On Friday 03 July 2015 13:26:11 Michał Kępień wrote: > > It looks like above buffer has format of *new* event (0002 - length of > > event, 0000 - type of event, e025 - data). But when using legacy keymap > > then dell-wmi.c parse events with old format (which means type=0000 is > > dropped and data=e025 is translated to some key). > > > > This is even harder as I thought. Looks like big mess and now I would > > say, without documentation for Dell WMI events we are not able to fix > > this correctly without breaking other laptops... > > As far as I understand, the specific case that we're dealing with here > is that on one laptop model a certain WMI event is generated along with > a keycode while another mothel generates the same WMI event without an > accompanying keycode. Currently the Dell WMI driver ignores the WMI > event in question, but it is processed by i8042. > > Could we perhaps do the opposite for this specific event, i.e. filter it > out using the i8042 filter in dell-laptop.c and translate the WMI event > into a keycode in dell-wmi.c? This shouldn't conflict with the dell-rbtn > driver as there are no ACPI devices on an XPS L502X that could be > handled by that driver [1] and thus the i8042 filter should be > installed. However, that i8042 keycode could potentially be generated on > other, WMI-less models and such a change would break them, rendering it > unacceptable. I also assumed pressing the hotkey in question on an XPS > L502X produces the same i8042 keycode as the WMI event code indicates... > > [1] this statement is based on the DSDT dump from a Dell XPS L502X that > I found here: https://launchpadlibrarian.net/68880655/DSDT.dsl > I would like to wait for documentation and not to invent/mess something again and more. Creating big list with DMI names and associate hooks for them based on "our" observation is good way to hell! We even do not know: 1) how to activate code for receiving events 2) what is format of which event 3) which keypress should be reported by i8042 bus and which via ACPI/WMI -- Pali Rohár pali.rohar@xxxxxxxxx -- 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
