[Bug 111594] New: Deep Package C-states never reached after laptop screen is turned off

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111594

            Bug ID: 111594
           Summary: Deep Package C-states never reached after laptop
                    screen is turned off
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: not set
          Priority: not set
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: kitestramuort at autistici.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 145301
  --> https://bugs.freedesktop.org/attachment.cgi?id=145301&action=edit
dmesg

Hardware is a laptop with a Core i5 8250U and Intel GFX 620 running Coreboot. 

# turbostat --show Pkg%pc8
Pkg%pc8
80.72
80.72

# xset dpms force off

wait a minute or so, then turn the screen back on

# turbostat --show Pkg%pc8
Pkg%pc8
0.00
0.00

Powertop also confirms this. PC states 2 and below are never reached.

All 5.3.0-RCs have this, 5.2.x all work well.

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