[coreboot] [HELP!!!] Pavilion EC (similar to compal/ene932) and its woes

mrnuke mr.nuke.me at gmail.com
Sat Apr 5 19:02:24 CEST 2014

So, in messing with this Pavilion m6_1935dx, I was able to get most of the EC 
running as expected. It seems that, at least the (ACPI) register layout is the 
same. We can get good battery _and_ AC indicators from it.

When we query the EC (say, doing a cat /sys/class/power/AC/online), it 
responds properly with an SCI whenever the status register changes, and the 
query goes well. And that's about it.

When an event happens, on the other hand, like a hotkey, or AC is removed, it 
does not generate an SCI that would lead to a query call (_Qxx). Instead it 
spits out an SMI. I know for a fact that the SCI and SMI GPEs are where we 
expect them to be.

I see google/parrot uses the same physical EC silicon, though the EC firmware 
may be a different beast. However, I'd like to ask of you gurus who have 
worked on parrot... what's your take on this?


More technical details:
I've made ACPI print a debug message whenever GPE23 is triggered (_L17). This 
is the EC SMI event.

I'm also using linux supermagic to get an idea of what is going on:

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