Created attachment 392352 [details] emerge --info xf86-input-mtrack I'm trying xf86-input-mtrack and input-synaptics with my new Logitech T650 touchpad (newly supported with the hid updates in kernel 3.19-rc1). With input-mtrack, I can't get the autohide plasma (kde4) panel at the bottom of my screen to popup, tho I can get the "pre-glow" indicating I'm close to triggering the popup. Testing with xev, the reason would seem to be that with a framebuffer height of 3*1080=3240 (three 1080p full-hd monitors stacked), the bottom row of pixels is 3239 (the top row being 0), while xev says the lowest I can get the pointer is 3238, still one row too high. =:^( Input-synaptics doesn't have this trouble with the same touchpad (restarting X with the other driver configured), and a Logitech M510 mouse (on the same logitech unified wireless receiver), running with the standard evdev driver in the same x-session as the mtrack-driver touchpad, can reach 3239 according to xev, and pops up the panel just fine. Which isolates the issue to the mtrack driver (despite my running xorg-server 1.16.2.901 and an rc1 kernel), and due to the one-pixel difference would seem to hint at an infamous off-by-one. Unfortunately, at least so far finding where that is handled in the mtrack code seems to be beyond my limited non-coder code-reading and patching skills.. =:^( FWIW, the x-axis seems fine, with xev saying it reaches 1919 on the 1920 px framebuffer. =:^) emerge --info xf86-input-mtrack attached.
Please file upstream. We're not capable of solving these issues.
