.

Is this something that indeed happens on all Kobos? See here what I found during a brief investigation.

[davidfor]

Originally Posted by Frenzie

The turn of phrase "Background sync" definitely doesn't imply that to me. In fact I might well be slightly upset to learn that my device was wasting battery daily for a sync that's seemingly only supposed to happen in the background while I was using it.

Is this something that indeed happens on all Kobos? See here what I found during a brief investigation.

The label is bad. But, it is a once a day full sync with Kobo servers. You can set a rough time period for it to happen. And you can turn it off. If it is enabled, and the device is sleeping when the sync is due, the device will wake and do the sync. This has been in the firmware for years.

[Frenzie]

Originally Posted by davidfor

This has been in the firmware for years.

And indeed, when searching online for the next obvious alternative (ioctl RTC_WKALM_SET), what should be the result but a Nickel strace… by me? (See here.)

Now that should be easy to replicate.

Edit: although on second thought, rtcwake is just a frontend to ioctl calls so there would have to be some special magic involved.

Edit 2: but of course it's a fake busybox implementation instead of the real thing. It could just be spewing some nonsense.

Edit 3: nope, real rtcwake says the same thing.

[compurandom]

Originally Posted by DNSB

Not as far as I know. The last time I looked, the counter used 8 bits in minutes so 1 to 255 minutes (0 says never, BTW).

I think you can edit the config file and put in a number directly.
However, first time you view the settings page, it resets it if it is out of the range the UI supports.

Since the UI doesn't support the larger values, if they are going to add a feature for this, they could make it logrithmic for values over what the current UI supports to get days / weeks...

[petercreasey]

I always have concerns, rightly or wrongly, about the possibility of the ON/OFF switches of devices like ereaders to wear out and quit working. And as others have said here, there is no reason really to turn off the ereader due to a concern about battery drain.

Thus, I just let my ereaders go to sleep automatically.

[JSWolf]

droopy, I have tried the "turn it off" method and it actually used more power then just using sleep mode. So forget turning it off and just let it sleep.

[JSWolf]

Originally Posted by DNSB

Check the kobopatcher thread. I think the relevant patch is in the libnickel.so.1.0.0.yaml file. The maximum shown is 240 to match with being able to fit the description string of "4 hours" into available space but you could replace 240 with 255 if desired.

To me, that is really useless at 240 or 255. Sony did it right at 2 days of no use before the Reader would shut off.

[droopy]

Originally Posted by DNSB

Check the kobopatcher thread. I think the relevant patch is in the libnickel.so.1.0.0.yaml file. The maximum shown is 240 to match with being able to fit the description string of "4 hours" into available space but you could replace 240 with 255 if desired.

I have patched my kobo following the instructions on geek1011's thread. I now have "Automatically power off after" ... "4 hours". Four hours isn't my desired 24 hours, but it's better than the one hour I had before.

[droopy]

Originally Posted by JSWolf

droopy, I have tried the "turn it off" method and it actually used more power then just using sleep mode. So forget turning it off and just let it sleep.

How were you able to test the power usage? Do you have an electrometer?