> Ok, I do not know all these windows internals, but it would be cool to > check if WMI event is really received with correct mask in that NEVT > method. No idea if this is possible to debug/test on windows... That was my first idea after analyzing the NEVT method, but after skimming through the AMLI Debugger and KD docs, I got the impression that setting up an ACPI debugging session in Windows is so much of a hassle [1] for someone with no experience in Windows kernel-mode debugging that I'd rather hack the hell out of the DSDT in Linux and get on with my life. > > Well, here's the catch: there is no PNP0C09 device in the DSDT and thus > > the EC driver isn't even loaded in Linux and I can't dump EC registers. > > Yet Windows tools seem to be able to do it, using ports 0x66/0x62. I'm > > confused. > > > > Hm... could be this reason? And windows read pressed hotkeys from EC > registers? > > Can you ask acpi guys what could *not* work if acpi ec driver is not > loaded? Maybe I am missing something here, but even if the above turns out to be the case, how would such knowledge help in solving the issue? Suppose we learn that some magic command needs to be sent to the EC to enable event reporting via WMI, but we cannot do that as the kernel doesn't even see the EC. If I'm reading the DSDT dump correctly, it seems the Vostro V131 makes heavy use of SMIs. \SB.SMII is an alias for the 0xB2 I/O port, which is written to by the WMI and SXX6 methods. A call to the latter is made inside ECG1 (from SX11, specifically). IOW, an SMI is generated to get the event code. My guess would be that some magic SMI has to be generated if events are to be reported via WMI or something among the lines. Which gets us back to hearing from Dell as trying random values doesn't sound like a sane thing to do. [1] Another Windows machine is needed, debugging over a network cable is only supported since Windows 8, the Vostro V131 doesn't have any Firewire or serial ports, so I'd need to buy a USB debug cable, then get get my hands on a checked version of Acpi.sys and pray it all works. Now compare all that to recompiling the kernel with CONFIG_ACPI_CUSTOM_METHOD and CONFIG_ACPI_DEBUG enabled. -- Best regards, Michał Kępień -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
