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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 flicker in kernel 4.16, fine in 4.15"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106829">106829</a>
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<th>Summary</th>
<td>Screen flicker in kernel 4.16, fine in 4.15
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>henry.baldursson@gmail.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=140036" name="attach_140036" title="dmesg">attachment 140036</a> <a href="attachment.cgi?id=140036&action=edit" title="dmesg">[details]</a></span>
dmesg
-- system architecture: x86_64
-- kernel version: Linux version 4.16.13-1-ARCH (builduser@heftig-15406) (gcc
version 8.1.0 (GCC)) #1 SMP PREEMPT Thu May 31 23:29:29 UTC 2018
-- Linux distribution: Antergos (Arch clone)
-- Machine or mother board model: Lenovo Yoga 910, Core i7-7500U, HD Graphics
620
-- Display connector: Integral
-- Kernel command line params: quiet drm.debug=0x1e log_buf_len=1M
i915.enable_rc6=0 i915.enable_psr=0 i915.enable_guc_loading=1
i915.enable_guc_submission=1
(most of those are as a result of me trying to fix this on my own)
I've waited for this to clear up, but it hasn't so either my system is
misconfigured or I'm running into a bug.
The error logged is this: [drm:intel_cpu_fifo_underrun_irq_handler [i915]]
*ERROR* CPU pipe A FIFO underrun
Here's a GIF of what I'm seeing:
<a href="https://gfycat.com/UnsightlyWellinformedAlligator">https://gfycat.com/UnsightlyWellinformedAlligator</a>
I'm running Wayland 1.15.0, Gnome 3.28.2, GDM 3.28.1.
As soon as I boot a 4.16 kernel the screen starts flickering. Downgrading to
4.15.11 fixes it right up.
I can't dump vbios as I get an Input/Output error. Never messed with that
before so no idea if related.
== dmesg (also attached): <a href="https://pastebin.com/JkQsCmLs">https://pastebin.com/JkQsCmLs</a>
== intel_reg dump: <a href="https://pastebin.com/PjQsYQFp">https://pastebin.com/PjQsYQFp</a>
Any ideas?</pre>
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