[Bug 193489] New: thumbnails are flashing are not shown at all

https://bugs.kde.org/show_bug.cgi?id=193489

           Summary: thumbnails are flashing are not shown at all
           Product: digikam
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:            (using KDE 4.2.3)
OS:                Linux
Installed from:    Unlisted Binary Package

I'm testing r970868 and digikam is not usable anymore
http://www.weihergut.it/test.mpeg

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[Gilles Caulier-4]

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
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          Component|general                     |Thumbnails




--- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2009-05-21 14:37:20 ---
Not reproducible here on my computers. KDE 4.2.3, Qt 4.5.1. Mandriva 2009.1

Others feedbacks ?

Gilles Caulier

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
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            Version|unspecified                 |0.11.0-svn




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--- Comment #2 from Andi Clemens <andi clemens gmx net>  2009-05-21 14:55:52 ---
I can confirm this, too.

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--- Comment #3 from François Garnier <francois garnier gmail com>  2009-05-30 20:33:48 ---
The same problem for me.
digikam-0.10.0-6mdv2009.1.i586.rpm

it appears after few seconds and some selections with mouse. looks like
refreshing of thumbnails is very slow and blinking

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[Marcel Wiesweg]

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--- Comment #4 from Marcel Wiesweg <marcel wiesweg gmx de>  2009-05-30 22:11:04 ---
Anything special to bring it on? Does it happen with all albums? Once started,
is it persistent? Does it use CPU? Any output on the console? What happens when
scrolling, selecting an item, clicking on an item to open preview?

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--- Comment #5 from François Garnier <francois garnier gmail com>  2009-05-31 09:24:23 ---
i have made a video capture of this problem.
http://www.fgarnier.com/pub/capture-digikam.ogg

yes, it's persistant once started and concern all albums
no output on the console
it happen since a have change the location of the images folder, and a new
re-synchro of pictures. re-generation of thumbnails change nothing.

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--- Comment #6 from François Garnier <francois garnier gmail com>  2009-05-31 21:00:24 ---
I find the cause (in my case) :
- i have two users (same group) on my computer and one images folder for the
two (with rights on 775)
- if a re-create a new database in digikam and select only my pictures (owner
me) all is right
- if i select only one picture of the other user, bingo... all thumbnails are
flashing again, for the pictures i own too...

it looks like a corruption of the database

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--- Comment #7 from Markus Golser <elmargol googlemail com>  2009-06-12 13:14:01 ---
I had to delete the database and the rc file..
Everything seems to work now using svn

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--- Comment #8 from Gilles Caulier <caulier gilles gmail com>  2009-06-12 13:27:53 ---
Marcel,

It's a DB access problem ? Sqlite relevant ?

Gilles Caulier

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--- Comment #9 from Marcel Wiesweg <marcel wiesweg gmx de>  2009-06-14 15:44:19 ---
I have no idea about this one. I would suspect problems with storing created
thumbnails. Or somewhere in the cache, but it usually works well.
Let's see if it is gone with thumbnail database enabled.

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--- Comment #10 from Gilles Caulier <caulier gilles gmail com>  2009-06-19 11:53:46 ---
To all,

Please recompile and install last code of digiKam using this CMake option :

-DENABLE_THUMBS_DB=ON

.. and try again. digiKam wilml use another sqlite database to host thumbnails
cache (saved in PGF format : wavelets based). DB file is hosted at the same
directory than lead digiKam database file.

Gilles Caulier

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--- Comment #11 from Markus Golser <elmargol googlemail com>  2009-06-19 12:04:23 ---
sorry I don't have the database anymore

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--- Comment #12 from Gilles Caulier <caulier gilles gmail com>  2009-06-19 12:26:32 ---
Markus,

You must use current code from svn (next 1.0.0-beta2)

Gilles Caulier

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                 CC|                            |opersonlig_postadress@hotma
                   |                            |il.com




--- Comment #13 from Daniel Larsson <opersonlig_postadress hotmail com>  2009-06-26 15:23:06 ---
I alsoe get this behavior when opening folders. Never thought much about it as
it settles after a minute or two depending on the amount of files in the
folder. I can select items and open previews.
I use Ubuntu 9.04 and digiKam 0.10.0. I have not done anny compilation on my
own, use only files from the repositorys.
 Havent noticed this behaviour on my Acer with S3 graphichs only on the Asus
with nVidia.

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--- Comment #14 from Paul Waldo <paul waldoware com>  2009-06-26 16:36:13 ---
I can confirm this problem.  I get thumbnails that blink and are blank until I
mouse over them.  Sometimes the blinking goes on continuously, pegging the CPU.
 I see this in Digikam SVN (1.0.0-beta2 rev. 987666) KDE version 4.2.2

When I go back to my disto's version (Ubuntu 0.10.0), the blinking is not as
bad, but I can reproduce by scrolling within an album.  As the thumbnails are
scrolled, they blink quite a bit.

I also have recently moved my albums, although I'm not sure that is what is
causing the problem.  If you can't reproduce, maybe try creating a symlink to
an existing Album Directory, then adding that to the DB?

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--- Comment #15 from Paul Waldo <paul waldoware com>  2009-06-26 16:39:56 ---
Sorry, forgot to mention that I did the steps in comment 10.  I did a "make
clean", got the latest from SVN, set -DENABLE_THUMBS_DB=ON and recompiled.

I see a new database next to digikam4.db: thumbnails-digikam.db, about 5.2M in
size.

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|0.11.0-svn                  |1.0.0




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--- Comment #16 from Gregor Kappler <g kappler gmx net>  2009-08-07 22:09:31 ---
*** Bug 202955 has been marked as a duplicate of this bug. ***

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--- Comment #17 from Gregor Kappler <g kappler gmx net>  2009-08-13 19:42:45 ---
I meanwhile compiled 1.0.0 beta3 with the -DENABLE_THUMBS_DB=ON option. The
thumbnail database is created.
Sometimes when I start digikam there is no flickering - sometimes there still
is.

May this be due to updating the images on the canvas when any image thumbnail
is updated in the database? (Just my two cents...)

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