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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - MacBook Pro retina 13 inch early 2013 jittery display"
href="https://bugs.freedesktop.org/show_bug.cgi?id=63981">63981</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>MacBook Pro retina 13 inch early 2013 jittery display
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>diddledan@gmail.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>7.7 (2011)
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr></table>
<p>
<div>
<pre>video of the effect here: <a href="http://www.youtube.com/watch?v=zSP2EIAkkJg">http://www.youtube.com/watch?v=zSP2EIAkkJg</a>
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.</pre>
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