Bug 419887

Works for me with git master version.

Does dolphin Version 19.12.3 work for you?

I can confirm thumbnails/previews are not working properly over MTP in Dolphin 19.12.3 (in my case on Kubuntu 20.04).

(In reply to Nate Graham from comment #1)
> Works for me with git master version.

I just tried this on the newly released Kubuntu 20.10 (which uses Dolphin 20.08), & it still doesn't work properly. Can you confirm which version of Dolphin you're using where it works?

(In reply to Metal450 from comment #4)
> (In reply to Nate Graham from comment #1)
> > Works for me with git master version.
> 
> I just tried this on the newly released Kubuntu 20.10 (which uses Dolphin
> 20.08), & it still doesn't work properly. Can you confirm which version of
> Dolphin you're using where it works?

There are other file managers for example nautilus for GNOME has the same issue.
I think all Linux file managers do not support thumbnails in Android.
Gwenview works fine with thumbnails in Android.

I thought I had this problem too with Android 8 phone, but for me the problem was that in Dolphin's settings, 'General' -> 'Previews' -> 'Skip previews for remote files above' value (located in the bottom) was set to 'No previews'. Set it to some sane value depending on your workflow, for example 10MiB.

If 'No previews' is still the default in latest Dolphin, it definitely should be changed to some better value.

In Nautilus, checking 'Preferences' -> 'Search and Preview' -> 'Thumbnails' -> 'All files' works for me. But like in Dolphin, also check 'Smaller than' value, just in case.

(In reply to Andrey Kozlovskiy from comment #6)
> I thought I had this problem too with Android 8 phone, but for me the
> problem was that in Dolphin's settings, 'General' -> 'Previews' -> 'Skip
> previews for remote files above' value (located in the bottom) was set to
> 'No previews'. Set it to some sane value depending on your workflow, for
> example 10MiB.
> 
> If 'No previews' is still the default in latest Dolphin, it definitely
> should be changed to some better value.
> 
> In Nautilus, checking 'Preferences' -> 'Search and Preview' -> 'Thumbnails'
> -> 'All files' works for me. But like in Dolphin, also check 'Smaller than'
> value, just in case.

You're right, that fixed it!!!! Thanks so much, I was using a Windows VM every single time I had to manage photos on my phone.  Having this off by default is definitely extremely unintuitive/unexpected, but so glad there's at least a way to make it work properly :)

Ah right, this is because technically MTP counts as a remote connection.

(In reply to Andrey Kozlovskiy from comment #6)
> I thought I had this problem too with Android 8 phone, but for me the
> problem was that in Dolphin's settings, 'General' -> 'Previews' -> 'Skip
> previews for remote files above' value (located in the bottom) was set to
> 'No previews'. Set it to some sane value depending on your workflow, for
> example 10MiB.
> 
> If 'No previews' is still the default in latest Dolphin, it definitely
> should be changed to some better value.
> 
> In Nautilus, checking 'Preferences' -> 'Search and Preview' -> 'Thumbnails'
> -> 'All files' works for me. But like in Dolphin, also check 'Smaller than'
> value, just in case.

They work for me. Thank you. I am Noob.

(In reply to Andrey Kozlovskiy from comment #6)
> I thought I had this problem too with Android 8 phone, but for me the
> problem was that in Dolphin's settings, 'General' -> 'Previews' -> 'Skip
> previews for remote files above' value (located in the bottom) was set to
> 'No previews'. Set it to some sane value depending on your workflow, for
> example 10MiB.
> 
> If 'No previews' is still the default in latest Dolphin, it definitely
> should be changed to some better value.
> 
> In Nautilus, checking 'Preferences' -> 'Search and Preview' -> 'Thumbnails'
> -> 'All files' works for me. But like in Dolphin, also check 'Smaller than'
> value, just in case.