On Mon, Feb 12, 2018 at 1:58 PM, Rafael J. Wysocki
[off-list ref] wrote:

On 2/12/2018 2:52 AM, Woody Suwalski wrote:

quoted

Howdy,
I have just tested 4.15.2 kernel on a 32-bit Thinkpad x60.
While hibernation works OK, suspend2ram fails on wakeup - system goes to
sleep OK, however upon wake it simply reboots.

I have bisected the problem to:

commit 62c00e6122a6b5aa7b1350023967a2d7a12b54c9
Author: William Grant [off-list ref]
Date:   Tue Jan 30 22:22:55 2018 +1100

    x86/mm: Fix overlap of i386 CPU_ENTRY_AREA with FIX_BTMAP

That would be commit 55f49fcb879fbeeb in the mainline.

quoted

Removing that patch makes the suspend work again (testing is painful
because this small patch triggers rebuild of virtually all kernel files :-(
)

Could there be something triggering it in my config file?

Yes, in theory.

Please create a BZ entry at bugzilla.kernel.org for this (let me know
the number of it) and attach the config to it.

Thanks,
Rafael