[Bug 111623] No package C-states on Dell XPS 15 9570 after resume from deep sleep

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111623

s.zharkoff at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 OS|All                         |Linux (All)
            Version|XOrg git                    |DRI git
           Hardware|Other                       |x86-64 (AMD64)

--- Comment #1 from s.zharkoff at gmail.com ---
Movig the bug from kernel bugzilla
https://bugzilla.kernel.org/show_bug.cgi?id=204751

Kernel 5.2 series - suspend, resume - package enter c-states up to C10.
Kernel 5.3 starting from 5.3-rc1 till latest drm-tip builds - states up to C10
before suspend, no package C-states after resume. 

Zhang Rui:

before suspend
CPU%c7  CoreTmp PkgTmp  GFX%rc6 GFXMHz  Totl%C0 Any%C0  GFX%C0
99.40   38      38      99.85   350     1.29    0.79    0.14
after resume
CPU%c7  CoreTmp PkgTmp  GFX%rc6 GFXMHz  Totl%C0 Any%C0  GFX%C0
99.49   39      39      1.32    350     1.21    1.00    95.04

It is graphics that blocks cpu from entering package c-state.
Please file a bug at freedesktop.org and attach the full dmesg output with
kernel parameter drm.debug=0xe, after the problem reproduced.

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