On Mon, Aug 31, 2015 at 11:51:07AM +0200, Michał Kępień wrote: > > > > Now as for actually simulating a keypress, it can be programmed using > > > > the following calling interface (on receiving the e025 WMI notification). > > > > To actually simulate the keypress: > > > > Arg1=0x41 > > > > Arg2 Byte [1:0]: Scan code to simulate > > > > Byte [3:2] > > > > * Bit0 - L Alt > > > > * Bit1 - R Alt > > > > * Bit2 - L Ctrl > > > > * Bit3 - R Ctrl > > > > * Bit4 - L Shift > > > > * Bit5 - R shift > > > > * Bit6 - L Win > > > > * Bit7 - R Win > > > > * Bit8 - Fn key > > > > > > And is it possible to disable keypress simulation on systems that have > > > that capability? > > > > > > My understanding is that all hardware equipped with an Instant Launch > > > button is capable of generating a WMI event upon its press, but not all > > > models can generate a keypress at the same time, correct? If that's the > > > case, then the arguably cleanest solution would be to change the keymap > > > entry for event 0xe025 in dell-wmi.c to KE_KEY and ensure (probably in > > > dell-laptop.c) no i8042 interrupt is raised when the Instant Launch > > > button is pressed. Though that would still leave us with the question of > > > how to determine (ideally without side effects) whether a given model > > > needs disabling keypress simulation. I imagine the pseudocode would be > > > like: > > > > > > if (ec_can_simulate_keypresses) > > > disable_keypress_simulation(); > > > else > > > enable_wmi_event_generation(); > > > > > > If disabling keypress simulation is not possible, dell-wmi.c has to > > > somehow determine whether a 0xe025 WMI event should be ignored or not. > > > > > > Am I making any sense here? > > As the holiday season is coming to an end, I'm taking my last shot at > reviving this thread. Could anyone please tell us: > > * Is there a way to determine whether the EC is capable of simulating > keypresses without the side effects that the SMBIOS call 4, 11 with > argument 64 causes on certain hardware (e.g. disabling keyboard > backlight on an E6440)? Or is there perhaps a well-defined list of > machines that SMBIOS call is (un)safe on? > > * Is it possible to disable keypress simulation on machines on which > the EC supports it? If so, how would one do that? I certainly don't know myself, not what you were hoping to hear back I'm sure. Some of that requires documentation, which I don't know if we have. Does anyone from Dell on Cc have documentation they can share to help answer these questions? -- Darren Hart Intel Open Source Technology Center -- 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
