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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW][i915][HD 4600] GPU preventing package state from fully reaching PC6"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88563">88563</a>
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<th>Summary</th>
<td>[HSW][i915][HD 4600] GPU preventing package state from fully reaching PC6
</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
</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/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>shawn.starr@rogers.com
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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
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<pre>I am unable to get processor package c-state to PC6 fully, upon testing various
things.
I have narrowed this down to the i915.
Here is my current cmdline for booting up laptop:
rhgb slub_debug=- cgroup_disable=memory console=tty0 console=ttyS0,115200n8
radeon.audio=0 snd_hda_intel.power_save=1 nmi_watchdog=0 i915.powersave=1
intel_iommu=on vfio_iommu_type1.allow_unsafe_interrupts=1 zswap.zpool=zsmalloc
zswap.enabled=1 radeon.backlight=0 video=eDP-1:d video=VGA-2:e video=VGA-1:d
video=VGA-1-0:d pcie_aspm=off i915.enable_rc6=1 i915.i915_enable_rc6=1
Kernels: 3.19-rc4 (stock), 3.19-rc4 (intel-drm-nightly) both show same result.
I can get the package state to PC7 by setting dpms force on VGA-2 output, then
we reach PC7 95%+ of time, upon wakeup it returns to PC2 state for majority of
sleep.
The GPU is reaching its own RC6 state 99% of time in my testing so that is
working fine.
Any tools I can use to see why it is preventing deeper PC sleep states?</pre>
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