Bug 413250

Summary:	Gwenview : No fading transition
Product:	[Applications] gwenview	Reporter:	Lapineige <lp.kde>
Component:	general	Assignee:	Gwenview Bugs <gwenview-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	justin.zobel, nate
Priority:	NOR
Version First Reported In:	19.04.3
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Lapineige 2019-10-20 18:20:16 UTC

SUMMARY

No fade transition between images in Gwenview

STEPS TO REPRODUCE
1. Open Gwenview, activate transition effect (fade) (OpenGl or Software, both shows the same result)
2. Show some images
3. Change from one image to another

OBSERVED RESULT
No fading appears, or any kind of transition. Same as the "No" transition option.

EXPECTED RESULT

Some fade when transitioning from an image to another.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 19.04
(available in About System)
KDE Plasma Version: 5.16.5
KDE Frameworks Version: 5.62.0
Qt Version: 5.12.2
Nvidia driver: 430.50

(I'm using Kubuntu PPA)

ADDITIONAL INFORMATION

Nothing is shown when I launch it in a console. I don't know how to provide any log.

I wonder if this did appear after an Nvidia driver update… (but can't remember)
This bug is several Nvidia driver, Linux kernel and Kubuntu framework versions old.
At some point in the past, animations where really slow, I did came back to the "No" animation option. Then it worked again… without animations.

My apologies if it's not the right place for this, or not a bug with Gwenview, but I have this bug this months and don't know what's going on.

Comment 1 Nate Graham 2019-10-27 23:04:32 UTC

Works for me FWIW. :/

Comment 2 Lapineige 2019-10-28 18:30:49 UTC

As I expected :/ (I guess if it was a common bug it would have been already reported)
How can I provide you some logs ?

---

Updated to Nvidia 440, same issue.

Comment 3 Lapineige 2019-11-11 22:12:59 UTC

Another information: CPU usage for Gwenview process is quite high when I change the displayed image (and thus trigger a transition).
And indeed, it seems laggy and takes its time to display the new image. It doesn't seem to be caused by the storage (which is fast enough).

Maybe it does indicate that the CPU is used instead of OpenGL (hence the GPU) for the transition ?

Comment 4 Justin Zobel 2020-11-20 04:58:10 UTC

Thanks for the report. I've just tested this on gwenview 20.08.3 and I can't reproduce the issue.

Can you please test and confirm if this issue is still occurring or if this bug report can be marked as resolved. I'm setting status to "needsinfo" pending your response, please change back to "reported" or "resolved" when you respond, thanks.

Comment 5 Lapineige 2020-11-20 08:07:38 UTC

I'm closing this bug, I'm no longer using that computer so I can't investigate deeper. Thanks for the reminder.