Re: ACPI/APM suspend errors related to yds

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

On Thu, 31 Jul 2008 18:28:52 +0200
Joerg Sonnenberger <joerg%britannica.bec.de@localhost> wrote:

> On Thu, Jul 31, 2008 at 12:27:20PM -0400, Steven M. Bellovin wrote:
> > I build a DIAGNOSTIC kernel from yesterday's source, since I already
> > had a full build lying around.  Running single-user, I tried
> > 
> >     sysctl -w machdep.sleep_state=3
> > 
> > and it hung.  I realized I hadn't turned off one CPU, so I tried
> > that, but 'cpuctl offline 1' hung.
> 
> Known issue. The recent changes from rmind made it work better, but it
> still fails when cpuctl is running on the CPU it tries to offline (I
> think).
> 
Is there a work-around?  Is there a way to suspend a dual-core system
without that? 



                --Steve Bellovin, http://www.cs.columbia.edu/~smb