Bug 356084

Summary:	mtp protocol is unusable in Dolphin (but works fine in Konqueror)
Product:	[Frameworks and Libraries] kio-extras	Reporter:	Jonathan Wakely <zilla>
Component:	MTP	Assignee:	Philipp Schmidt <kde-bugs>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	elvis.angelaccio, frank78ac
Priority:	NOR
Version:	18.04.3
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	Screenshot of dolphin error

Description Jonathan Wakely 2015-11-29 15:53:15 UTC

If i connect my Android phone as a media device and then use the device manager applet to "Open in File Manager" I get loads of errors in Dolphin. Navigating to sub-directories gives errors like "Could not enter folder /FP1/Internal Storage/DCIM"

If I keep retrying and eventually get it to go to the desired sub-directory and try to copy some files from the phone to my computer I get errors about the operation being reset.

Navigating to the directories and copying files using Konqueror works fine.

Reproducible: Always

Comment 1 Jonathan Wakely 2015-11-29 16:05:24 UTC

Created attachment 95805 [details]
Screenshot of dolphin error

This image shows the error I get when trying to use dolphin to copy files using MTP

This happens whether I try to copy files from dolphin to dolphin, or (as in this case) I select some files in Konqueror, right-click and choose "Copy", then in a Dolphin window showing my home dir on a local disk I right-click and choose "Paste 6 items"

Comment 2 Jonathan Wakely 2015-11-29 16:51:47 UTC

It seems as though if Dolphin is even doing anything with the MTP device then konqueror also sometimes fails to read the device correctly. If Dolphin is not used then konqueror works fine.

So maybe related to Bug 346619 ?

Comment 3 Frank Reininghaus 2015-11-29 17:28:28 UTC

Thanks for the bug report.

(In reply to Jonathan Wakely from comment #0)
> Navigating to the directories and copying files using Konqueror works fine.

This is probably because Konqueror is still kdelibs 4.x-based, and thus uses a different version of the mtp kioslave.

Comment 4 Jonathan Wakely 2015-11-29 17:41:23 UTC

http://krazyabouttechnology.blogspot.co.uk/2013/12/when-it-comes-to-mtp-dolphin-is-bitch.html suggests dolphin has been unable to do mtp since before kdef 5

Comment 5 Frank Reininghaus 2015-11-29 17:59:49 UTC

Interesting. What happens if you access the MTP device from the file dialog of KF5-based appliciations, such as KWrite?

Comment 6 Jonathan Wakely 2015-11-29 19:27:10 UTC

With kwrite the file dialog seems to be able to navigate the mtp device (a little slowly, but without errors) and also open files from the device.  There are no problems using konqueror to browse the device while also using kwrite to open a file on it.

Whereas dolphin shows me an empty directory (that is correctly shown as non-empty by kwrite and konqueror) when trying to enter a sub-dir.

Comment 7 Frank Reininghaus 2015-12-01 19:39:55 UTC

Thanks. As far as I know, Dolphin and other applications access kioslaves like kio-mtp in the same way - the accesses are wrapped by the KDirLister class from the KIO framework. I am wondering if the number of connections could make a difference.

Could you try to hide all panels in Dolphin (especially Information and Folders), make sure that there is only one view, and check if that makes a difference? The reversed test might also be interesting: In Konqueror, split the view multiple times with Shift+Ctrl+L or Shift+Ctrl+T after opening a mtp: URL. Does that affect browsing the device in on of the views?

Comment 8 Elvis Angelaccio 2018-08-16 09:41:39 UTC


*** This bug has been marked as a duplicate of bug 396527 ***