Open Bug 1661264 Opened 1 year ago Updated 10 days ago

Intermittent UI glitch causing the Print preview "pages" dropdown to be overlapped

Categories

(Core :: Graphics: WebRender, defect)

x86_64
Linux
defect

Tracking

()

Tracking Status
firefox81 --- disabled
firefox82 --- disabled
firefox83 --- disabled

People

(Reporter: cornel_ionce, Unassigned)

References

(Blocks 1 open bug)

Details

Attachments

(1 file)

Attached image pages_dropdown_overlap

Affected versions

  • 82.0a1 (BuildId:20200825094622)
  • 81.0b2 (BuildId:20200825191644)

Affected platforms

  • Ubuntu 20.04 64bit

Steps to reproduce

  1. Launch Firefox.
  2. Open any webpage.
  3. Hit CTRL + P.
  4. Open the pages dropdown.

Expected result

  • The dropdown is correctly displayed.

Actual result

  • Intermittently, the dropdown is overlapped by the preview section.

Regression Window

Additional Information

  • I'd set this S4 since it's a glitch that reproduces highly intermittent (maybe 5 tries out out 100).
  • I was unable to reproduce this on Windows 10x64 and macOS 10.15.
  • No console error are present.
Has Regression Range: --- → yes
Has STR: --- → yes
Flags: needinfo?(emalysz)
Severity: -- → S4
Priority: -- → P2
Summary: [Ubuntu] Intermittent UI glitch on the Print preview "pages" dropdown → [Ubuntu] Intermittent UI glitch causing the Print preview "pages" dropdown to be overlapped
Whiteboard: [print2020_v81] [old-ui-] → [print2020_v82][old-ui-]

Hi Cornel,

we've made a bunch of changes in that code recently. Is this still reproducable on Nightly?

Flags: needinfo?(cornel.ionce)
Duplicate of this bug: 1664145

This video from the duped bug looks like it might be helpful here https://drive.google.com/file/d/1s8CzdYaB1vR7B1ab8dZgs0ezRWGwWxgP/view.

QA Whiteboard: [qa-regression-triage]

I'm still able to reproduce this with 2020-09-10 Nightly (buildID 20200910152110).
Removing the regressionwindow-wanted flag since it was provided in the description.

Flags: needinfo?(cornel.ionce)

Moving to 83.

Flags: needinfo?(emalysz)
Whiteboard: [print2020_v82][old-ui-] → [print2020_v83][old-ui-]

Cornel, can you check if you have WebRender enabled? If so does toggling it change anything?

Flags: needinfo?(cornel.ionce)

It seems this issue is related to the WebRender indeed. It does not reproduce after force disabling the WebRender.

Flags: needinfo?(cornel.ionce)
Component: Printing → Graphics: WebRender
Product: Toolkit → Core
Severity: S4 → --
Priority: P2 → --

Cool, I'll take it out of the print2020 list, then. :)

Whiteboard: [print2020_v83][old-ui-]
Blocks: wr-linux
Severity: -- → S3

Gnome Xwayland, Debian Testing, Intel HD Graphics 630 (KBL GT2)
The dropdown is a WebRender window.
mozregression --launch 20200825094622 --pref gfx.webrender.all:true gfx.webrender.debug.new-frame-indicator:true -a https://example.com

Also noticed: The drowndown is entirely frozen for a second until the highlight background is removed from the dropdown button, you can't hover (highlight) the other entry in this period.

No longer blocks: 133787, 1658287
Has Regression Range: yes → ---
Keywords: regression
No longer regressed by: 1653389
See Also: → 1656211
Summary: [Ubuntu] Intermittent UI glitch causing the Print preview "pages" dropdown to be overlapped → Intermittent UI glitch causing the Print preview "pages" dropdown to be overlapped
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