[Webkit-unassigned] [Bug 169116] New: [GTK] WebKit 2.14.5 - flickering using pdf plugin

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=169116

            Bug ID: 169116
           Summary: [GTK] WebKit 2.14.5 - flickering using pdf plugin
    Classification: Unclassified
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: oldregdata at km.ru
                CC: bugs-noreply at webkitgtk.org

Was first reported at https://bugzilla.gnome.org/show_bug.cgi?id=779505
Opening pdf files in Epiphany Powered by WebKit 2.14.5 results in flickering. running Epiphany with the environment variable WEBKIT_DISABLE_COMPOSITING_MODE=1 or the environment variable WEBKIT_FORCE_COMPOSITING_MODE=1 doesn't seem to change this. 

uname -a: 
Linux a17030302 4.9.11-1-ARCH #1 SMP PREEMPT Sun Feb 19 13:45:52 UTC 2017 x86_64 GNU/Linux

Versions:

webkit2gtk 2.14.5-1
Web 3.22.6
GNOME Document Viewer 3.22.1

lspci | grep VGA:
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (primary) (rev 0c)

Will be glad to provide further info!
Best wishes,

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