[Bug 93035] New: [SKL-Y] Can't reach deepest state than pc2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93035

            Bug ID: 93035
           Summary: [SKL-Y] Can't reach deepest state than pc2
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: christophe.prigent at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 119971
  --> https://bugs.freedesktop.org/attachment.cgi?id=119971&action=edit
report.html

Hardware
Platform: SKY LAKE Y A0 QUAL
CPU : Intel(R) Core(TM) M5-6Y54 @ 1.10GHz 4MB (family: 6, model: 78  stepping:
3)
MCP : SKL-Y  D1  
QDF : QJ9W
CPU : SKL D0
Chipset PCH: Sunrise Point LP C1       
CRB : SKY LAKE Y LPDDR3 RVP3 CRB FAB2
Reworks : All Mandatories + FBS02 & FBS03, O-06
Software 
Linux : Ubuntu 15.04 64 bits
BIOS : SKLSE2R1.R00.B104.B01.1511110114
ME FW : 11.0.0.1191
Ksc (EC FW): 1.20
Kernel 4.4.0-rc1 nighlty 0ffc902 from git://anongit.freedesktop.org/drm-intel
  commit 0ffc902f01780eea9bd497435f04883b1c071871
  Author: Daniel Vetter <daniel.vetter at ffwll.ch>
  Date:   Thu Nov 19 17:52:23 2015 +0100
  drm-intel-nightly: 2015y-11m-19d-16h-51m-40s UTC integration manifest
Mesa 11.0.5 from http://cgit.freedesktop.org/mesa/mesa/
xf86-video-intel - 2.99.917 from
http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/
Libdrm - 2.4.65 from http://cgit.freedesktop.org/mesa/drm/
Libva - 1.6.1 from http://cgit.freedesktop.org/libva/
vaapi intel-driver - 1.6.1 from http://cgit.freedesktop.org/vaapi/intel-driver
Cairo - 1.14.2 from http://cgit.freedesktop.org/cairo
Xorg Xserver - 1.17.2 from http://cgit.freedesktop.org/xorg/xserver

Steps:
------
1. Boot with kernel boot command line: i915.disable_power_well=1 
2. From Ubuntu Power settings, configure Turn screen off when inactive after 1
minute
3. Auto-tune the system using PowerTop, execute command:
sudo powertop --auto-tune
4. Turn off networks, disconnect devices (mouse, keyboard ...)
5. Launch PowerTop with command:
sudo powertop --html=report --time=240
6. Wait 4 minutes
7. Check PC states residency in html report

Actual result:
---------------
7. PC2 is 89.5% (deepest states are 0)

Expected result:
----------------
7. System can reach deepest states

PowerTop installation steps:
----------------------------
Install packages: g++, autopoint, libpci-dev, autoconf, libncurses,
libncurses-dev, libnl-cli, libnl-genl-dev, libtool
git clone git://github.com/fenrus75/powertop.git 
cd powertop
./configure
make
make install

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