Messages in this thread | | | Date | Fri, 02 May 2003 13:44:03 +0200 | From | Hans-Georg Thien <> | Subject | Re: [RFC][PATCH] "Disable Trackpad while typing" on Notebooks withh a PS/2 Trackpad |
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Andi Kleen wrote: > Hans-Georg Thien <1682-600@onlinehome.de> writes: > > >>The short story >>--------------- >>The trackpad on the MacIntosh iBook Notebooks have a feature that >>prevents unintended trackpad input while typing on the keyboard. There >>are no mouse-moves or mouse-taps for a short period of time after each >>keystroke. > > > Very nice. In fact I wanted something like this for my ibook for a > long time. > > But it won't work on an ibook of course because it doesn't use the > pc_keyb driver. Instead it uses the Input layer for the adb device. > In fact in 2.5 there is only the input layer for everything including > PC keyboards. It should be probably moved there too. > Sounds good! I will look into 2.5 soon. But I fear that a lot of time will pass until 2.6 is available and I think it is a good interim solution for the 2.4 users.
> One suggestion: don't make it a CONFIG_*. Recompiling a kernel > to change things like that is not good. Make it an ioctl that > can be configured at runtime. > that's why I would prefer a LKM instead of a kernel patch. If you know a clean way to save/restore irq-handlers please let me know. That would also allow to make it portable to other platforms like Apple iBook or notebooks with other than PS/2 trackpads.
Implementing an ioctl() is a nice idea too. But why not have it configurable via the /proc interface? If you use ioctl() you still need to write a userspace program. Ok, that's not difficult, but I think it's more comfortable if you can simply use
#/etc/rc.d/trackpad, set trackpad delay time echo "trackpad delay=2000" > /proc/something
#/etc/hotplug??? external mouse is just plugged in, disable trackpad echo "trackpad disable=1" > /proc/something
#/etc/hotplug??? external mouse is just revmoved, re-enable trackpad echo "trackpad disable=0" > /proc/something
> Another one: the disable_trackpad_timer_while_typing variable is not > really needed. You can manage all state by checking the timer with > timer_pending() > yes ok, so I can save one variable. But I would than have to make the enable_trackpad_timer a static global var. That's not really bad, but I feel that "complex datastructures" better hidden in a function, - but it's only a "feeling"
-Hans
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