[Bug 63981] New: MacBook Pro retina 13 inch early 2013 jittery display

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63981

          Priority: medium
            Bug ID: 63981
          Assignee: chris at chris-wilson.co.uk
           Summary: MacBook Pro retina 13 inch early 2013 jittery display
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: diddledan at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: 7.7 (2011)
         Component: Driver/intel
           Product: xorg

video of the effect here: http://www.youtube.com/watch?v=zSP2EIAkkJg

running Ubuntu 13.04 updated as of ~4am friday morning (GMT).

`lspci -v` reports:

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Apple Inc. Device 0102
   Flags: bus master, fast devsel, latency 0, IRQ 46
   Memory at a0000000 (64-bit, non-prefetchable) [size=4M]
   Memory at 90000000 (64-bit, prefetchable) [size=256M]
   I/O ports at 2000 [size=64]
   Expansion ROM at <unassigned> [disabled]
   Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
   Capabilities: [d0] Power Management version 2
   Capabilities: [a4] PCI Advanced Features
   Kernel driver in use: i915

while the effect is visible (it appears to have subsided for now) I can stop it
reliably by placing my finger over the gap between the monitor hinge and the
f2/f3 buttons. Maybe related to the ambient light sensor (I don't know where
that's located, and it's a guess that that's what I'm affecting with my
finger).

at first I thought it was maybe related to load on the system but this appears
to be a misnomer. I also thought that network or ssd activity may be
influencing matters, but again this appears not so.

I'm at a loss as to explain why it was happening, or why now it isn't while I'm
reporting this bug, or whether it will return after a reboot.

OS X does not exhibit the erratic jittering that I've described and recorded
above. As such I concluded that the issue lies in the Linux+software domain
rather than hardware malfunction.

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