[Libreoffice-bugs] [Bug 136527] New: Resizing textboxes in LibreOffice Impress is terribly slow.

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=136527

            Bug ID: 136527
           Summary: Resizing textboxes in LibreOffice Impress is terribly
                    slow.
           Product: LibreOffice
           Version: 7.0.0.3 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: cocii at gmx.de

Description:
What I did:
- installed LibreOffice on fresh Ubuntu 20.04 on my machine (AMD Radeon Vega 64
GPU, Intel i7-3770K CPU)
- opened LibreOffice Impress (--safe mode to reset settings)
- created an empty/new presentation
- resized the default text boxes using the handles on the side

What happened:
- Textbox resizing was very "laggy", text box resized very clunky, not smooth
at all.

What I expected: 
- Smooth resizing of the text boxes


- My Settings:
- all stock settings, Antialiasing is turned on (turning this off makes the
resizing smoother, however all other elements such as circles are ... not
antialised)
- Hardware acceleration is on (tried to turn this off too, no improvement)
- I tried to set the interface to GTK, QT and GEN using the environment
variable 
  SAL_USE_VCLPLUGIN. No difference.

I am running:
- LibreOffice Version 7.0.1-1
- Xorg 1.20.9-2
- latest AMD drivers (open-source version, Vulkan enabled)

Steps to Reproduce:
1. Create new presentation in loimpress w. anti-aliasing enabled (no theme)
2. Drag resizing handle of a text box
3. Experience "laggy"/non-smooth resizing

Actual Results:
"laggy"/clunky/"low-fps" rendering; resizing process is not smooth

Expected Results:
Resizing should be smooth


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
Version: 7.0.1.2
Build ID: 00(Build:2)
CPU threads: 8; OS: Linux 5.8; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
=7.0.1-1
Calc: threaded

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