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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Enabled PSR causes system lockups after screen was disabled (DELL XPS 13, Broadwell-U)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97602">97602</a>
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<th>Summary</th>
<td>Enabled PSR causes system lockups after screen was disabled (DELL XPS 13, Broadwell-U)
</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)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>critical
</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>linux@brodo.de
</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>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Since commit 9b58e352b463f2f096d699d47b1c4c57879b617f up to v4.8-rc5, my DELL
XPS 13 experiences lock-ups whenever the screen is re-enabled after having been
disabled by power management. Suspend-resume works fine.
Further data points: i915.enable_psr=0 works fine. i915.enable_psr=2 causes
screen flickering, i915.enable_psr=3 also shows the buggy behavior.
With i915.enable_psr=0 the output of
/sys/kernel/debug/dri/0/i915_edp_psr_status is:
Sink_Support: yes
Source_OK: no
Enabled: no
Active: no
Busy frontbuffer bits: 0x000
Re-enable work scheduled: no
Main link in standby mode: no
HW Enabled & Active bit: no
Performance_Counter: 0
This is on a DELL XPS 13, Debian Jessie (running Gnome), with the lspci -vvv
snippet:
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated
Graphics (rev 09) (prog-if 00 [VGA controller])
Subsystem: Dell Device 0665
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 42
Region 0: Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
Region 4: I/O ports at f000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: i915
Oh, and the bug reported yesterday (concerning commit 1c80c25fb6) to the
mailing lists is unrelated to this bug.
Best,
Dominik</pre>
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