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#2521 |
Wizard
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Location: The Heart of Texas
Device: Boox Note2, AuraHD, PDA,
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This problem has some twists and turns that make it hard to pin down what is really happening. One odd result came from some of Tshering's testing; it appears that the suspend can work for a time with normal very low self discharge, and all functions suspended - then at some point, for no established reason, it wakes up or at least partially wakes and excessively drains the battery. His testing was with overnight suspends. I now look at it as suspend is only for relatively short periods, like cleaning the screen or getting something to drink. I poweroff when not reading for any more extended period of time.
Luck; Ken |
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#2522 | |
Wizard
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Join Date: Oct 2014
Location: Antwerp
Device: Kobo Aura H2O
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@Alan_S
Well, you'd have to define "drained". If I leave my device suspended for a week it'll discharge at least a few percent, but that's to be expected. But if you mean e.g. 10% in a night then that means the device didn't actually suspend at all (which is unrelated to whatever message may be drawn on the screen prior to attempting to suspend). Quote:
* And not log-file based, reading a few thousand pages with overnight suspends etc. over the past month depleted my H2O's battery from a claimed 90% or so to a claimed 47%. I consider that acceptable and not subjectively significantly better or worse than what I got out of Nickel. |
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#2523 | ||
Zealot
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Join Date: Aug 2015
Location: Athens, Greece
Device: Kobo Aura 6'', Kobo Aura H2O, Kobo Glo HD
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Quote:
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I try both solutions with no success... ![]() First I was change the values of the default.lua with something beyond of 25 in DCREREADER_CONFIG_DARKER_FONT_GAMMA = 25 : Code:
-- crereader font gamma DCREREADER_CONFIG_LIGHTER_FONT_GAMMA = 10 DCREREADER_CONFIG_DEFAULT_FONT_GAMMA = 15 DCREREADER_CONFIG_DARKER_FONT_GAMMA = 25 Second, I leave the default.lua as it is and then I change the the hinting mode to 1 in koreader/data/cr3.ini and leave the CRe do its things. I use some sideloaded fonts and experiment with these with no effect at all... Anyway, I can live with that... ![]() Think I will try the manual way and I'll change the hinting on my fonts instead, but I don't know how I can do something like this. I'm very confusing with FontForge and it's autohinting options, or I'll seek the "semibold" approach (if I can do something like this, either...) ![]() |
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#2524 | |
Wizard
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Join Date: Dec 2009
Location: The Heart of Texas
Device: Boox Note2, AuraHD, PDA,
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Quote:
Luck; Ken |
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#2525 | ||
Evangelist
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Join Date: Aug 2007
Location: Sisak, Croatia
Device: Kobo Aura H2O, Kobo Aura ONE
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Quote:
Quote:
I usually read in one block of time per day. With, if ever, short pauses (till one hour, usually) within that block. After that, reader is suspended (now shut down) till next day, or in some cases it can wait few days. Then I again read in one block. Reading time of course depends, but let's say it's 2-3 hours. Battery readings for older version of koreader (before this change in suspend script and before I started shutting it off) didn't changed while I was reading, or very, very rarely. Between days it changed 3-5%, but it also depends, there were times with 7-8%. Now, with shutting it down, it usually changes 1-3%, but basically on lower side of change. And sometimes it can be the same. Also, I sometimes notice even a bit strange thing of having more battery, but it may be just my imagination, or lack of memory what battery status really was. I just ignore it, it's not that important. Also, at least for my H2O, lower part of battery readings (under 50%) drains faster, which isn't anything alarming, battery reading doesn't have to be linear, so I don't worry about this. One time when I was putting device in standby it completely drained itself from about 20% or somewhere in that part. I thought I would have at least hour of reading time and didn't put device to charge itself, but when I tried to read, it didn't started. So, this was one time when battery drained in less than day. After that incident I started charging device when battery is under 50%, just to be on safe side and can read. Also, after that I started shutting device off and stopped trusting standby for longer periods of time. As I said, this all is for older versions of koreader, now I would need to start use suspend if my version (2015-11-3 stable) has suspend tweaked. |
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#2526 | ||
Wizard
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Join Date: Oct 2014
Location: Antwerp
Device: Kobo Aura H2O
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Quote:
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#2527 |
Evangelist
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Device: Kobo Aura H2O, Kobo Aura ONE
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Maybe it is bad battery reading from devices firmware, I surely noticed that lower battery percentage drains faster than higher, so it really maybe isn't koreader's problem. That's why I charge it sooner.
And I see that stable version has this two second change in suspend script. Will see if it helps. Also, it would be good if someone can confirm that CoolReader suspend script works better for them, just in case. |
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#2528 | |
Zealot
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Join Date: Aug 2015
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Device: Kobo Aura 6'', Kobo Aura H2O, Kobo Glo HD
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Quote:
The only problem is that font family cannot display my native language letters. BTW, is a excellent choice for reading English novels that I have sideloaded on my reader. Thanks, Ken! ![]() |
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#2529 |
Wizard
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Here is a listing of Greek Fonts that might be worth looking into. There might be a semibold there.
You also might want to check on what "fall back fonts" are in effect. Luck; Ken Last edited by Ken Maltby; 12-03-2015 at 04:22 PM. |
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#2530 | |
Zealot
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Quote:
The link is bookmarked already! I saw a few nice fonts to experiment with. One more thought. Is there any change to add someone any time schedule suspend (or, even better, shutdown) in future versions of Koreader? I was very tired last night and I fall asleep reading only one page of my book and the battery level was 39%... Wake up after 6 hours, the same page is waiting for me to read -at least- a few more words and the battery level was 24%... (the frontlight was off). The same incident occurs when I'm reading paper books and I'm very tired! Thankfully, I wont seek the reader on the floor, under the bed the next morning... -yet....! ![]() |
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#2531 |
Wizard
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Cronx has suggested that, since the Kobos power management is not offered up as an OS function (it is actually handled by separate calls to an I2C bus, as I understand it.) A power management function would need to be added to the KOReader startup before KOReader actually starts. Not sure if anyone is working on that now.
Luck; Ken |
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#2532 |
Evangelist
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Still a bit more on suspend script
As I found out that latest koreader has a bit different suspend script, I started testing suspending device.
And first day of testing had a bit of "luck" with it. After suspending reader with 100%, next day it was on 82%. This means that latest suspend script (with added two seconds) doesn't do the trick. Conditions were: -I read pdf file -I used light for reading -I have magnetic cover that was closed after I suspended device with power button (and I would love to have option to turn off magnetic cover having any effect on koreader) -I don't use book cover as suspended screen. As I had light turned on, I would saw if device exited suspend normally even under cover. It seems that something irregular happens that makes battery drain, as device wasn't waked up in a way that would trigger light. Now I'm testing suspending with CoolReader suspend script and see what happens. EDIT: I didn't closed magnetic cover at all after suspending device next time, it didn't affect battery percentage. It doesn't mean that there's correlation for sure, but it might be some problems with using magnetic cover... Last edited by Alan_S; 12-04-2015 at 09:12 PM. |
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#2533 | |
Wizard
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Quote:
Luck; Ken |
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#2534 |
Evangelist
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In my experience Ken is correct that however you suspend in Koreader, because it has no override of the magnetic cover function that function is always active if one is using a magnetic cover.
My testing to date has shown me 3 things on my 2 readers: 1. Koreader has a significantly higher battery drain in suspend mode than nickel or Coolreader. 2. Using the Coolreader suspend script made no improvement on my readers. 3. Having a magnetic cover seems to lead to even higher drain + the reader seems prone to waking up with movement when the cover is closed. I have wondered whether the fact that the magnet recognition is always 'On' in Koreader might be a factor in its higher battery drain (whether using a sleepcover or not), but that is pure conjecture. |
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#2535 |
Wizard
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Someone might try the fix in these posts https://www.mobileread.com/forums/sho...postcount=2479
https://www.mobileread.com/forums/sho...postcount=2480 https://www.mobileread.com/forums/sho...postcount=2481 (If you click on the "Thread:" shown in the top right on the single post display, you will go to the thread and be at that post's position.) If it works, someone might be motivated to make the PR at Github. I don't expect that this would fix the whole power draining issue, but it might make things more predictable. Luck; Ken Last edited by Ken Maltby; 12-05-2015 at 12:04 PM. |
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