Bug 696823

Summary: Animation stutter/jank with modal dialog
Product: [Fedora] Fedora Reporter: Sitsofe Wheeler <sitsofe>
Component: mutterAssignee: Peter Robinson <pbrobinson>
Status: CLOSED CURRENTRELEASE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: unspecified    
Version: 15CC: maxamillion, otaylor, pbrobinson, walters
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-04-05 17:17:33 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
Screenshot of the modal dialog mid animation
none
Screenshot of the modal dialog after animation finishes none

Description Sitsofe Wheeler 2011-04-14 22:42:43 UTC 
Description of problem:
Sometimes when showing a modal dialog it will suddenly shift to the left after the animation finishes creating GUI jank/stuttering.

Version-Release number of selected component (if applicable):
mutter-3.0.0-1.fc16

How reproducible:
Reproducible every time with gnome-control-center.

Steps to Reproduce:
1. Run
gnome-control-center user-accounts
2. Click on the Disabled button to the right of "Fingerprint Login".

or if you have Google Chrome installed:
1. Run
google-chrome
2. Click on the spanner at the top right and go to About Google Chrome. 
  
Actual results:
Dialog smoothly folds down the suddenly jumps to the left after the animation has finished.

Expected results:
Dialog to fold down in the correct position so it does not need to be fixed when the animation has finished.

Additional info:
With Chrome the jarring jump at the end doesn't always happen.
Comment 1 Sitsofe Wheeler 2011-05-30 20:09:49 UTC 
In Fedora 15 / Chrome 12.0.718.0 the problem is no longer visible. The fingerprint dialog still shows the problem in Fedora 15 final though.
Comment 2 Peter Robinson 2011-06-11 13:55:00 UTC 
what graphics card do you have?
Comment 3 Sitsofe Wheeler 2011-06-11 15:10:40 UTC 
I have an i945. The problem is so much the number of frames per second though - it's the fact that the horizontal alignment is only fixed right at the end.
Comment 4 Peter Robinson 2011-08-18 22:38:55 UTC 
I thin this should be fixed now with the new mesa/kernel. Please confirm
Comment 5 Sitsofe Wheeler 2011-08-19 07:57:01 UTC 
Peter:
I'm afraid this is not fixed with a new kernel/mesa:

kernel-2.6.40-4.fc15.x86_64
mesa-libGL-7.11-1.fc15.x86_64

The problem is not so much missing frames (which might suggest driver issues) in so much as the initial horizontal alignment that the window starts at is wrong.

Imagine the x is the dialog it slides down

    x
    |
    |
    v 

Then right at the end it jumps to the left:

    |
    |
    |
 <--x

so this is the path it took:

    |
    |
    |
x<--+

The problem appears to be the starting horizontal alignment is wrong. The modal dialog's right edge is touching its parent windows right edge and when the downward slide is finished it realises that it should have been horizontally centred.
Comment 6 Sitsofe Wheeler 2011-08-19 07:59:58 UTC 
Created attachment 518982 [details]
Screenshot of the modal dialog mid animation
Comment 7 Sitsofe Wheeler 2011-08-19 08:00:31 UTC 
Created attachment 518983 [details]
Screenshot of the modal dialog after animation finishes
Comment 8 Sitsofe Wheeler 2012-04-05 17:17:33 UTC 
I can't reproduce this problem in Fedora 17 beta RC3 - closing as fixed current
release.