[Bug 241799] New: Digikam: marked images makes scrolling slow

[Thomas Damgaard]

https://bugs.kde.org/show_bug.cgi?id=241799

           Summary: Digikam: marked images makes scrolling slow
           Product: digikam
           Version: 1.2.0
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           1.2.0 (using KDE 4.2.2)
OS:                Linux

When I have multiple images marked in an album, scrolling down/up becomes very
slow. It seems that Digikam repaints all the marked thumbnails several times
while scrolling (they blink), while the unmarked thumbnails are not redrawn
(does not blink during scroll).



Reproducible: Always

Steps to Reproduce:
 * Open Digikam
 * Go to an album with several images (mine had a few hundred)
 * Scroll up and down
 * Take note of the responsiveness while scrolling.
 * Now, mark half of them by dragging a rectangle with the mouse
 * Use the scroll wheel to scroll down.
 * Note that the scrolling is much more unresponsive than without images
marked.

Actual Results:  
Scrolling becomes slow

Expected Results:  
Scrolling with marked images should be just as fast as with no images marked.

I use Kubuntu 10.04 with nouveau driver.
Hardware is:
Thinkpad T61p
2.5 GHz Core 2 Duo
4 GB RAM
Linux malbec 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 22:02:19 UTC 2010 i686
GNU/Linux

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[Thomas Damgaard]

https://bugs.kde.org/show_bug.cgi?id=241799


Thomas Damgaard <[hidden email]> changed:

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--- Comment #1 from Thomas Damgaard <thomasdn gmail com>  2010-06-15 09:18:08 ---
I have just tried this on a folder with several very small images (ca. 600x600
jpegs) and there is no problem with them. So it seems to depend on the size of
the images marked.

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=241799


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--- Comment #2 from Gilles Caulier <caulier gilles gmail com>  2010-06-15 09:20:13 ---
Never seen a dysfunction like this. Sound like a problem with your X server
installation or something like that... What's your graphic card ? Which driver
you use ?

Gilles Caulier

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--- Comment #3 from Thomas Damgaard <thomasdn gmail com>  2010-06-15 09:33:57 ---
Gilles, my graphics card:
01:00.0 VGA compatible controller: nVidia Corporation Quadro FX 570M (rev a1)

I can try with the nvidia-glx driver, when I get home later today.

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|general                     |Albums GUI




--- Comment #4 from Gilles Caulier <caulier gilles gmail com>  2010-06-15 09:42:45 ---
I remember some old NVidia dysfunction with KDE4. If you can try to use ATI
card. Drivers sound better under Linux.

Gilles Caulier

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--- Comment #5 from Thomas Damgaard <thomasdn gmail com>  2011-06-24 08:19:18 ---
2011/6/24 Matt Rogers <[hidden email]>:
> --- Comment #4 from Gilles Caulier <caulier gilles gmail com>  2010-06-15 09:42:45 ---
> I remember some old NVidia dysfunction with KDE4. If you can try to use ATI
> card. Drivers sound better under Linux.

Unfortuneately, I do not have access to an ATI card at the moment.

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--- Comment #6 from Gilles Caulier <caulier gilles gmail com>  2011-12-14 09:29:02 ---
Thomas,

This file still valid using digiKam 2.x serie ?

Gilles Caulier

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WAITINGFORINFO

--- Comment #7 from Gilles Caulier <[hidden email]> ---
Thomas,

This file still valid using digiKam 3.5.0 release ?

Gilles Caulier

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[Gilles Caulier-4]

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--- Comment #8 from Gilles Caulier <[hidden email]> ---
New digiKam 4.11.0 is available :

https://www.digikam.org/node/740

Can you reproduce the problem with this release ?

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[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Version Fixed In|                            |5.1.0
         Resolution|WAITINGFORINFO              |FIXED

--- Comment #9 from [hidden email] ---
With digiKam 5.0.0  this problem is not reproducible.
I close this file now. Don't hesitate to re-open if necessary.
Gilles Caulier

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