To summarize my earlier comments: All the below relates to
suspend/resume of 17.10.

Suspend/resume works fine if I boot with the 4.10-based Ubuntu kernel
from 17.04, or any 4.13 mainline kernel starting from 4.13.5 .

The mainline kernels from 4.13 through 4.13.4, upon which the Ubuntu
kernel is built, all suspend OK but have problems on resume-- the
machine comes up but wifi does not connect. Once that happens I cannot
reboot or shut down normally, only by holding the power button.

The mainline kernels from 4.13.5 to 4.13.11 resume OK.

The mainline kernels from 4.14.rc1 to 4.14.rc7 have issues on suspend
and cannot properly resume -- display does not come on and the machine
does not respond to ssh from elsewhere. Again I am forced to hold the
power button down for hard shutdown.

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https://bugs.launchpad.net/bugs/1726061

Title:
  Inspiron 5565 suspend issues after 17.10 upgrade

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