[Webkit-unassigned] [Bug 159512] New: [GTK] White page when loaded tab is visited until it's hovered when AC mode is always on

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=159512

            Bug ID: 159512
           Summary: [GTK] White page when loaded tab is visited until it's
                    hovered when AC mode is always on
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: Gtk
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cgarcia at igalia.com
                CC: bugs-noreply at webkitgtk.org, yoon at igalia.com,
                    zan at falconsigh.net
            Blocks: 154066

This happens in ephy at startup when restoring tabs from a previous session. Tabs that are loaded in the background, are fully white when visited the first time, until a redrawn is forced, for example, moving the mouse over the view, or resizing the window. It doesn't always happen, so it looks like a sync issue between web and ui processes. When using the threaded compositor it happens more often. When AC is not forced to be always enabled, it never happens. It happens with 2.12 branch too, so it's not a recent regression, I think it has always happened.

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