Bug 216220

Summary: Gaps in gradient background when resizing page
Product: WebKit Reporter: Ricci Adams <webkit.org>
Component: CSSAssignee: Nobody <webkit-unassigned>
Status: RESOLVED MOVED    
Severity: Major CC: simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: Safari 13   
Hardware: Mac   
OS: macOS 10.15   
Attachments:
Description Flags
Video of rendering issue
none
Test HTML file
none
Video of rendering issue
none
System Information none

Ricci Adams
Reported 2020-09-05 17:18:40 PDT
Created attachment 408106 [details] Video of rendering issue Visible gaps appear in a div styled with `background: linear-gradient(…)` when resizing the page or when the page becomes inactive. This appears to be some kind of optimization gone wrong. See attached HTML file and screen recording.
Attachments
Video of rendering issue (858.04 KB, video/quicktime)
2020-09-05 17:18 PDT, Ricci Adams 		no flags
Details
Test HTML file (770 bytes, text/html)
2020-09-05 17:19 PDT, Ricci Adams 		no flags
Details
Video of rendering issue (4.92 MB, application/octet-stream)
2020-09-05 17:21 PDT, Ricci Adams 		no flags
Details
System Information (5.36 MB, application/octet-stream)
2020-09-05 17:22 PDT, Ricci Adams 		no flags
Details
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.
Ricci Adams
Comment 1 2020-09-05 17:19:03 PDT
Created attachment 408107 [details] Test HTML file
Ricci Adams
Comment 2 2020-09-05 17:21:34 PDT
Created attachment 408108 [details] Video of rendering issue
Ricci Adams
Comment 3 2020-09-05 17:22:48 PDT
Created attachment 408109 [details] System Information
Radar WebKit Bug Importer
Comment 4 2020-09-08 09:58:14 PDT
<rdar://problem/68514057>
Alexey Proskuryakov
Comment 5 2020-09-08 09:59:38 PDT
I cannot reproduce this with Safari 14 beta on a 16" Mac Book Pro.
Simon Fraser (smfr)
Comment 6 2020-09-08 10:31:15 PDT
This is a GPU driver bug. It's being tracked internally.
Ricci Adams
Comment 7 2020-09-08 14:29:56 PDT
Simon - are there any workarounds or can it be revealed which GPUs are affected? Thanks!
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