bisected to e978aa7d7d57d04eb5f88a7507c4fb98577def77

cannot revert the commit cleanly to further test

attaching pm-suspend log.  /proc/cpuinfo and lspci -vvnn just in case. 
If more info is needed, please let me know.

thanks!
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when trying to suspend... the system locks right before suspending.
sysrq keys  will not work at this point


please include me in the CC since im not subscribed to the list.

i CCed everyone mentioned in the commit. if you were CCed by mystake, sorry.