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Old 02-20-2026, 01:21 AM   #1
Chris_Snow
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Sending to Device Changes Format (Appears to Change It??)

Sending to Device Changes Format (Well it appears that way). I'm not actually sure what is going on or if this is actually the case.

I tweak all my ebooks so they look the same on my Kobo Glo using Sigil. I've done it for years. I've used Calibre for years and are very comfortable with it.

However, the last 3x ebooks I have sent to the device via Calibre have shown in the Library as Kobo Epub instead of just epub like all the other ebooks on the device. The ebooks don't look any different than any other epub.

I have not changed anything in Calibre (that I realise) or in Sigil and I have been unable to figure out why this is happening.

I send them to the device via right click in calibre -> send to main library.
Both input and output formats in calibre are epub (convert=epub2).

When the ebooks show in this format (Kobo Epub) the Kobo Glo has a different format for everything - including several new icons in the reading interface I have not seen before. It does NOT follow the tweaks I have dictated in sigil -> eg -> Line-space doesn't conform etc.

The only way I can get the device to show them as epub is to side-load them into the root of the kobo drive -> but when I do this, the comments section of the meta data doesn't show exactly what is in the comments section when looking from Calibre (I put the page count in the comments field and it doesn't show when side loaded).

Not sure if I have encountered a bug in Calibre or I've made a change without realising (old age does play havoc!) or what??

I know my Kobo Glo hasn't changed because I don't update it (or connect to the net or wifi so it can!)

Calibre = 9.3.0 (updated today to see if anything changed, but is is still doing it).

Anyone have any ideas what it could be? This has been a recent thing and I know Calibre has made some big version changes recently. Very perplexing for me.

Thanks for any insight.
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Old 02-20-2026, 02:38 AM   #2
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I suspect when the driver was fixed (something had been broken for quite a while) a while back.
Kobos have 2 viewers. 1 for EPUB and another for KEPUB.
The normal send stacks extensions xyz.kepb.epub when you send epubs
IF
The driber config has Use Kobo viewer for EPUB books ticked (on the collections, covers, uploads tab)
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Old 02-20-2026, 02:51 AM   #3
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Right click the Kobo device icon in calibre, choose configure and unset the option to use kobo viewer for epub books under the collections, covers and uploads tab
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Old 02-20-2026, 07:45 PM   #4
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Thank you for your insights.
Right click the Kobo device icon in calibre fixed it for me and now we are good to go again.
Awesome. Really appreciate the help.


On another note...

I have been a member of this forum since 2013. Why do my posts suddenly have to be admin approved before they appear?
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Old 02-20-2026, 08:30 PM   #5
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Quote:
Originally Posted by Chris_Snow View Post
Thank you for your insights.
Right click the Kobo device icon in calibre fixed it for me and now we are good to go again.
Awesome. Really appreciate the help.


On another note...

I have been a member of this forum since 2013. Why do my posts suddenly have to be admin approved before they appear?
Probably because of a longish period of inactivity.
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Old 02-20-2026, 09:11 PM   #6
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Originally Posted by theducks View Post
Probably because of a longish period of inactivity.
That could be true.

I've been lucky I have had no issues I can't figure on my own. Now I've had two in a short amount of time. There will probably be one more -> always seems to happen in threes!
Thanks
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