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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [ILK] [v4.5-rc1] FIFO underrun and flickering screen on cursor hide"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93945">93945</a>
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<th>Summary</th>
<td>[ILK] [v4.5-rc1] FIFO underrun and flickering screen on cursor hide
</td>
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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)
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<th>OS</th>
<td>Linux (All)
</td>
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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
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>peter@lekensteyn.nl
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<div>
<pre>Since upgrading the kernel from v4.3 to v4.5-rc1-28-g03c21cb on a laptop
running Arch Linux (i5-560M), I experience a flickering screen when the cursor
is hidden. This happens on both the internal LVDS panel and an external HDMI
monitor.
Example dmesg lines:
[ 192.695484] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU
pipe A FIFO underrun
[ 192.696897] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun
Steps to reproduce:
1. Open Konsole (from KDE).
2. Press Ctrl (cursor is hidden).
3. Observe flickering screen (first occurrence, e.g. after suspend also
results in dmesg entries).
4. Move the pointer to make it visible again, possible repeating step 2 if 3
did not happen.
Alternative steps to reproduce:
1. Have two monitors connected (internal LVDS and external HDMI).
2. Move the mouse between them (back and forth).
3. Observe a flickering screen on the monitor where the cursor left.</pre>
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