Safe-mode on amd64 broken
mav at FreeBSD.org
Wed Sep 29 10:41:15 UTC 2010
David Naylor wrote:
> Trying to boot a recent (sep 23) amd64 kernel in safe-mode fails with ``panic:
> No usable event timer found!''. This occurs on two (all my) machines. This
> has been a persistent problem since the introduction of the event timer code.
I've reproduced the problem.
The reason is that all (or at least most) of devices (both PCI and ISA),
including only available in that mode i8254 and RTC timers, failed to
allocate their interrupts. While reported message is indeed related to
event timer code, problem IMHO doesn't. While without this panic system
could boot without any alive timer, I have doubts that it would be
functional without timers, USB, network and disk controllers.
Problems seems to be the same if I am trying to boot without ACPI.
More information about the freebsd-current