On Mon, Oct 6, 2008 at 9:50 AM, Ander Conselvan de Oliveira <[EMAIL PROTECTED]> wrote: > Em Monday 06 October 2008 13:23:48 Dan Nicholson escreveu: >> On Mon, Oct 6, 2008 at 7:41 AM, Ander Conselvan de Oliveira >> >> <[EMAIL PROTECTED]> wrote: >> > Hello, >> > >> > I have a user reporting his horizontal wheel is inverted using the evdev >> > input driver. If I understand correctly, evdev handles positive values as >> > "to the right" and negative as "to the left": >> > >> > case REL_HWHEEL: >> > if (value > 0) >> > PostButtonClicks(pInfo, wheel_right_button, value); >> > if (value < 0) >> > PostButtonClicks(pInfo, wheel_left_button, -value); >> > break; >> > >> > But the, somewhat recent, kernel commit >> > 740f370dc61dc478d891d7d47660bb3ae39ddb4f, by Dan Nicholson states: >> > >> > "Some Logitech mice have a tilt wheel which register as HWHEEL buttons. >> > The events are positive for a click to the right and negative for a click >> > to the left. Applications expect the opposite, though." >> > >> > Since I have no mice with horizontal scroll wheels, I have no idea what >> > is the correct way to handle this. >> >> This should definitely be fixed at the kernel level instead of hacking >> around it in userspace. What kind of mouse does he have? > > His mouse is a Logitech V150.
Huh, OK. Let me take another look when I get home and make sure that the behavior is as I described it. >> The above commit message a wrote was simply the behavior I noticed, >> and I don't know authoritatively what value applications expect. I do >> know my mice work correctly with recent kernel (with above commit) and >> recent xf86-input-evdev. A good way to test what the kernel is >> outputting without X getting in the way is evtest, which google will >> point you to, but I used the one from the linux-input CVS: > > The kernel seems to output the correct values (he's using a kernel with the > above commit) [0]. The way I see it, this should not work with the current > evdev driver, since wheel_right_button clicks are posted when the value > reported by the kernel is positive. > > [0] https://qa.mandriva.com/show_bug.cgi?id=44309#c19 I hadn't looked at the code in xf86-input-evdev before, but it does make sense as you've described it. I don't know why the behavior I was seeing was different. AFAIK, there hadn't been any remapping on my system except for the kernel patch I produced. -- Dan _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
