Is possible to get an error state of this??

Luis, are you still reproducing this with drm-tip on recent CNL?

If so, could also try without i915 loaded to see if i915 is a suitable culprit or not?

With the provided logs, and description, and on unstable pre-prod machine it is so hard to blame i915.

But if you remove i915 out of picture and suspend/resume starts magically working than it is our fault for sure.

Thanks,
Rodrigo.

First of all. Sorry about spam.
This is mass update for our bugs. 

Sorry if you feel this annoying but with this trying to understand if bug still valid or not.
If bug investigation still in progress, please ignore this and I apologize!

If you think this is not anymore valid, please comment to the bug that can be closed.
If you haven't tested with our latest pre-upstream tree(drm-tip), can you do that also to see if issue is valid there still and if you cannot see issue there, please comment to the bug.

I did as follow:

1 - Send platform to freeze state by doing:
     # echo freeze > /sys/power/state
2 - Press power button. It returns properly, no hangs on dmesg, no errors with PM:
     gfx@gfx-desktop:~$ dmesg | grep -i pm:
         [   57.123872] PM: suspend entry (s2idle)
         [   57.123875] PM: Syncing filesystems ...
         [  160.341653] PM: suspend exit
     gfx@gfx-desktop:~$

Though if I press any key in the keyboard the platform won't wake up, only when the power button is pressed. If freeze state is supposed to work that way, then this bug can be closed.

======================================
             Software
======================================
kernel version              : 4.16.0-mainline-4.16
hostname                    : gfx-desktop
architecture                : x86_64
os version                  : Ubuntu 17.10
os codename                 : artful
[sudo] password for gfx: kernel driver               : i915
bios revision               : 124.2
bios release date           : 02/05/2018
ksc                         : 1.36
hardware acceleration       : disabled
swap partition              : enabled on (/dev/nvme0n1p2)

======================================
        Graphic drivers
======================================
mesa                        : 18.0.0 (git-dceb1ce807
libdrm                      : 2.4.91
cairo                       : 1.14.10

======================================
             Hardware
======================================
motherboard model          : CannonLakeClientPlatform
motherboard id             : CannonLakeYLPDDR4RVP
form factor                : Laptop
manufacturer               : IntelCorporation
cpu family                 : Other
cpu family id              : 6
cpu information            : Genuine Intel(R) CPU 0000 @ 1.10GHz
gpu card                   : Intel Corporation Device 5a41 (rev 04) (prog-if 00 [VGA controller])
memory ram                 : 7.63 GB
max memory ram             : 8 GB
display resolution         : 1600x900
cpu thread                 : 4
cpu core                   : 2
cpu model                  : 102
cpu stepping               : 3
socket                     : Other
current cd clock frequency : 336000 kHz
maximum cd clock frequency : 528000 kHz
displays connected         : HDMI-A-1

======================================
             Firmware
======================================
dmc fw loaded             : yes
dmc version               : 1.6
guc fw loaded             : fetch NONE, load NONE
guc version wanted        : wanted 0.0, found 0.0
guc version found         : wanted 0.0, found 0.0

======================================
             kernel parameters
======================================
splash drm.debug=0x1e i915.alpha_support=1 resume=/dev/sda2

CLosing, Imre, ok?

(In reply to Jani Saarinen from comment #5)
> CLosing, Imre, ok?

Yes, it doesn't seem like an i915 bug in any case, if wake-up with keyboard works. We need rtcwake functionality that could be still checked.