Bug 91943 - Visual flicker of black dots when moving between cells
Summary: Visual flicker of black dots when moving between cells
Status: RESOLVED WORKSFORME
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Impress (show other bugs)
Version:
(earliest affected)
Inherited From OOo
Hardware: Other All
: medium minor
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-06-08 18:17 UTC by Yousuf Philips (jay) (retired)
Modified: 2018-07-13 17:38 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:


Attachments
screencast (411.95 KB, video/webm)
2015-06-08 18:17 UTC, Yousuf Philips (jay) (retired)
Details
screenshot from the video with highlights around the black dots (69.79 KB, image/png)
2015-06-08 18:47 UTC, Yousuf Philips (jay) (retired)
Details

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Description Yousuf Philips (jay) (retired) 2015-06-08 18:17:43 UTC
Created attachment 116381 [details]
screencast

Steps:
1) Open Impress
2) Set slide layout to 'Title, Content'
3) Click on the table icon the content textbox
4) Press okay in the insert table dialog
5) Table row heights are quite small
6) Increase the row heights by mouse dragging the bottom middle square
7) Deselect table by clicking in white area
8) Click in a cell of the table
9) Click in another cell of the table
10) Notice some black dots appear for a few miliseconds when doing this.

Version: 5.1.0.0.alpha1+
Build ID: 587006cac508616f486aea45e265a170bcccdc87
TinderBox: Linux-rpm_deb-x86_64@46-TDF, Branch:master, Time: 2015-06-06_00:16:39
Comment 1 Yousuf Philips (jay) (retired) 2015-06-08 18:47:56 UTC
Created attachment 116384 [details]
screenshot from the video with highlights around the black dots
Comment 2 Buovjaga 2015-06-11 12:24:58 UTC
Reproduced.

Win 7 Pro 64-bit Version: 5.1.0.0.alpha1+
Build ID: 5fc0cbbc1254223fedf0f78c5e7539219b228697
TinderBox: Win-x86@39, Branch:master, Time: 2015-06-11_04:30:51
Locale: fi-FI (fi_FI)
Comment 3 Buovjaga 2015-06-11 14:09:22 UTC
Inherited from OOo.

Ubuntu 15.04 64-bit 
OpenOffice.org 3.3.0
OOO330m20 (Build:9567)
Comment 4 QA Administrators 2016-09-20 10:01:53 UTC Comment hidden (obsolete)
Comment 5 Mike 2018-07-13 15:43:41 UTC
@Buovjaga: What machine did you use to reproduce this issue three years ago?

IMHO it could be a performance issue and depends on the computer one uses.

The black dots appear in the same moment, that LOs sidebar flickers. (see screencast from Yousuf Philips).

I could only reproduce that in 3.3, but can't in later releases, even 5.0 (you confirmed for 5.1.0.0.alpha1+). Only with 3.3 (portable) I see a splitsecond of flickering. Later versions of Impress run faster either. 

Tested 6.1 RC1 and 6.2alpha on VBox VMs with 12 GB RAM, 64 MB Video Memory, 4 CPU Cores (100% Execution Cap). My host PC has 16 GB RAM, a SSD, a recent NVidia card and a i5-4670K CPU.

I set down the specs of my VMs massively, but could not provoke a flickering. Weird...

Version: 5.0.3.2
Build ID: e5f16313668ac592c1bfb310f4390624e3dbfb75-GL
Locale: de-DE (de_DE)
Version: 5.0.3.2

Version: 6.0.5.2 (x64)
Build ID: 54c8cbb85f300ac59db32fe8a675ff7683cd5a16
CPU threads: 4; OS: Windows 10.0; UI render: GL; 
Locale: de-DE (de_DE); Calc: CL

Version: 6.1.0.1 (x64)
Build-ID: 378e26bd4f22a135cef5fa17afd5d4171d8da21a
CPU-Threads: 4; BS: Windows 6.1; UI-Render: Standard; 
Gebietsschema: de-DE (de_DE); Calc: group threaded

Version: 6.2.0.0.alpha0+
Build ID: 8e9d43546c8e46ea635472ddf07f5c183dc13360
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk2; 
TinderBox: Linux-rpm_deb-x86_64@70-TDF, Branch:master, Time: 2018-07-12_01:06:03
Locale: en-US (en_US.UTF-8); Calc: group threaded
Comment 6 Buovjaga 2018-07-13 17:38:46 UTC
My testing machine in 2015 was a Thinkpad T520 laptop (2012).

Now it seems the black dots along with the flickering in the sidebar is gone (latest master on Win in a VM). Tried also with gen VCL backend on Linux and no dots.

Thanks, Mike!