https://bugs.documentfoundation.org/show_bug.cgi?id=168418
Bug ID: 168418
Summary: Smooth Scroll: Visual artifacts after scrolling
up/down
Product: LibreOffice
Version: 25.8.1.1 release
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Writer
Assignee: [email protected]
Reporter: [email protected]
Blocks: 98754
Created attachment 202836
--> https://bugs.documentfoundation.org/attachment.cgi?id=202836&action=edit
Monospace.Alphabet.-.a-z.lines.odt
In LibreOffice:
- Tools > Options
- LibreOffice Writer > View
- Make sure the "Smooth Scroll" checkbox is ON.
STEPS TO REPRODUCE
Then you can:
0. Open attached document.
1. Press "Page Down" 2 times.
2. Press "Page Up" 2 times.
BUG: Certain lines randomly get:
- weird rendering artifacts
- OR "vertical dots"
- OR "vertical lines"
- OR weird "blank lines".
(See attached screenshots.)
- - -
NOTE #1: You can also:
- Press the up/down ARROW KEYS
- Use the mouse scroll wheel
to go back/forth between pages, getting similar symptoms.
But it DOES NOT occur if you:
- Use the mouse and drag the scrollbar up/down manually.
- - -
NOTE #2: The visual artifacts seem to only start "at the edge" of the page, but
once they "stick" to that line, they stay stuck to that line until they go off
the screen again.
(So a "Page Down" might only cause 1 artifact to be on the screen. But multiple
"ARROW DOWN" might cause a new artifact every handful of lines.)
- - -
NOTE #3: I also tested it with various skia "Graphics Output" options under:
- Tools > Options
- LibreOffice > View
This bug still occurs with all combos of ON/OFF:
ABOUT 1 (my default):
- ON = "Use Skia for all rendering"
- OFF = "Force Skia Software rendering"
Version: 25.8.1.1 (X86_64)
Build ID: 54047653041915e595ad4e45cccea684809c77b5
CPU threads: 8; OS: Windows 11 X86_64 (build 22631); UI render: Skia/Vulkan;
VCL: win
Locale: en-US (en_US); UI: en-US
Calc: threaded
ABOUT 2:
- OFF = "Use Skia for all rendering"
- OFF = "Force Skia Software rendering"
Version: 25.8.1.1 (X86_64)
Build ID: 54047653041915e595ad4e45cccea684809c77b5
CPU threads: 8; OS: Windows 11 X86_64 (build 22631); UI render: default; VCL:
win
Locale: en-US (en_US); UI: en-US
Calc: threaded
ABOUT 3: (INCREDIBLY SLOW scrolling.)
- ON = "Use Skia for all rendering"
- ON = "Force Skia Software rendering"
Version: 25.8.1.1 (X86_64)
Build ID: 54047653041915e595ad4e45cccea684809c77b5
CPU threads: 8; OS: Windows 11 X86_64 (build 22631); UI render: Skia/Raster;
VCL: win
Locale: en-US (en_US); UI: en-US
Calc: threaded
Here is the skia.log for ABOUT 1:
RenderMethod: vulkan
Vendor: 0x10de
Device: 0x2504
API: 1.4.312
Driver: 580.352.0
DeviceType: discrete
DeviceName: NVIDIA GeForce RTX 3060
Denylisted: no
Referenced Bugs:
https://bugs.documentfoundation.org/show_bug.cgi?id=98754
[Bug 98754] [META] Smooth scroll in whole LibreOffice suite
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