[Bug 111594] [guc/huc] 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

--- Comment #20 from Don Hiatt <don.hiatt at intel.com> ---
(In reply to kitestramuort from comment #19)
> (In reply to Don Hiatt from comment #17)
> > What value of guc_enable are you giving? Also, this is what it looks like on
> > KBL with drm-tip with the proper firmware.
> > 
> > [  213.513852] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin
> > (v1.4)
> > [  213.573467] [drm] GuC communication enabled
> > [  213.578063] i915 0000:00:02.0: GuC firmware i915/kbl_guc_33.0.0.bin
> > version 33.0 submission:disabled
> > [  213.578065] i915 0000:00:02.0: HuC firmware i915/kbl_huc_4.0.0.bin
> > version 4.0 authenticated:yes
> > [  213.579030] [drm] Initialized i915 1.6.0 20191007 for 0000:00:02.0 on
> > minor 0
> > [  213.581581] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
> 
> I'm on the current stable kernel, 5.3.8. enable_guc is -1, which on this
> platform should be equivalent to 2. 5.3 only accepts guc 32.0.3 and huc 02
> 
> [drm] HuC: Loaded firmware i915/kbl_huc_ver02_00_1810.bin (version 2.0)
> [  116.266798] [drm] GuC: Loaded firmware i915/kbl_guc_32.0.3.bin (version
> 32.0)
> [  116.266967] i915 0000:00:02.0: GuC firmware version 32.0
> [  116.266968] i915 0000:00:02.0: GuC submission disabled
> [  116.266969] i915 0000:00:02.0: HuC enabled

Yes, enable_guc = -1 is equivalent to 2. That said, I've been debugging this
issue with drmtip and the latest firmware. So that seems to be the reason it is
working for others and not you. BTW, just to confirm, you did apply the patch?

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