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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 - Regression: screen flashes with PSR enabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96916">96916</a>
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<th>Summary</th>
<td>Regression: screen flashes with PSR enabled
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>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
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>nine@detonation.org
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>david.weinehall@intel.com, intel-gfx-bugs@lists.freedesktop.org
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=125054" name="attach_125054" title="dmesg output">attachment 125054</a> <a href="attachment.cgi?id=125054&action=edit" title="dmesg output">[details]</a></span>
dmesg output
Since commit 9b58e352b463f2f096d699d47b1c4c57879b617f which enables PSR by
default on Haswell, my external screen flashes as long as the system is docked
and idle. Moving the mouse or compiling a kernel keeps the screen readable.
When it flashes it looks like it takes a single line of output and fills the
screen with this line. The issue goes away by adding i915.enable_psr=0 or
i915.enable_psr=2 to the kernel command line.
System Information
Manufacturer: LENOVO
Product Name: 20ANCTO1WW
Version: ThinkPad T440p
Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
Running openSUSE 13.2 and KDE.
<span class="quote">> cat /sys/kernel/debug/dri/0/i915_edp_psr_status^</span >
i915_edp_psr_status
Sink_Support: yes
Source_OK: yes
Enabled: yes
Active: yes
Busy frontbuffer bits: 0x000
Re-enable work scheduled: no
Main link in standby mode: yes
HW Enabled & Active bit: yes
Performance_Counter: 76716
Attaching dmesg output.</pre>
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