06-14-2021, 09:21 AM | #1 |
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fails to resume intermittently
Hi!
I stil have my Kobo Glo HD (on which I tested, coded and deployed wallabako, for those who know about that project , but it's showing signs of age. The device is now about 6 years old, if my count is right, and while that's a respectable age for a computing device, I still have high hopes that I can keep using it for another 6. The problem I'm having is that it seems to have trouble returning from sleep. At first, I couldn't quite figure out what the problem was: it would just seem to hang randomly. But now I feel it just is that: when the device times out into sleep, when I reopen the lid to start reading again, nothing happens: the display is stuck into whatever it was when I last closed the lid and it doesn't resume. Tapping the power button doesn't resume from sleep either. Holding the power button turns the LED on very briefly, but then it goes off and never returns. Normally, the power button can be used to force-reboot the machine, but somehow that doesn't work: I've tried to hold the power button up to 20 seconds, no luck. Plugging in the USB cord somehow makes the machine boot again: it then starts up Nickel normally and everything looks fine. Battery says "98%" and seems to charge normally. If I unplug the USB cord, I can use the device normally until the next suspend. If I suspend by hand and return soon after, it seems to recover correctly, so it doesn't happen *all* the time. I am using koreader on that device, and I have tried to reinstall that, no luck. I also use Nickelmenu and plato, and I have done extensive hacking on the device to make various parts of wallabako work, so it could also be me that broke something, naturally. I haven't worked on wallabako for a long time now, so I doubt it's related. This feels more like a hardware / firmware issue. My question is: what should I do with this? I've fallen back on using my Onyx Boox Note Pro 2 to read ebooks right now, but that's not really convenient: the device is really big and I don't like the built-in ereader that much. (You can install koreader through android, that said, but somehow font rendering is all aliased and weird, something which I need to bring up with the koreader folks.) Alternatively, should I just get a new Kobo reader to replace this one? Are they still as hackable as they were? |
06-14-2021, 07:32 PM | #2 |
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With those symptoms and description of what you have, I think you need to do a factory reset and find out if it is a problem when nothing extra is installed. Until you do that, it is hard to know if it is the device or something you have added.
There is a possibility that it is a failing SD card. That could trigger issues when waking that you don't see when booting or normally, but, it would depend on exactly what part of the card was going bad. But, it does sound like it is crashing when trying to sleep. You say it still has whatever you were reading showing when you closed the cover. That suggests the problem is early in the sleep process or even something to do with the cover. That it sleeps OK when you use the button supports this. The wake is failing possibly because of whatever happens above. It might also depend on if you close the cover after putting it to sleep. To test some of this, I would disable the sleep when closed option. Also, holding the power button down for 20 seconds is a way to force the device off. It is useful if the device hangs and you doesn't power off normally. After that, it should turn on normally. What happens if you power off the device when it is working OK? Does it power on with the switch? |
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06-14-2021, 08:09 PM | #3 | |||
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Quote:
Quote:
Quote:
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06-14-2021, 09:38 PM | #4 | |||
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Quote:
It also can't bootstrap after a factory reset: it can't seem to connect to kobo to get updates and aborts (and suggests downloading the desktop app, ugh). Quote:
Quote:
There's something really strange. Even with the old stock sdcard, when i plug in the USB power, it works fine, but then as soon as i unplug it, the backlight goes out, and the entire machine hangs. Could this be a power issue? |
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06-14-2021, 10:59 PM | #5 | |
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Quote:
For the setup, that could be something blocking the connection to the Kobo servers. I haven't been to "Planet Ocean", so I have no idea whether they do or not. If that is the case, you will need to use a VPN or manually install the update. Of course, then you hit the problem of the device not running when disconnected from power. |
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06-15-2021, 09:52 AM | #6 | ||||
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Quote:
It's hard to tell. I'd say 10-15 minutes? Quote:
Quote:
I did try to fiddle with the battery connector once I realized that could be the problem. Couldn't find an obvious way to fix the connexion... Quote:
And now that you mention it, I wonder if that "stock sdcard" really is stock. I was surprised to see it booted in KFmon at first, i might have already have hacked the darn thing, and therefore `/etc/hosts` might be blocking kobo servers :/ This is surprising since i did try a factory reset: I would have expected that to wipe /etc/hosts... Thanks so much for the ideas, more leads to go ahead with! |
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06-15-2021, 12:24 PM | #7 |
BLAM!
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As a reminder: you can't trust the battery gauge for much of anything, really.
So, yeah, I'd concur with David, that looks like a dead/dying battery (and possibly a funky PMIC on top of that). |
06-15-2021, 02:38 PM | #8 | |
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ouch... what's the PMIC? can i replace the battery? |
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06-15-2021, 02:55 PM | #9 |
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Power Supply Controller
Yes, the battery is easy to change and it's quite easy to buy it, but I would start by replacing the SD card ... If it doesn't help, then think about replacing the battery ... I looked carefully at your post, you seem to have changed the card. The battery is easy to purchase by searching 'PR-285083' on ebay / amazon / ali Last edited by Semwize; 06-15-2021 at 03:03 PM. |
06-15-2021, 05:02 PM | #10 | |
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https://batteryclerk.ca/products/kob...-battery?ls=en it's odd because the video there says to "disconnect the battery with tool" (?) and I couldn't quite figure out how to disconnect (let alone unglue) the battery myself. the video also shows how to change the battery in a Nook, not a Kobo (!?). Is there documentation somewhere on how to do this replacement? |
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06-15-2021, 05:36 PM | #11 | |
Wizard
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For removing the battery I recommend a Plastic Putty Knife, take you time maybe heat the battery up to soften the glue.
The connector can be disconnected using a fingernail. bernie Quote:
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06-16-2021, 04:53 AM | #12 |
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06-16-2021, 08:42 AM | #13 |
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the display (eink glass substrate) is extremely fragile, the battery itself is also problematic (it's soft), and then it's glued in. it's a challenge to apply force without damaging anything. bring lots of patience.
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06-16-2021, 03:23 PM | #14 | |
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thanks for all the advice!
this is so much better to what Kobo ended up replying, which is: Quote:
Is there any e-reader that provides a more long-term support than this one-year ridiculous support program? it's even worse than phones! |
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06-16-2021, 04:33 PM | #15 |
the rook, bossing Never.
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All of them, if purchased in the EU. At least 2 years according to SOGA, or similar local laws. Apple was fined in Italy for charging for a 2nd year.
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