Issue 127979 - Abnormal CPU usage scrolling page
Summary: Abnormal CPU usage scrolling page
Alias: None
Product: General
Classification: Code
Component: ui (show other issues)
Version: 4.1.6
Hardware: Mac Other OS
: P5 (lowest) Critical with 2 votes (vote)
Target Milestone: ---
Assignee: AOO issues mailing list
QA Contact:
Depends on:
Reported: 2019-01-01 01:32 UTC by Arnold
Modified: 2019-04-04 11:38 UTC (History)
3 users (show)

See Also:
Issue Type: DEFECT
Latest Confirmation in: ---
Developer Difficulty: ---


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Description Arnold 2019-01-01 01:32:15 UTC
my system is MacOS Moave 

$ sw_Vers
ProductName:	Mac OS X
ProductVersion:	10.14.2
BuildVersion:	18C54

My Hardware:

iMac (Retina 5K, 27-inch, Late 2015)
Processor 3,2 GHz Intel Core i5
Memory 24 GB 1600 MHz DDR3
Graphics AMD Radeon R9 M390 2048 MB

When I scrolling a spreadsheet in Calc or a page in Write the system show an abnormal CPU usage of OpenOffice process in the order of 60-90% with an heavy slowdown of application. At the end of scrolling operation the CPU turn immediately into 10-20%.

Starting OpenOffice with in Low Resolution there isn't the problem but the UI is too blurred.

May be something about Apple Retina display?

Unfortunately it's very tedious use OpenOffice suite with this issue. 

Many Thanks for your support.

Comment 1 oooforum (fr) 2019-01-30 11:21:47 UTC
Could you tell us the screen resolution used?
Comment 2 Arnold 2019-03-18 09:07:33 UTC
  Display Type:	Built-In Retina LCD
  Resolution:	5120x2880 Retina
  Framebuffer Depth:	30-Bit Colour (ARGB2101010)
Comment 3 tintin60 2019-04-03 23:38:27 UTC

Idem for me. Jerky scrolling only when using Apache OpenOffice (4.1.6).
MacBook Pro 2019 - MacOS 10.14.4 Mojave
Ecran LCD Retina intégré
Résolution 2560 × 1600
24 bits colour (ARGB8888)

Previously on MacBook Pro mid 2010 - MacOS 10.13.6
Ecran LCD
Resolution 1280 x 800
Fluent scrolling.

Comment 4 Peter 2019-04-04 06:35:52 UTC
What are your scrolling preference set to?
Comment 5 tintin60 2019-04-04 07:10:21 UTC

mouse options :
Scrolling speed : regardless of the position between slow and speed + with inertia or without inertia = jerky scrolling.

Normal scrolling otherwise.
Comment 6 tintin60 2019-04-04 11:38:19 UTC
More information

Jerky scrolling generated when using vertical and horizontal Scrollbars