Revert "x86: default to reboot via ACPI"
This reverts commit c7ffa6c2. the assumptio of this change was that this would not break any existing machine. Andrey Borzenkov reported troubles with the ACPI reboot method: the system would hang on reboot, necessiating a power cycle. Probably more systems are affected as well. Also, there are patches queued up for v2.6.29 to disable virtualization on emergency_restart() - which was the original motivation of this change. Reported-by: NAndrey Borzenkov <arvidjaar@mail.ru> Bisected-by: NAndrey Borzenkov <arvidjaar@mail.ru> Signed-off-by: NEduardo Habkost <ehabkost@redhat.com> Acked-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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