Re: i386/1403: Intel 440BX2 mobo doesn't power off on halt -p

[Stephan Somogyi <obsd-bug@gyroscope.net>]

This is a follow up to my report of September 12th.

I have recently installed a more recent version of the Intel BIOS for 
this motherboard. The new version is P13-0014S, as downloaded from 
<http://support.micronpc.com/apps/SpecDriv.ASP?HUB=MBD001109-xx&include=>

Even with the new BIOS, this machine will not power down on 'halt -p' 
and instead hangs (requiring the power cord to be pulled) after 
printing "Attempting to power down..." to the console.

Based on Dimitar Stoikov's comment that his Phoenix BIOS for the same 
mobo powered down fine but had APM disabled, I disabled Power 
Management in the Intel BIOS setup just to see what would happen. 
Interestingly enough, instead of hanging, there is a slight pause 
after "Attempting to power down..." and then the message "The 
operating system has halted. Please press any key to reboot." is 
printed. The machine does not power down.

Therefore, it looks like I've isolated this problem to an adverse 
interaction between the apm code in 2.8-current (GENERIC, dated Sept 
30) and the Intel BIOS for this mobo.

Please advise on how best to proceed further. I would very much like 
it if this could be fixed for 2.8.

s.