Bug 425878

Summary: No thumbnails forthcoming
Product: [Applications] digikam Reporter: arne anka <kde-bugs>
Component: Import-IconViewAssignee: Digikam Developers <digikam-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: caulier.gilles, metzpinguin
Priority: NOR    
Version: 6.4.0   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed In: 7.3.0
Sentry Crash Report:

Description arne anka 2020-08-27 18:51:10 UTC 
SUMMARY

import view does not show (all) thumbnails. the vast majority of images just show the generic icon and there's no way to force an update. thumbnails exist on phone

STEPS TO REPRODUCE
1. connected my phone
2. selected PTP on phone
3. digikam -> Import -> <Phone>

OBSERVED RESULT
import view opens with only a couple of thumbnail,s and that doesn't chnage no matter how long i wait


EXPECTED RESULT
thumbnails appear
or an indicator is shown that something is still happening (generating thumbnails maybe?)
or a useful error message tells me why there are no thumbnails
or there's a button to force thumbnails regeneration/reloading

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

Operating System: Debian GNU/Linux 
KDE Plasma Version: 5.17.5
KDE Frameworks Version: 5.70.0
Qt Version: 5.14.2
Kernel Version: 5.7.0-3-amd64
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-4700MQ CPU @ 2.40GHz
Memory: 15,4 GiB of RAM

ADDITIONAL INFORMATION
Comment 1 Maik Qualmann 2020-08-27 19:14:24 UTC 
In PTP mode the thumbnail is sent / created by the connected device. On my Android phone, all thumbnails of image files are displayed. 
Which phone model do you use?

Maik
Comment 2 arne anka 2020-08-27 19:20:44 UTC 
quote from original report:
"thumbnails exist on phone"

just opened the folder with gwenview, thumbnaisl weren't ther initially but re-created by gwenview.
doesn't bother digikam, though.
still no thumbnails.
Comment 3 Maik Qualmann 2020-08-27 19:30:13 UTC 
It may be that there are thumbnails on the device. But digikam requests a thumbnail via the PTP driver, if this is not provided by the device, digiKam would have to download the entire file and create a thumbnail itself, which is exactly what Gwenview does. But it is definitely a fault of the device that it does not fully support the PTP protocol.

Maik
Comment 4 Maik Qualmann 2020-08-28 06:06:40 UTC 

*** This bug has been marked as a duplicate of bug 425746 ***
Comment 5 caulier.gilles 2021-04-04 07:34:57 UTC 
Fixed with #425746