CVSROOT: /cvs
Module name: src
Changes by: kette...@cvs.openbsd.org 2021/05/09 09:51:35
Modified files:
sys/dev/acpi : acpi.c
Log message:
Some x86 machines advertise the "hardware reduced" ACPI feature, advertise
S4 and S5 support, but fail to populate the SLEEP_CONTROL_REG and
SLEEP_STATUS_REG descriptions in the FADT. An example of such a machine
is the ASUS Zenbook 14 UM433DA. Any attempt to powerdown the machine
will result in a kernel crash. It turns out that using the legacy ACPI PM
registers works fine on this machien. So fall back on those registers
if SLEEP_CONTROL_REG and/or SLEEP_STATUS_REG aren't provided.
ok deraadt@, mpi@
