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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - 915][HSW] Haswell-Core-I5-4210U notebook display doesn't flicker only with i915.modeset=0"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110798">110798</a>
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<th>Summary</th>
<td>915][HSW] Haswell-Core-I5-4210U notebook display doesn't flicker only with i915.modeset=0
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<th>Product</th>
<td>Mesa
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<th>Version</th>
<td>unspecified
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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
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<th>Severity</th>
<td>critical
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/DRI/i965
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<th>Assignee</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>altsyde@gmail.com
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=144383" name="attach_144383" title="Demonstration of flickering on right corner of the screen">attachment 144383</a> <a href="attachment.cgi?id=144383&action=edit" title="Demonstration of flickering on right corner of the screen">[details]</a></span>
Demonstration of flickering on right corner of the screen
I have notebook HP Elitebook Folio 1040 G1 which comes with processor Intel
i5-4210U.
I have few types of periodic flickering which happens only on Linux (I don't
see it on Windows or BIOS).
1) If I leave mouse cursor for few seconds, then start to moving it, there's
slight flicker (like display brightness changes a little)
2) On the top left corner sometimes appears artifacts (see attached video).
They mostly reproduceable if you have black panel or window decoration on top.
I tried different distros and DEs:
* Ubuntu MATE 16.04 (kernel 4.4), xUbuntu 18.04 (kernel 4.15 and 5.0), Fedora
30 with GNOME Wayland, KDE Neon with Plasma 5.15 on XOrg.
Each of them suffer from this issue.
I tried different GRUB options: i915.enable_rc6=0 ; i915.enable_psr=0 ;
i915.i915_enable_fbc=1.
Also tried all available Refresh Rates (from 40HZ to 120 HZ) and resolutions.
Problem completely stopped at the last measure - i915.modeset=0
For now I can't test external monitor as this notebook only have DisplayPort
---
It's possible that problem is fixable by replacing display matrix but the fact
that on Windows I can't see any artifacts or flickering worries me.
Please tell which additional logs or system info I can provide
Regards,
Evgen</pre>
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