1396816 - [W10] Artifacts left behind when the Download manager's width is resized

Status: NEW

(Core :: Graphics, defect, P2)

Description

[Ciprian Georgiu [:ciprian_georgiu], Release Desktop QA]

Attachment: issue - screencast.mp4

[Affected versions]:
- latest Nightly 57.0a1
- Beta 56.0b9
- RC 55.0.3

[Affected platforms]:
- Windows 10 x64

[Steps to reproduce]:
1. Launch Firefox.
2. Open Firefox's downloads manager. (Ctrl + J)
3. Change the width size of the download manager window.

[Expected result]:
- No artifacts are displayed while resizing the Download manager's width

[Actual result]:
- Artifacts are displayed while resizing the Download manager's width

[Regression range]:
- Last good revision: d29f84406483c721a13cf9a52936ecced0c5c98a
  First bad revision: c54c652af04c5a918610bc3d419250177a68b9f7
  Pushlog:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=d29f84406483c721a13cf9a52936ecced0c5c98a&tochange=c54c652af04c5a918610bc3d419250177a68b9f7

[Additional notes]:
- I was able to repro this on a a HiDPI monitor (Dell UHD-1 P2415Qb) and with different scaling levels e.g. 125%, 200%. It appears that this issue is still present if I Sign out and Sign in back in Windows 10. On Win 8.1 and Win 7 I'm not seeing this artifacts.
- on a low dpi monitor I cannot see this behavior

Comment 1

[Panos Astithas (he/him) [:past] (please ni?)]

This looks like  graphics bug to me, but I can't reproduce it on latest Nightly (Win10) on a Dell XPS 13. If we could narrow down further the regression range it would definitely help.

Comment 2

[Milan Sreckovic [:milan] (needinfo for best results)]

Jeff, invalidation problem?

Comment 3

[Liz Henry (:lizzard Please n-i to RyanVM, jcristau, or pascal)]

Too late for a fix in 57 since we are a few days away from release.

Comment 4

[Liz Henry (:lizzard Please n-i to RyanVM, jcristau, or pascal)]

Looks like this is on the graphics team's backlog at this point. Dropping this from regression triage.