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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915][HSW][PM] Unable to use GFX RC6 on Dell Precision M6800"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98979">98979</a>
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<th>Summary</th>
<td>[i915][HSW][PM] Unable to use GFX RC6 on Dell Precision M6800
</td>
</tr>
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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)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</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>shawn.starr@rogers.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>
<p>
<div>
<pre>Using the following kernel options:
BOOT_IMAGE=/boot/vmlinuz-4.9.0-rc7+
root=UUID=f834b05c-55f3-407b-9a63-fc6b04d4c845 ro rhgb slub_debug=-
cgroup_disable=memory console=tty0 console=ttyUSB0,9600n8 nmi_watchdog=0
audit=0 amdgpu.gartsize=8192 amdgpu.vm_size=16 amdgpu.powerplay=1
amdgpu.exp_hw_support=1 rd.driver.blacklist=radeon [video=eDP-1:d
video=VGA-1:e] resume=/dev/sda7 intel_iommu=igfx_off
the driver will not turn on RC6 GFX power saving state(s).
I've attached kernel dmesg with driver debug output.
Tests done:
1) Run w/o any video= options, same result
2) Disable Intel AMT completely, same result
3) Force RC6, does not enable in driver.
Kernel: Dec 1st build, Linux 4.9-rc7 + drm-next-4.10-wip merged in for AMDGPU
(hybrid graphics use).
Powertop / turbostat -d show no GFX stats reported.</pre>
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