[Bug 1425146] New: Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Bug ID: 1425146
           Summary: Blender UI flickering on viewport updates
           Product: Fedora
           Version: rawhide
         Component: blender
          Severity: medium
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail]

Description of problem:
Whenever the viewport gets updated in blender, parts of the UI start to
flicker.

In the flickering area it seems to display uninitialized video data as
distorted content from closed programs can be seen; so this might be a video
driver bug.

Version-Release number of selected component (if applicable):
blender 2.78a

How reproducible:
Trigger an update of the viewport in blender.

Steps to Reproduce:
1. Open Blender
2. Middle click and drag the viewport to move around the scene

Actual results:
The UI elements flicker as long as the camera moves

Expected results:
No flickering

Additional info:

$ lspci | grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Tahiti PRO [Radeon HD 7950/8950 OEM / R9 280]

The bug occurs on X and Wayland.

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Kai A. Hiller  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |Desktop

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Luya Tshimbalanga  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]
              Flags|                            |needinfo?([e-mail])

--- Comment #1 from Luya Tshimbalanga  ---
(In reply to Kai A. Hiller from comment #0)
> Description of problem:
> Whenever the viewport gets updated in blender, parts of the UI start to
> flicker.

Hello Kai, 
Could you run this update
https://bodhi.fedoraproject.org/updates/FEDORA-2017-cb90d53994
or execute the command via terminal

sudo dnf upgrade blender --enablerepo=updates-testing

to see if that flickering issue goes away? 
It looks like a driver issue at the first impression but more information is
needed.

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Kai A. Hiller  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|needinfo?([e-mail]) |

--- Comment #2 from Kai A. Hiller  ---
The problem persists in blender 2.78b.

As a note: I am on Rawhide, so I had to downgrade libGLEW from 2.0.0 → 1.13.0
to make the f25 package you suggested work.

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #3 from Luya Tshimbalanga  ---
(In reply to Kai A. Hiller from comment #2)
> The problem persists in blender 2.78b.
>
> As a note: I am on Rawhide, so I had to downgrade libGLEW from 2.0.0 →
> 1.13.0 to make the f25 package you suggested work.

It would not matter. It appears the issue is related to Radeon GPU driver  as I
found a related problem on upstream bug report:
https://developer.blender.org/T48817

I confirm the bug on my AMD/AMD hybrid laptop. However, I am unable to
reproduce it on Virtualbox and Gnome Boxes. Need to further verify on nVidia
and Intel hardware.

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #4 from Luya Tshimbalanga  ---
Further research revealed a bug from upstream where blender with Window Draw
Method set to automatic will not assign to Triple Buffer

https://developer.blender.org/T49945

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Luya Tshimbalanga  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |needinfo?([e-mail])

--- Comment #5 from Luya Tshimbalanga  ---
Could you try this workaround on terminal?
LIBGL_DRI3_DISABLE=1 blender

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Kai A. Hiller  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|needinfo?([e-mail]) |

--- Comment #6 from Kai A. Hiller  ---
Setting LIBGL_DRI3_DISABLE=1 fixes the issue. Also changing blender to use
Triple Buffering fixes the issue (File → User Preferences → Window Draw Method:
Triple Buffer).

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Luya Tshimbalanga  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |needinfo?([e-mail])

--- Comment #7 from Luya Tshimbalanga  ---
Could you test this scratch build on rawhide?
https://koji.fedoraproject.org/koji/taskinfo?taskID=18048028

It contains upstream patch that added missing AMD GPU detection. Please set
Window Draw Method to Automatic and verify if the fix eliminates flickering on
UI. Thanks.

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Kai A. Hiller  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|needinfo?([e-mail]) |

--- Comment #8 from Kai A. Hiller  ---
The build fixes the issue :)

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #9 from Luya Tshimbalanga  ---
Excellent. The build is on the way. Please add karma to make it available on
stable repository.

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #10 from Fedora Update System  ---
blender-2.78b-2.fc24 has been submitted as an update to Fedora 24.
https://bodhi.fedoraproject.org/updates/FEDORA-2017-e827f09c86

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |MODIFIED

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #11 from Fedora Update System  ---
blender-2.78b-2.fc25 has been submitted as an update to Fedora 25.
https://bodhi.fedoraproject.org/updates/FEDORA-2017-c4ee520d53

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|MODIFIED                    |ON_QA

--- Comment #12 from Fedora Update System  ---
blender-2.78b-2.fc24 has been pushed to the Fedora 24 testing repository. If
problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here:
https://bodhi.fedoraproject.org/updates/FEDORA-2017-e827f09c86

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #13 from Fedora Update System  ---
blender-2.78b-2.fc25 has been pushed to the Fedora 25 testing repository. If
problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here:
https://bodhi.fedoraproject.org/updates/FEDORA-2017-c4ee520d53

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #15 from Fedora Update System  ---
YafaRay-3.2.0-0.6.20170221git.fc25 LuxRender-1.6-9.fc25 blender-2.78c-1.fc25
has been submitted as an update to Fedora 25.
https://bodhi.fedoraproject.org/updates/FEDORA-2017-ac6c25236a

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ON_QA                       |MODIFIED

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #16 from Fedora Update System  ---
YafaRay-3.2.0-0.6.20170221git.fc24 LuxRender-1.6-9.fc24 blender-2.78c-1.fc24
has been submitted as an update to Fedora 24.
https://bodhi.fedoraproject.org/updates/FEDORA-2017-eb813704bd

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|MODIFIED                    |CLOSED
   Fixed In Version|                            |blender-2.78b-2.fc25
         Resolution|---                         |ERRATA
        Last Closed|                            |2017-02-28 20:25:08

--- Comment #17 from Fedora Update System  ---
blender-2.78b-2.fc25 has been pushed to the Fedora 25 stable repository. If
problems still persist, please make note of it in this bug report.

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CLOSED                      |ON_QA
         Resolution|ERRATA                      |---
           Keywords|                            |Reopened

--- Comment #18 from Fedora Update System  ---
LuxRender-1.6-9.fc25, YafaRay-3.2.0-0.6.20170221git.fc25, blender-2.78c-1.fc25
has been pushed to the Fedora 25 testing repository. If problems still persist,
please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here:
https://bodhi.fedoraproject.org/updates/FEDORA-2017-ac6c25236a

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #19 from Fedora Update System  ---
LuxRender-1.6-9.fc24, YafaRay-3.2.0-0.6.20170221git.fc24, blender-2.78c-1.fc24
has been pushed to the Fedora 24 testing repository. If problems still persist,
please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here:
https://bodhi.fedoraproject.org/updates/FEDORA-2017-eb813704bd

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Simone Caronni  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #20 from Simone Caronni  ---
*** Bug 1429245 has been marked as a duplicate of this bug. ***

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #21 from Fedora Update System  ---
LuxRender-1.6-11.fc25 YafaRay-3.2.0-0.6.20170221git.fc25 blender-2.78c-1.fc25
has been submitted as an update to Fedora 25.
https://bodhi.fedoraproject.org/updates/FEDORA-2017-ac6c25236a

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ON_QA                       |MODIFIED

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #22 from Fedora Update System  ---
LuxRender-1.6-11.fc24 YafaRay-3.2.0-0.6.20170221git.fc24 blender-2.78c-1.fc24
has been submitted as an update to Fedora 24.
https://bodhi.fedoraproject.org/updates/FEDORA-2017-eb813704bd

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|MODIFIED                    |ON_QA

--- Comment #23 from Fedora Update System  ---
LuxRender-1.6-11.fc25, YafaRay-3.2.0-0.6.20170221git.fc25, blender-2.78c-1.fc25
has been pushed to the Fedora 25 testing repository. If problems still persist,
please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here:
https://bodhi.fedoraproject.org/updates/FEDORA-2017-ac6c25236a

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #24 from Fedora Update System  ---
LuxRender-1.6-11.fc24, YafaRay-3.2.0-0.6.20170221git.fc24, blender-2.78c-1.fc24
has been pushed to the Fedora 24 testing repository. If problems still persist,
please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here:
https://bodhi.fedoraproject.org/updates/FEDORA-2017-eb813704bd

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #25 from Fedora Update System  ---
LuxRender-1.6-11.fc25 YafaRay-3.2.0-0.6.20170221git.fc25 blender-2.78c-2.fc25
has been submitted as an update to Fedora 25.
https://bodhi.fedoraproject.org/updates/FEDORA-2017-ac6c25236a

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ON_QA                       |MODIFIED

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #26 from Fedora Update System  ---
LuxRender-1.6-11.fc24 YafaRay-3.2.0-0.6.20170221git.fc24 blender-2.78c-2.fc24
has been submitted as an update to Fedora 24.
https://bodhi.fedoraproject.org/updates/FEDORA-2017-eb813704bd

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|MODIFIED                    |ON_QA

--- Comment #27 from Fedora Update System  ---
LuxRender-1.6-11.fc24, YafaRay-3.2.0-0.6.20170221git.fc24, blender-2.78c-2.fc24
has been pushed to the Fedora 24 testing repository. If problems still persist,
please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here:
https://bodhi.fedoraproject.org/updates/FEDORA-2017-eb813704bd

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

--- Comment #28 from Fedora Update System  ---
LuxRender-1.6-11.fc25, YafaRay-3.2.0-0.6.20170221git.fc25, blender-2.78c-2.fc25
has been pushed to the Fedora 25 testing repository. If problems still persist,
please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here:
https://bodhi.fedoraproject.org/updates/FEDORA-2017-ac6c25236a

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ON_QA                       |CLOSED
   Fixed In Version|blender-2.78b-2.fc25        |blender-2.78b-2.fc25
                   |                            |blender-2.78c-2.fc24
         Resolution|---                         |ERRATA
        Last Closed|2017-02-28 20:25:08         |2017-03-23 13:20:41

--- Comment #29 from Fedora Update System  ---
LuxRender-1.6-11.fc24, YafaRay-3.2.0-0.6.20170221git.fc24, blender-2.78c-2.fc24
has been pushed to the Fedora 24 stable repository. If problems still persist,
please make note of it in this bug report.

[Bug 1425146] Blender UI flickering on viewport updates

https://bugzilla.redhat.com/show_bug.cgi?id=1425146

Fedora Update System  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
   Fixed In Version|blender-2.78b-2.fc25        |blender-2.78b-2.fc25
                   |blender-2.78c-2.fc24        |blender-2.78c-2.fc24
                   |                            |blender-2.78c-2.fc25

--- Comment #30 from Fedora Update System  ---
LuxRender-1.6-11.fc25, YafaRay-3.2.0-0.6.20170221git.fc25, blender-2.78c-2.fc25
has been pushed to the Fedora 25 stable repository. If problems still persist,
please make note of it in this bug report.