[Bug 104216] New: Firefox quirks (black and/or white squares)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104216

            Bug ID: 104216
           Summary: Firefox quirks (black and/or white squares)
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/AMDgpu
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: germano.massullo at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 136090
  --> https://bugs.freedesktop.org/attachment.cgi?id=136090&action=edit
screenshot 1

Firefox has several quirks showing black and/or white squares. The bug is
actually reproducible, but not in a deterministic way. I mean, if I will reboot
the system or restart Firefox, I am not sure when it will happen again.

This bugreport is probably a duplicated of
https://bugs.freedesktop.org/show_bug.cgi?id=103699

but the important thing is that the affected VGA is an AMD RX480 (AMDGPU
driver) rather than an Intel.
I decided to open a separate bugreport once #radeon fredrikh user noticed that
the patch
https://lists.x.org/archives/xorg-devel/2017-November/055344.html
that should fix
https://bugs.freedesktop.org/show_bug.cgi?id=103699
is for Intel only.

OS: Fedora 27
xorg-x11-server-Xorg-1.19.5-1.fc27.x86_64
kernel 4.13.16-302.fc27.x86_64
Mesa 17.2.4

# lspci -k | grep -iA 3 vga
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Ellesmere [Radeon RX 470/480/570/580] (rev c7)
        Subsystem: XFX Pine Group Inc. Radeon RX 480
        Kernel driver in use: amdgpu
        Kernel modules: amdgpu

Attached screenshots from my Firefox bugreport
https://bugzilla.mozilla.org/show_bug.cgi?id=1421353

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