Re: Zotac ZBOX nano

[ssartor <ssartor%bellatlantic.net@localhost>]

Thanks for the pointer!  I disabled ‘Monitor M-Wait’ in the bios and the machine now boots with all 4 cores!

Steve

> On Jun 26, 2018, at 21:04, maya%netbsd.org@localhost wrote:
> 
> For context:
> https://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/pentium-celeron-n-series-j-series-datasheet-spec-update.pdf
> 
> APL30 A Store Instruction May Not Wake up MWAIT
> Problem: 
> One use of the MONITOR/MWAIT instruction pair is to allow a logical processor to wait 
> in a sleep state until a store to the armed address range occurs. Due to this erratum, 
> stores to the armed address range may not trigger MWAIT to resume execution.
> Implication : 
> The logical processor that executed the MWAIT instruction may not resume execution 
> until it receives an interrupt. Software that does not rely on stores to the armed 
> address range to wake a logical processor from an MWAIT sleep state is not affected 
> by this erratum.
> Workaround :  
> Software needs to use interrupts to wake processors from MWAIT-induced sleep states.
> 
> I got the hint from a reddit comment:
> https://www.reddit.com/r/PFSENSE/comments/76qag8/240_not_booting_due_to_hpet/dogx84x/
> 
> It says you can turn it off in BIOS too, if you don't feel like changing
> the kernel.
>