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Old 07-08-2018, 06:18 AM   #1
GeorgK
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Kobo Aura HD / Calibre / Windows 7 - Plese Help!

I am using Calibre together with my Kobo Aura HD for many years on my Win7 PC. Hard and software of this PC are unaltered since years.
I never experienced any trouble with Kobo, Calibre and Windows working together.
A few weeks ago I sideloaded (as always) the latest firmware version for my Reader (FW 4.8.11073). It may be by chance but since then my PC crashes, when I connect the Kobo with the PC unseen what USB port is used.
Connecting it to another PC works fine.

Any idea what I should do to get my PC and my Kobo working together again?

Regards
Georg
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Old 07-08-2018, 12:15 PM   #2
ReaLx3m
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Quote:
Originally Posted by GeorgK View Post
I am using Calibre together with my Kobo Aura HD for many years on my Win7 PC. Hard and software of this PC are unaltered since years.
I never experienced any trouble with Kobo, Calibre and Windows working together.
A few weeks ago I sideloaded (as always) the latest firmware version for my Reader (FW 4.8.11073). It may be by chance but since then my PC crashes, when I connect the Kobo with the PC unseen what USB port is used.
Connecting it to another PC works fine.

Any idea what I should do to get my PC and my Kobo working together again?

Regards
Georg
Easiest would be to first try a different cable, it could have developed a break and its shorting the usb port.
If that doesnt work, then roll back to the previous firmware you had and see if the behavior persists so you know for sure if its the firmware's fault(which i doubt, but who knows)
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Old 07-08-2018, 03:48 PM   #3
rcentros
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Any idea what I should do to get my PC and my Kobo working together again?
I'm guessing your PC has USB ports on the front and back. I've found that (sometimes) when a device isn't recognized on the front USB ports, it will be recognized when plugged into the back USB ports (which are connected directly to the motherboard.) I'm guessing a slight difference in voltage could be all it takes. (It seems like Kobos are a little touchier about this then other Readers.)
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Old 07-09-2018, 05:46 AM   #4
GeorgK
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I'm guessing your PC has USB ports on the front and back. I've found that (sometimes) when a device isn't recognized on the front USB ports, it will be recognized when plugged into the back USB ports
Well, at least sometimes it has been detected when changing to another port.
After a few tries it now crashes on every port.

Of course I did change the cable first.

Thx for your hints
Georg
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Old 07-09-2018, 06:52 AM   #5
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Well, at least sometimes it has been detected when changing to another port.
After a few tries it now crashes on every port.
Sorry to hear that. As suggested in another thread, possibly getting a powered USB hub would help. But I don't know why new firmware would require more power than older firmware, so there may be (probably is) something else at work here.
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Old 07-13-2018, 02:33 AM   #6
GeorgK
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... possibly getting a powered USB hub would help...
Thank you. That will be my next try...

Regards
Georg
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Old 07-13-2018, 06:20 PM   #7
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Does this happen irrespective of whether calibre is running or not? If it happens only when calibre is running, make sure it's updated to the latest version. I was quite a ways behind on updates when I first got my Kobo and calibre wouldn't recognize it until I updated.

If it's failing on connection every time then it's probably a hardware problem. Are other USB devices recognized? One thing I might suggest is using a different OS (live CD or vm) and see if it fails there as well. That would indicate a software/config problem with your OS and not your hardware.
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