Deep sleep modes on 7-BETA locks up syscons

[Kevin Oberman]

> Date: Fri, 9 Nov 2007 09:14:03 +0100
> From: Simon Barner <barner at FreeBSD.org>
> 
> Kevin Oberman wrote:
> > I have already sent much of this to -current@, but ACPI is clearly
> > involved and I'll admit that I don't fully understand all of the
> > implications of sleep (Cx) states.
> > 
> > Recently I discovered that I could no longer boot up on battery. (As it
> > turned out, I could not shut down, either.) The boot proceeds to devd
> > which kicks off power_profile which resets the cx_state. I use
> > performance_cx_lowest="HIGH" and economy_cx_lowest="LOW" which drops
> > cx_state to C4 when on battery. 
> > 
> > States of C1 and C2 don't cause a problem and C3 and C4 do. (C4 is only
> > available when on battery.)
> > 
> > At that point things slow to a crawl. I have never had the patience to
> > see if it would ever finish the boot, but it took many minutes just to
> > start ipfw and load the rules. When anything made it to the screen, it
> > appeared several lines at a time.
> 
> As reported on -current, I used to have this problem, but it seems to
> have been fixed with the latest BIOS update (T61):
> 
> Before the BIOS update, C3 caused similar lock ups in syscons when
> running on battery (it did work in X). When on AC, there has never been
> any problem.
> 
> I made available some information (dmesg, kernel config, acpi dump,
> dev.cpu and hw.acpi sysctls) in the hope the provide something usefull.
> 
> http://people.freebsd.org/~barner/cx/

Thanks!

The symptoms are remarkably similar, but there are two differences which
my post did not make clear.

1. I just have to be at C3 and in a syscons to see the problem. It does
   no matter whether I am on battery or AC line.

2. I am running the latest available BIOS for my system. It is from
   Sept. 2006, but I just checked and it is the latest available.

The only win I see for APIC is that the audio gets its own IRQ. Hardly
worth the effort, though I could probably add hints to do at least some
separation of stuff on IRQ 16, pcib1, vgapci0, bge0, cbb0.

Thanks again for getting back to me on this.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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