I tested this for a while to be sure of the results. It appears that
with the mainline kernel 4.13.0-041300rc1-generic resuming from
hibernate works perfectly without the need to add the "acpi_osi=Linux"
kernel boot parameter. It worked correctly and reliably 100% of the
times I tried it (even repeatedly without a full shutdown).
Instead, even with the (almost) latest 4.2.0-83 Ubuntu kernel, more
often than not resuming from hibernate produces a blank screen after
unlocking the hard disk (for dm-crypt), unless the "acpi_osi=Linux"
kernel boot parameter is used. I must also say that, in any case (even
with such added parameter), sometimes resuming is not 100% reliable
because some devices seems not to wake up correctly (it happened with
keyboard or touchpad in my case, a couple of times).
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-fixed-upstream
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https://bugs.launchpad.net/bugs/1701081
Title:
HP ProBook 450 G1, resume from hibernate does not work unless
acpi_osi=Linux boot parameter is used
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