[Libreoffice-bugs] [Bug 124691] New: Slow mouse wheel scrolling in Writer with GTK3 interface

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=124691

            Bug ID: 124691
           Summary: Slow mouse wheel scrolling in Writer with GTK3
                    interface
           Product: LibreOffice
           Version: 6.2.2.1 rc
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: roland65 at free.fr

Created attachment 150699
  --> https://bugs.documentfoundation.org/attachment.cgi?id=150699&action=edit
Example of complex document with graphics

Mouse scrolling complex documents is painfully slow in Writer with the GTK3
interface (on Linux).

I've attached an example document to this bug report.

See also bug #104716
(https://bugs.documentfoundation.org/show_bug.cgi?id=104716).

To reproduce:

1. Open the attached document in Writer with the GTK3 interface and set zoom
level to 140%

2. Go to page 104 and scroll around several pages with the mouse. The scrolling
is very slow, much slower than scrlling the pages with the keyboard.

3. Open the attached document in Writer with the GTK2 interface and set zoom
level to 140%

4. Go to page 104 and scroll around several pages with the mouse. The scrolling
is now fluid.

Hardware: HP workstation z820, with two Intel Xeon E5-2687W 0 @ 3.10GHz (16
cores, 32 threads), Nvidia Quadro K2000, 128 GB RAM

System: Ubuntu Linux 18.04 64 bits

Graphics driver: Nvidia 418 or Nouveau

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