Hi! > > > When I'm using dock with external input devices (keyboard + mouse) > > > and LID is closed, I'm getting spurious touchpad events and random > > > mouse clicks and movements. > > > > > > It is because top part of LID is above touchpad and probably > > > generates touch pushes. > > > > > > Year (or two?) when I had conversation with ALPS people I was told > > > that Windows driver is automatically turning touchpad off when > > > ACPI LID close event is received (and similarly turn touchpad on). > > > > > > Maybe Linux should do similar thing? Random movement or touchpad > > > clicks is really annoying. But I'm not sure if kernel or userspace > > > should do this job... What do you think? > > > > It is a matter of policy (deciding when device is "usable") and this > > should be controlled from userspace. Kernel should provide necessary > > knobs for it though. For a long time I was saying that it should be > > done at device core level, but I do not think we will ever get > > there. > > > > On ChromeOS input devices export "inhibit" attribute that basically > > overrides open/close count and prevents delivery of events to > > userspace, and power management driver controls this attribute > > together with wake up and others. > > Hm... this sounds like a "disable" property for each event device which > I was talking about months ago (ccing Pavel). Very similar problem is on > Nokia N900, where touchscreen needs to be turned off when screen is > locked and phone in pocket. Yes, disable property would be nice. > > This allows us to implement > > policies like "the touchpad should only be active and a wakeup > > source while the device is in laptop mode, but not in tablet or tent > > mode, or when lid is closed", "disable keyboard in tablet mode or > > when list is closed", etc. While policy normally belongs to userspace, I'd argue this is workaround for a hardware bug, and in-kernel solution would be acceptable. Anyway, disable attribute would be nice first step. Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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