[Bug 302663] New: Thumbnails are often shown empty

[Yuri]

https://bugs.kde.org/show_bug.cgi?id=302663

            Bug ID: 302663
          Severity: normal
           Version: 2.6.0
          Priority: NOR
          Assignee: [hidden email]
           Summary: Thumbnails are often shown empty
    Classification: Unclassified
                OS: FreeBSD
          Reporter: [hidden email]
          Hardware: FreeBSD Ports
            Status: UNCONFIRMED
         Component: Thumbnails
           Product: digikam

Please see the attached screenshot.
This happens after I switch to map and back or to GEO location and back.


Reproducible: Always

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[Yuri]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #1 from Yuri <[hidden email]> ---
Created attachment 72181
  --> https://bugs.kde.org/attachment.cgi?id=72181&action=edit
screenshot

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[Yuri]

https://bugs.kde.org/show_bug.cgi?id=302663

Yuri <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |major

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=302663

Gilles Caulier <[hidden email]> changed:

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                 CC|                            |[hidden email]

--- Comment #2 from Gilles Caulier <[hidden email]> ---
run kdebugdialog and turn on digiKam, kexiv2, kdcraw debug space, and run
digiKam through a console. Report here all trace printed...

Gilles Caulier

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[Yuri]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #3 from Yuri <[hidden email]> ---
Created attachment 72183
  --> https://bugs.kde.org/attachment.cgi?id=72183&action=edit
requested debug log

Attaching the console output with all requested debug spaces turned on.

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #4 from Gilles Caulier <[hidden email]> ---
There is something wrong with KDE Kio slave interface. Job are started and
broken for an obscure reason.

Thumbnail are process in a separated process trough KIO slave. This is why
thumb are empty.

Sound like a problem with KDE core, not digiKam.

Just to test, run Showfoto and open a folder with images. Look if thumb are
visible in thumbbar. Showfoto do not use kioslave...

Gilles Caulier

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[Yuri]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #5 from Yuri <[hidden email]> ---
Created attachment 72186
  --> https://bugs.kde.org/attachment.cgi?id=72186&action=edit
showfoto screenshot showing missing thumbnails

showFoto also has problem with thumbnails. See screenshot.

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[Yuri]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #6 from Yuri <[hidden email]> ---
Created attachment 72187
  --> https://bugs.kde.org/attachment.cgi?id=72187&action=edit
showfoto terminal log

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #7 from Gilles Caulier <[hidden email]> ---
This is strange because image are loaded from HDD :

showfoto(75506)/digikam (core) Digikam::DImg::load:
"/home/yuri/Pictures/TX-Nov-2012-and-NorCal/DCIM-TX-2011-11-part1/101ND300/DSC_7493.JPG"
 : JPEG file identified
showfoto(75506)/KEXIV2 KExiv2Iface::KExiv2::getImageDateTime: DateTime =>
Exif.Photo.DateTimeOriginal =>  QDateTime("Tue Nov 8 19:10:17 2011")
showfoto(75506)/digikam (core) Digikam::DImg::load:
"/home/yuri/Pictures/TX-Nov-2012-and-NorCal/DCIM-TX-2011-11-part1/101ND300/DSC_8128.JPG"
 : JPEG file identified
showfoto(75506)/KEXIV2 KExiv2Iface::KExiv2::getImageOrientation: Orientation =>
Exif.Image.Orientation =>  1
showfoto(75506)/digikam (core) Digikam::DImg::load:
"/home/yuri/Pictures/TX-Nov-2012-and-NorCal/DCIM-TX-2011-11-part1/101ND300/DSC_8127.JPG"
 : JPEG file identified
showfoto(75506)/KEXIV2 KExiv2Iface::KExiv2::getImageOrientation: Orientation =>
Exif.Image.Orientation =>  1
showfoto(75506)/digikam (core) Digikam::DImg::load:
"/home/yuri/Pictures/TX-Nov-2012-and-NorCal/DCIM-TX-2011-11-part1/101ND300/DSC_8126.JPG"
 : JPEG file identified
showfoto(75506)/KEXIV2 KExiv2Iface::KExiv2::getImageOrientation: Orientation =>
Exif.Image.Orientation =>  1
showfoto(75506)/digikam (core) Digikam::DImg::load:
"/home/yuri/Pictures/TX-Nov-2012-and-NorCal/DCIM-TX-2011-11-part1/101ND300/DSC_8125.JPG"
 : JPEG file identified
showfoto(75506)/KEXIV2 KExiv2Iface::KExiv2::getImageOrientation: Orientation =>
Exif.Image.Orientation =>  1
showfoto(75506)/digikam (core) Digikam::DImg::load:
"/home/yuri/Pictures/TX-Nov-2012-and-NorCal/DCIM-TX-2011-11-part1/101ND300/DSC_8124.JPG"
 : JPEG file identified
showfoto(75506)/KEXIV2 KExiv2Iface::KExiv2::ge

... to get thumbnail, but nothing is show...

If you run dolphin with icon view mode through a folder where images are
stored, do you see thumbnails properly ?

Gilles Caulier

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[Yuri]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #8 from Yuri <[hidden email]> ---
dolphin thumbnails (with preview on) work fine.
gwenview thumbnails also work fine.

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #9 from Gilles Caulier <[hidden email]> ---
Which libpgf you use ? Go to Help/Component Info for details.

libpgf is used to created compressed thumbnails.

Gilles Caulier

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[Yuri]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #10 from Yuri <[hidden email]> ---
LibPGF: 6.11.42 - internal library

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[Gilles Caulier-4]

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--- Comment #11 from Gilles Caulier <[hidden email]> ---
ok. it's fine.

Do you compiled digiKam yourself or do you use a pre-compiled package ?

Do you use sqlite or mysql database ?

If you remove thumbnails-digikam.db file from your database folder, and you
restart digiKam, it's fix the problem ?

Gilles Caulier

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[Yuri]

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--- Comment #12 from Yuri <[hidden email]> ---
I compiled the FreeBSD port myself.

I chose mysql database option before compiling.

Removing thumbnails-digikam.db doesn't help the problem.

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[Gilles Caulier-4]

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--- Comment #13 from Gilles Caulier <[hidden email]> ---
1 / Please switch to sqlite to see if it's a thumbs DB problem under freeBSD

2/ If it doens't help, i suspect a libpgf port problem under freeBSD. With
cmake use "-DENABLE_THUMBS_DB=off" to disable thumbnails DB and use fredesktop
rules based on PNG thumbs (less faster and huge space disk)...

Gilles Caulier

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[Yuri]

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--- Comment #14 from Yuri <[hidden email]> ---
1. switching to sqlite didn't help.

2. with cmake use "-DENABLE_THUMBS_DB=off"  thumbnails show fine.

I reported this issue to FreeBSD maintainers: [hidden email]

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[Gilles Caulier-4]

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--- Comment #15 from Gilles Caulier <[hidden email]> ---
Ok.

That i suspected about libpgf.

If you want t investigate more, look into digikam/tests, there are 3 small
command line tools to check libpgf.
One is  qtpgftest. create a small test.png image and copy it in same dir than
qtpgftest. Run this one : it will save it as pgf and look if it can load it in
reverse. It will do the same with JPG and PNG codec and print conversion time
to compare. If all is fine, you must see no error on the console and test.pgf
must be created. You can load it with showfoto so see if image is valid.

If something go wrong, there is libpgf port failure under FreeBSD. You ust
report this problem to PGF team...

Gilles Caulier

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[Martin Bříza]

https://bugs.kde.org/show_bug.cgi?id=302663

Martin Bříza <[hidden email]> changed:

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--- Comment #16 from Martin Bříza <[hidden email]> ---
There is a similar report in the Red Hat Bugzilla for Fedora 17 (Digikam 2.6.0)
on https://bugzilla.redhat.com/show_bug.cgi?id=836953 .

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[Rex Dieter]

https://bugs.kde.org/show_bug.cgi?id=302663

--- Comment #17 from Rex Dieter <[hidden email]> ---
the fedora downstream report in comment #16 seems to imply the problem is in
libgphoto2-2.4.14

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[Gilles Caulier-4]

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|major                       |normal

--- Comment #18 from Gilles Caulier <[hidden email]> ---
To Rex from comment #17 : there is no relation between libgphoto2 and digiKam
thumbnail interface...

Yuri,

Please, give use a fresh feedback to see if this entry still valid using last
digiKam 3.5.0. Thanks in advance

Gilles Caulier

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