[Webkit-unassigned] [Bug 163484] New: [gtk] [wayland] Epiphany starts with a lot of video glitches

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163484

            Bug ID: 163484
           Summary: [gtk] [wayland] Epiphany starts with a lot of video
                    glitches
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: marciosr10 at gmail.com
                CC: bugs-noreply at webkitgtk.org

Created attachment 291713
  --> https://bugs.webkit.org/attachment.cgi?id=291713&action=review
lsmod, lspci and installed packages

When I start epiphany 3.22.1 under wayland there are a lot of video glitches that make impossible to see the window content.

Using the flag GDK_BACKEND=x11 that bug do not happens.
That bug is happen on a desktop with a radeon rx 480 with fully update open source stack, mesa, amdgpu, kernel 4.8, gtk 3.22.1 and webkit2gtk 2.14.1.
It not happens on a notebook ivybridge with intel video driver.
Using the flag GDK_GL=disable just the webview shows that glitches.

I'm using fully updated Arch Linux.

There isn't backtrace on gdb.

Step to reproduce:

1 - open epiphany on gnome 3.22 wayland on amdgpu stack;

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