[Bug 94483] New: Severe screen flickering and tearing over VNC connections

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94483

            Bug ID: 94483
           Summary: Severe screen flickering and tearing over VNC
                    connections
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: da_audiophile at yahoo.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 122211
  --> https://bugs.freedesktop.org/attachment.cgi?id=122211&action=edit
screen grab of this bug over vnc

Details:
Upon connecting over vnc to an Xorg server (in this case running Kodi), the
resulting video flickers and tears quite severely.  An example screen grab of a
vnc session attached to illustrate what I am seeing is attached.  In the past
such connections have been very smooth and pleasant.  I see nothing diagnostic
in the output of dmesg nor in the output from my vncserver.  I can confirm the
behavior with both the x11vnc package and the x0vncserver supplied with
tigervnvc.

Glad to supply any diagnostic logs upon request.

Distro:
Arch Linux x86_64

Hardware:
Intel(R) Core(TM) i3-4130T with on board video.
Motherboard: MSI H97I AC (latest BIOS)

Video drivers and xorg version:
kernel version 4.4.5 and 4.3.6 both give this bug
xf86-video-intel 1:2.99.917+560+gd167280-1
libva-intel-driver 1.6.2-1
xorg-server 1.18.1-3

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