On Thu, Dec 04, 2008 at 03:42:51AM -0800, Unga wrote: > --- On Tue, 12/2/08, Unga <[EMAIL PROTECTED]> wrote: > > > From: Unga <[EMAIL PROTECTED]> > > Subject: FreeBSD cannot power down > > To: email@example.com > > Date: Tuesday, December 2, 2008, 11:22 PM > > Hi all > > > > After a kernel recompilation on i386 RELENG_7 (not the > > latest), I cannot power down the machine. > > > > kldstat shows acpi.ko is loaded. > > > > It used to switch off but now the "shutdown -p > > now" halts the system with following messages: > > The operating system has halted. > > Please press any key to reboot. > > > > What else could I check to identify the cause? > > > > Appreciate your ideas on this. > > > > I had a look at source code. The program flow seems to be is as follows: > > shutdown => (signals) init => reboot() => boot() => shutdown_final => > shutdown_halt() => cpu_halt() > > I did not see which function is called to request a power down. > > The __asm__ ("hlt") doesn't power down, isn't it? > > Could you guys help me to identify how shutdown request a power down. >
HLT is just an old power-saving instruction that was traditionally run in the idle loop. From reading the code it looks like the system should be powered off during poweroff_wait but I can't see where ACPI is told to remove power. You might get more help by asking on the freebsd-acpi list. -- Bruce Cran _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"