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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - R9-270 has no video output when underclocked"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94502">94502</a>
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<th>Summary</th>
<td>R9-270 has no video output when underclocked
</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>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/Radeon
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>maweki@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>I have a Radeon R9-270 and I am running Fedora 23 with the default OpenSource
drivers supplied with the repository.
Yesterday I did an Update from Kernel 4.3.3-300 to 4.4.3-300 and I started
seeing some issues. When I do nothing for about 12 seconds the screens (dual
head) turn blank. Moving the mouse makes the screen go back on again. Sometimes
the login-screen of the gnome-shell or chrome are frozen but the system as a
whole seems fine.
During normal operations /sys/kernel/debug/dri/0/radeon_pm_info is the
following:
power level 0 sclk: 30000 mclk: 120000 vddc: 950 vddci: 1000 pcie gen: 2
When the screen is still for a bit (exactly when it turns blank) the output is
power level 0 sclk: 30000 mclk: 15000 vddc: 900 vddci: 850 pcie gen: 2
So apparently, when the video card is clocked down, the output is deactivated.
My current "workaround" is running videos on the side - not an ideal solution.</pre>
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