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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Screen flickers - probably double buffered. [regresion]"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99087">99087</a>
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<th>Summary</th>
<td>Screen flickers - probably double buffered. [regresion]
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>XOrg git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>freedesktop_org@dlk.pl
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Redirected from: <a href="https://bugzilla.kernel.org/show_bug.cgi?id=187251">https://bugzilla.kernel.org/show_bug.cgi?id=187251</a>
Screen flicker so much that its hard to watch.
Looks like intel buffers do not set correctly and flickers between old and new
image.
OS: Arch linux
Problem exists for at least 3 months now.
Hardware: MSI GE72 2QC Apache
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5600 (rev 0a)
01:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 960M] (rev a2)
00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge - DMI (rev 0a)
00:01.0 PCI bridge: Intel Corporation Broadwell-U PCI Express x16 Controller
(rev 0a)
Running on intel drivers, on nvidia efect is the same because it's a hybrid so
intel still handle final render.
<a href="https://dl.dropboxusercontent.com/u/54627341/flicker/MOV_0006.mp4">https://dl.dropboxusercontent.com/u/54627341/flicker/MOV_0006.mp4</a>
You see that mostly on non-black parts.
My first guess was that it is backlight pwm problem, i did try that, but then i
saw some strange "ghosts" on screen, for example when image change, you still
see flickering old image:
<a href="https://dl.dropboxusercontent.com/u/54627341/flicker/MOV_20161107115931_TSV.mp4">https://dl.dropboxusercontent.com/u/54627341/flicker/MOV_20161107115931_TSV.mp4</a>
And it is horrible:
<a href="https://dl.dropboxusercontent.com/u/54627341/flicker/MOV_0009.mp4">https://dl.dropboxusercontent.com/u/54627341/flicker/MOV_0009.mp4</a>
<a href="https://dl.dropboxusercontent.com/u/54627341/flicker/MOV_20161107212024_TSV.mp4">https://dl.dropboxusercontent.com/u/54627341/flicker/MOV_20161107212024_TSV.mp4</a>
And the flicker speed and intensity change depending on laptop load.
It only flickers on laptop screen, external monitors normal.
Also it shows at boot 2 times:
[drm:intel_dp_start_link_train [i915]] *ERROR* failed to update link training
right before it starts to flicker</pre>
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