Bug 255489

Summary: REGRESSION(2.41.2): [GTK] Flickering on cnn.com
Product: WebKit Reporter: Michael Catanzaro <mcatanzaro>
Component: WebKitGTKAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: bugs-noreply, kdwkleung, mcatanzaro
Priority: P2    
Version: WebKit Nightly Build   
Hardware: PC   
OS: Linux   
See Also: https://bugs.webkit.org/show_bug.cgi?id=255082
Attachments:
Description Flags
Screencast
none
Screencast
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Another screencast none

Michael Catanzaro
Reported 2023-04-15 11:18:55 PDT
Created attachment 465936 [details] Screencast Since 2.41.2, images flicker on cnn.com. See attached video. This is different from bug #253807 because (a) I have not manually upranked gst-va, and (b) this did not occur prior to 2.41.2.
Attachments
Screencast (5.64 MB, video/webm)
2023-04-15 11:18 PDT, Michael Catanzaro 		no flags
Details
Screencast (1.33 MB, video/webm)
2023-04-16 06:30 PDT, Michael Catanzaro 		no flags
Details
Another screencast (2.35 MB, video/webm)
2023-04-16 06:31 PDT, Michael Catanzaro 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Kdwk
Comment 1 2023-04-16 02:30:22 PDT
I am unable to reproduce this issue. Tested on WebKitGTK 2.41.2/ Epiphany Technology Preview
Michael Catanzaro
Comment 2 2023-04-16 06:30:20 PDT
OK, it's not just images. Another screenshot attached: this time, a chunk of the headlines are flickering.
Michael Catanzaro
Comment 3 2023-04-16 06:30:46 PDT
Created attachment 465938 [details] Screencast
Michael Catanzaro
Comment 4 2023-04-16 06:31:28 PDT
Created attachment 465939 [details] Another screencast And now the entire web view is flickering
Michael Catanzaro
Comment 5 2023-04-17 08:17:34 PDT
I can no longer reproduce this today, after reverting the change from bug #255082. It seems truly incredible that this flickering could be caused by a font size calculation change, but the bug was pretty severe yesterday and gone today, and there's been only one change, and we know it caused spectacular rendering errors on reddit to, so... there we have it.
Michael Catanzaro
Comment 6 2023-04-17 08:17:41 PDT
*** This bug has been marked as a duplicate of bug 255488 ***
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