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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Screen flickering when connected external monitor"
href="https://bugs.freedesktop.org/show_bug.cgi?id=100767">100767</a>
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<th>Summary</th>
<td>Screen flickering when connected external monitor
</td>
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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>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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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
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<th>Reporter</th>
<td>admin@yankun.org
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>After upgrade kernel v4.6+
I can't use my external monitor any more.
it will cause screen flickering every time when I try to connect it.
Not only the monitor, but also the projector, I think it should be same way.
My laptop is Lenovo T450s
OS: Fedora 25
Kernel: 4.10.10-200.fc25.x86_64
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09)
(prog-if 00 [VGA controller])
Subsystem: Lenovo Device 5036
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at e0000000 (64-bit, non-prefetchable) [size=16M]
Memory at c0000000 (64-bit, prefetchable) [size=512M]
I/O ports at 3000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
I tried to add kernel parameters, but not work
(i915.enable_psr=0 (or 1 or 2))</pre>
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