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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 - PSR - screen freezes when sound controller power saving is enabled"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91437">91437</a>
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<th>Summary</th>
<td>PSR - screen freezes when sound controller power saving is 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>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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>
</tr>
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<th>Reporter</th>
<td>ivan.mitev@gmail.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=117313" name="attach_117313" title="tar.gz with all relevant dmesg and laptop specs">attachment 117313</a> <a href="attachment.cgi?id=117313&action=edit" title="tar.gz with all relevant dmesg and laptop specs">[details]</a></span>
tar.gz with all relevant dmesg and laptop specs
With PSR enabled, FBC=0, laptop undocked (on AC), the screen goes blank in X
(but not in console) when the sound controller power saving is enabled
(/sys/module/snd_hda_intel/parameters/power_save = Y)
(I hit <a class="bz_bug_link
bz_status_NEW "
title="NEW - PSR screen freeze after modesetting"
href="show_bug.cgi?id=91436">bug 91436</a> but a suspend-resume cycle allows to continue to work with the
laptop and do further tests)
A- with snd power saving not configured ("N") when switching to battery,
everything's OK. (see folder boot-undocked_ac_fbc0_psr1-hdaN in attached tgz).
B- with snd power saving configured ("Y") when switching to battery, the screen
goes blank when I'm in X, but not when I'm in a console. See folder
boot-undocked_ac_fbc0_psr1-hdaY in attached tgz:
1-boot_freezeatprompt (<a class="bz_bug_link
bz_status_NEW "
title="NEW - PSR screen freeze after modesetting"
href="show_bug.cgi?id=91436">bug 91436</a>)
2-after_suspendresume_cycle (workaround to get a functional display)
3-bat-on-console-hdaY (switch to battery when in console)
4-ac-console (switch to AC when in console)
5-bat-X-hdaY (switch to battery when in Xorg)
6-suspend_resume_cycle-still_blank (tried suspend/resume workaround but still
blank)
7-movetoconsole_suspendresumecycle-still_blank (switch to console, another
suspend/resume cycle test, but still blank).
Hardware: lenovo T450s, model 20BX000TBM (see attached dmidecode and lspci_vv).
OS: Fedora 22, fully updated (as of 2015-07-23)
Kernel: git drm-intel-nightly (as of 2015-07-22 evening). .config attached
(config.drm-intel).
Xorg:
- xorg-x11-server-Xorg-1.17.2-1.fc22.x86_64
- xorg-x11-drv-intel-2.99.917-12.20150615.fc22.x86_64
- mesa-dri-drivers-10.6.1-1.20150629.fc22.x86_64
(sorry to attach a tar.gz, too many files to attach).</pre>
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