Transparency slider slow on Ubuntu

Thanks JazzyNico.

I'd like to help out any way I can - for example, I probably can give you more detailed system/os description, but I don't know how to do that. Is there a command to produce a system configuration report? Also, installed libraries etc. I guess is of interest in reproducing.

.. Under Ubuntu 9.04 that is, of course.

Don't worry, your report is very clear.
Debugging that kind of issue (with no crash) seems a bit difficult to me. Maybe a gdb expert could give some tips?
It could help if you find out what specific action (if any) triggers this bug. Or if someone else can reproduce it.

Reproduce (on my system):

1. F4 - draw a rectangle
2. F1 - select it
3. Ctrl+Shift+F grab and drag Transparency slider (I think it may be called Opacity in 0.47?) for object (not alpha value for stroke/fill color)
4. Notice the 2-5 second delay between each update of rectangle graphcis/slider position. It sometimes freezes Inkscape to "gray mode" (application not responding to events) on my Ubuntu computer.

Not reproduced on Ubuntu 9.10, Inkscape 0.47pre4.
This time I've tested with a blank new document, but I've never noticed it before, even with more complex drawings.

Do you use the default (on 9.04) 0.46 Inkscape version, or a compiled one?

Thanks for testing. I'm on a AMD64 system, 9.04, Inkscape 0.46 (don't know sub-version-number).

The complexity of the drawing does not affect the performance of the slider - or rather, it is quite slow with a blank+rectangle already. I have not been bald enough to try it with a complex drawing yet ;)

I use the default Inkscape that came with 9.04.

Could it be something with the graphics card? I have an NVidia card, and I have tried two different driver-versions (180 and 93 or something) but that did not make a difference.

Or is the slider/transparency performance not at all related to gfx driver/hardware?

@Olof, do you still use Inkscape 0.46 and Ubuntu 9.04? If not, could you confirm you still have this issue with a more recent OS/Inkscape version?

> Could it be something with the graphics card?

It could be a performance issue, but not necessarily due to the graphic card.

I'm not fluent enough to update neither the OS nor Inkscape on my Ubuntu computer (10.04 "hangs" while live booting it).

I am hoping this problem will disappear with my new computer which I'm picking up any day soon. I'm not using Inkscape on Ubuntu due to this problem and some stability issues, primarily with bitmap handling.

@Olof, did this issue disappear with your new computer (if it's still on Ubuntu, of course)?

Closing by lack of user feedback.
If the problem reappears, feel free to reopen this report.