Re: FVWM: Possible bug: Jumping pointer in Darktable

Stefan Klinger <[email protected]> writes:

> Dan Espen (2018-Dec-30, excerpt):
>> Okay I can confirm on my system that the circle jumps away when
>> I try to drag.  Removing the key binding fixes the problem.
>
> Thank you very much Dan.  So there is someone with FVWM who can
> reproduce the bug.
>
>> I had problems with the pencil drawing tool, but they've gone away.
>> I would draw an object like a square and it would show up rotated vs.
>> where I drew it.  Something like darktable didn't know where the pointer
>> was, similar to the jumping issue.  I wonder if some code that was
>> swapping x and y coordinates would cause objects to rotate (about 45
>> degrees).
>
> Interesting.  I've not seen this yet, but a similar report showed up
> here [1], note 20.  That reporter is using Ubuntu 18.04.1 LTS.
>
>> I recently installed a new monitor and video card.
>> Now using Nvidia 390xx instead of Nvidia 304xx.
>
> I'm using a GeForce GTX 1060.

1050 TI here.

>> Not sure what is going on or where to even look.
>
> No worries, nobody seems to know.  I'm trying to talk darktable devs
> into looking at this.
>
>> You previously reported that you found the darktable commit that
>> caused the problem to start.  Anything interesting in that commit?
>
> Not really.  A discussion with one of the devs is here [2], he ran a
> couple of tests, but did not find anything.  Said that GTK was not his
> field.

After reading the thread pointed to, I still have no idea what changed
in darktable or why the dev is blaming GTK.

>> You also reported that other WMs had this problem.
>
> There are reports about KDE Plasma [3], Elementary OS Juno [4], fluxbox
> [5], Ubuntu 18.04.1 LTS [1].  Unfortunately these guys were not more
> specific about key bindings.
>
> Thanks you very much for clearly verifying this bug, I was starting to
> doubt myself.  If you have no Idea where to look, no worries, I'm sure
> it's a draktable thing, but I haveno knowledge about the intricacies
> of GUI developement.

With 4 other WMs having the same issue, I agree darktable is the
problem.

-- 
Dan Espen