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Bug 134423 - Slides show completely white in the slide pane (Linux kf5 and gtk3)
Summary: Slides show completely white in the slide pane (Linux kf5 and gtk3)
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Impress (show other bugs)
Version:
(earliest affected)
7.0.0.0.alpha0+
Hardware: All Linux (All)
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords: bibisected, bisected, regression
Depends on:
Blocks: Regressions-cairo-speedup
  Show dependency treegraph
 
Reported: 2020-06-30 15:49 UTC by Gerald Pfeifer
Modified: 2020-08-20 09:01 UTC (History)
5 users (show)

See Also:
Crash report or crash signature:


Attachments
Minimized presentation (2.03 MB, application/vnd.oasis.opendocument.presentation)
2020-06-30 15:49 UTC, Gerald Pfeifer
Details

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Description Gerald Pfeifer 2020-06-30 15:49:17 UTC
Created attachment 162548 [details]
Minimized presentation

This is an excerpt of a bigger presentation; it still exhibits the reported
issue for me.

How to reproduce:

 1. Open presentation

 2. Observe how the slides in the slide pane both appear empty (= white only).
    
 3. Invoke presentation mode

 4. Observe how slides are shown as black only.

Both 2 and 4 probably are manifestations of the same issue.

Version: 7.0.0.0.beta2+
Build ID: 77e4943cc6cf206a45901e5c87fabf0f783c8262
CPU threads: 4; OS: Linux 5.7; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
TinderBox: Linux-rpm_deb-x86_64@86-TDF, Branch:libreoffice-7-0, Time: 2020-06-24_02:22:53
Calc: threaded

Also seen with a recent 7.1 alpha.

Regression from 6.4.4.2 which only exhibits issue 4, not issue 2.
Comment 1 Regina Henschel 2020-06-30 19:38:58 UTC
I cannot confirm it.

It looks OK in Version: 7.1.0.0.alpha0+ (x64)
Build ID: ba33a51ff1eb34a5983870dcb50e975002e6d3a4
CPU threads: 8; OS: Windows 10.0 Build 18362; UI render: Skia/Raster; VCL: win
Locale: de-DE (en_US); UI: en-US
Calc: CL

and in Version: 6.4.5.0.0+ (x64)
Build ID: 70a2071ce91b71326659e645dd97996262ea309a
CPU threads: 8; OS: Windows 10.0 Build 18362; UI render: default; VCL: win; 
Locale: de-DE (en_US); UI-Language: en-US
Calc: threaded

and in Version: 7.0.0.0.beta1+ (x64)
Build ID: 900ffff8b5718113e5b3ab7e9fbf35b999661c39
CPU threads: 8; OS: Windows 10.0 Build 18362; UI render: Skia/Vulkan; VCL: win
Locale: en-US (en_US); UI: en-US
Calc: CL
Comment 2 Gerald Pfeifer 2020-06-30 20:42:35 UTC
(In reply to Regina Henschel from comment #1)
> I cannot confirm it.

Maybe it's related to Qt3 or Linux?

Marina reproduced the original, full testcase before I filed this.

In addition to 7.0.0.0.beta2+ from TDF's dev-builds I just reproduced
with 7.1.0.0.alpha0+
     Build ID: 17f131fcb3f534792a3b2ec6048d03fb54b55eb1
     CPU threads: 4; OS: Linux 5.7; UI render: default; VCL: gtk3
     Locale: en-US (en_US.UTF-8); UI: en-US
     TinderBox: Linux-rpm_deb-x86_64@86-TDF, Branch:master, Time: 2020-06-29_11:30:56


Marina, can you reproduce this minimized testcase, too?
Comment 3 Buovjaga 2020-07-01 09:07:08 UTC
Yep, Win does not show the issues.

Linux gen backend does not show the issue in step 2.

Arch Linux 64-bit
Version: 7.1.0.0.alpha0+
Build ID: 21c0deb19890703a9eaf24403e60c4c7546a0bfe
CPU threads: 8; OS: Linux 5.7; UI render: default; VCL: kf5
Locale: fi-FI (fi_FI.UTF-8); UI: en-US
Calc: threaded
Built on 30 June 2020
Comment 4 Buovjaga 2020-07-01 17:02:31 UTC
Bibisected the blank previews issue with Linux 7.0 repo and got https://git.libreoffice.org/core/+/828504974d70111e4a35b31d579cf42fe660a660%5E!/
tdf#130768 speedup huge pixel graphics Cairo

Adding Cc: to Armin Le Grand

Slideshow blackness would have deserved its own report. It is already in oldest of 6.3 repo
Comment 5 Gerald Pfeifer 2020-07-02 21:32:27 UTC
(In reply to Buovjaga from comment #4)
> Slideshow blackness would have deserved its own report. It is already in
> oldest of 6.3 repo

Thanks - I'll wait how the regression is addressed and then file another
report if necessary. Somehow I still feel those two may be connected -
that would be quite a co-incidence otherwise?
Comment 6 Gerald Pfeifer 2020-07-24 11:19:07 UTC
(In reply to Buovjaga from comment #4)
> Slideshow blackness would have deserved its own report. It is already in
> oldest of 6.3 repo

I now split of "slideshow blackness", cf.
https://bugs.documentfoundation.org/show_bug.cgi?id=135094
Comment 7 Gerald Pfeifer 2020-08-17 12:00:37 UTC
(In reply to Buovjaga from comment #4)
> Bibisected the blank previews issue with Linux 7.0 repo and got
> https://git.libreoffice.org/core/+/
> 828504974d70111e4a35b31d579cf42fe660a660%5E!/
> tdf#130768 speedup huge pixel graphics Cairo
> 
> Adding Cc: to Armin Le Grand
> 
> Slideshow blackness would have deserved its own report. It is already in
> oldest of 6.3 repo

Indeed, the slideshow blackness has now been addressed (bug #135094) and
the original issue (white slides in the slide pane) still is there, so two
different code paths.

Maybe it's the same trigger in that working on bug#135094 Miklos found a
0cm x 0cm image in the sample slide deck that triggered the blackness in
presentation mode.

Hopefully a good hint for someone looking into the blank preview issue?