Mac & PC won't recognize Kobo

[JSWolf]

I'm wondering what's different with the devices with issues and the devices without issues.

[DNSB]

Originally Posted by JSWolf

Has anyone with these disk I/O errors actually done a check of the Kobo to see if there are any errors? That's what I would be doing given what a disk I/O error is. The thing is, you need to figure out what the problem is and that is the first place I'd look.

Originally Posted by PeterT

I'd also suggest checking the O/S log files to see if there are any pertinent messages. On Windows this would be eventvwr

When I saw this issue when copying large amounts of data to my Kobo, nothing was recorded in the eventviewer logs that appeared to be related to the issue. I did find orphaned file chunks on the Kobo for the last file that was being copied. In my case, it turned out to be an issue with using a direct connection to a USB 3 port. Nirsoft's USBDeview was handy here when I was trying to locate the source of the error. While playing around, I received several error messages when connecting an USB device that it was unrecognized. USBDeview allowed me to remove the failed device which would show as Unknown USB Device (Device Descriptor Request Failed) before trying to mount the device again.

[anacreon]

I'm beginning to wonder whether this might be a hardware problem on the One added to a Windows 10 version 1703 problem.

I used to have occasional problems connecting my Aura One to the Surface Book. Usually disconnecting/reconnecting and/or raising a little the micro-usb plug in the One lodging, and/or trying several cables, and/or turning off/on the computer and/or the One worked, fairly quickly.

I've had problems with the Surface itself since the 1703 upgrade, increasingly, and I plan to reset it from scratch in September when my computer-savvy brother will be available - and I feel like my One connexion problem has increased a lot since then.

Just now I went through every method, and it's been a very painful connexion/disconnexion, with the PC itself and with Calibre with the usual error messages

Spoiler:

calibre, version 3.6.0
ERREUR : Erreur: Erreur pendant la communication avec le périphérique

IOError: disk I/O error

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 88, in run
File "site-packages\calibre\gui2\device.py", line 511, in _books
File "site-packages\calibre\devices\kobo\driver.py", line 1766, in books
File "site-packages\calibre\devices\kobo\driver.py", line 2736, in get_bookshelflist
File "c:\t\t\apsw-9hooel\apsw-3.13.0-r1\src\cursor.c", line 236, in resetcursor
IOError: IOError: disk I/O error

but at long last the connexion managed to go through. I'm crossing my fingers that it won't drop until I'm done managing the library.

[hellodustin]

Originally Posted by meeera

Me, H2O2.

I'm dying inside, not because of your "Me, H2O2", although hilarious. But also having problems connecting Aura H2O2 Edition 2 after updating OS X recently. My reader won't show up in devices, if it does, it causes things to unexpectedly eject or quit. Any suggestions? I haven't had anything stump me quite like this in ages, I can usually handle it.

[Mr Meanor]

Originally Posted by hellodustin

I'm dying inside, not because of your "Me, H2O2", although hilarious. But also having problems connecting Aura H2O2 Edition 2 after updating OS X recently. My reader won't show up in devices, if it does, it causes things to unexpectedly eject or quit. Any suggestions? I haven't had anything stump me quite like this in ages, I can usually handle it.

Do an SMC reset, google the procedure for your mac.

[stewacide]

I'm having this problem on multiple Kobos (connecting to MacOS). Can't find any rhyme or reason to it, but it works maybe 1/20 times at best. Super super ultra annoying.

Edit -- Messing around more, it seems an SMC reset is what's required to get it to mount (unless that's a coincidence)

[hellodustin]

Originally Posted by Mr Meanor

Do an SMC reset, google the procedure for your mac.

Cheers for that. Worked a charm!

[Mr Meanor]

Just resurrecting this thread with maybe another solution to 'no connection' from Kobo devices to MacOS high Sierra for those who are searching.
Been laid up and while enjoying my isolation was presented with two new upgraded High Sierra MBP's that where been used in the broadcast field by my co-workers but the owners also use Kobo readers and android phones,
Recently they could only get the the devices to connect very intermittently or with errors.
They had tried nvram and SMC resets and new cables as well- but no joy. Nothing showing up in the disk utility, no devices in the USB , no corrupted hidden files. This is when they started blubbing and crying so I said I would see what I could do!

Anyway long story of testing cut short..
Remove all NTFS mounting software if installed, ie: Paragon, Macfuse, Tuxera, Mounty, etc.
Stop the applications if running in the back ground then make sure every trace is gone from applications, application support and so on, then restart.

Kobo and Android (with file transfer) should both connect now, you can reinstall the NTFS mounting software again after this and try it again.

[Lady Stardust]

Originally Posted by Mr Meanor

Just resurrecting this thread with maybe another solution to 'no connection' from Kobo devices to MacOS high Sierra for those who are searching.
Been laid up and while enjoying my isolation was presented with two new upgraded High Sierra MBP's that where been used in the broadcast field by my co-workers but the owners also use Kobo readers and android phones,
Recently they could only get the the devices to connect very intermittently or with errors.
They had tried nvram and SMC resets and new cables as well- but no joy. Nothing showing up in the disk utility, no devices in the USB , no corrupted hidden files. This is when they started blubbing and crying so I said I would see what I could do!

Anyway long story of testing cut short..
Remove all NTFS mounting software if installed, ie: Paragon, Macfuse, Tuxera, Mounty, etc.
Stop the applications if running in the back ground then make sure every trace is gone from applications, application support and so on, then restart.

Kobo and Android (with file transfer) should both connect now, you can reinstall the NTFS mounting software again after this and try it again.

Is there anywhere a list to check what are NTFS mounting softwares? Nothing you mentioned is what I have.
I still have problems connecting Aura One with Mac. Sometimes it just connects, sometimes when it doesn't I restart Mac and then it sometimes connects, but sometimes it doesn't.
Tonight, the restart didn't work, SMC reset worked once (for me to install patches on Aura One). Then I disconnected, connected again, not recognised by Mac. I reset SMC again, nothing...In the end I started Calibre content server to load the books I forgot to send while connected.
This is extremely irritating, since anything else I connect to the same port (or ports), including all Kindles I have, works normally. And I have 2 original Kobo cables and several Anker cables.
I am thinking of buying Aura One 32GB addition and hoping that one will work...

[icallaci]

Originally Posted by Lady Stardust

I am thinking of buying Aura One 32GB addition and hoping that one will work...

For what it's worth, I have an Aura One 32GB which connects reliably every time. I too was experiencing major connection problems with the original Aura One as well as with the H202. I have no idea if I was just lucky this time, or if Kobo changed something, but it works for me. Good luck.

[Lady Stardust]

Originally Posted by icallaci

For what it's worth, I have an Aura One 32GB which connects reliably every time. I too was experiencing major connection problems with the original Aura One as well as with the H202. I have no idea if I was just lucky this time, or if Kobo changed something, but it works for me. Good luck.

Thanks I think I will try it then.

[JohhnyMix]

H2O V2 works flawless on W10 and latest calibre.

[bookaho!ic]

i have h20 v2 and occasionaly i opened calibre and then plugged in kobo and nothing.

yesterday tried a different usb port on my pc and connected straight away

[geek1011]

This is the issue (I reported it and can reproduce it): kobolabs/Kobo-Reader#70. It happens on macOS and linux, maybe windows. It is the source of the intermittent I/O Error issues, and is also why some USB ports stop working after using it with the kobo.

This can temporarily worked around by using a different USB port or rebooting, but it will eventually come back. Please comment on the issue if it affects you, as kobo seems to be reluctant to try to fix it (I've tried contacting them), and gtalusan (the main person in charge of the GitHub repo) is being silent.

[Lady Stardust]

Well...I just lost my often non-connectable Aura One two days back in a taxi and strangely enough for Japan, the taxi driver didn't bring it back.
Since comic edition was not restocked, I bought another one and for now it's connecting without a problem - but it has green blotches on the screen
In the meantime, comic edition became available today, so I just ordered it. Once I get it I will see how it connects.