On Friday 11 November 2016, Eric Wong wrote: > Sorry for the late response, forwarding to Dmitry and linux-input. > I haven't dealt with input in years... > > Michael Shell <list1@xxxxxxxxxxxxxxxx> wrote: > > Not a big deal, but something nonetheless ... > > > > I recently upgraded my kernel from 4.3 to 4.8.1 (this is a Linux From > > Scratch build). There was only one obvious hiccup - X would not > > start because it no longer saw the mouse. > > > > I have a Logitech RX250 PS2/USB mouse on the PS/2 port (via a USB->PS2 > > adapter): > > > > http://support.logitech.com/en_gb/product/rx250-mouse > > > > The RX250 is a wheel mouse, but with an added left/right scroll wheel > > "tilt" feature to provide for horizontal scrolling. > > > > In my xorg.conf I had: > > > > > > Section "InputDevice" > > Identifier "Mouse0" > > Driver "evdev" > > Option "Name" "ImExPS/2 Logitech Explorer Mouse" > > EndSection > > > > > > However, under the 4.8.1 kernel, cat /proc/bus/input/devices shows: > > > > > > I: Bus=0011 Vendor=0002 Product=0006 Version=0073 > > N: Name="ImExPS/2 BYD TouchPad" > > P: Phys=isa0060/serio1/input0 > > S: Sysfs=/devices/platform/i8042/serio1/input/input3 > > U: Uniq= > > H: Handlers=mouse0 event2 > > B: PROP=1 > > B: EV=7 > > B: KEY=1f0000 0 0 0 0 0 0 0 0 > > B: REL=143 > > > > > > and dmesg shows the lines: > > > > > > psmouse serio1: logips2pp: Detected unknown Logitech mouse model 115 > > input: ImExPS/2 BYD TouchPad as > > /devices/platform/i8042/serio1/input/input3 > > > > > > Changing the mouse name in xorg.conf to "ImExPS/2 BYD TouchPad" did > > allow the mouse to work correctly under X, including the tilt buttons. > > FWIW, in the 4.8.1 kernel config, the byd.c driver does default to > > "Yes", a default which I accepted under make oldconfig. > > > > Apparently, the detection code (byd_detect) in the new byd.c driver, > > which did not even exist in 4.3, (drivers/input/mouse/byd.c) falsely > > sees the Logitech RX250 as being a BYD TouchPad and thus alters the > > vendor and model names. > > > > I do not know if it is also desirable to add an entry for a Logitech > > model 115 in get_model_info in logips2pp.c > > (drivers/input/mouse/logips2pp.c). But if so, I would be willing to > > test any such new code. Even as an unknown Logitech model, it does > > work just fine. I am curious as to how the tilt feature buttons would > > be declared in the model info (would these be PS2PP_EXTRA_BTN, > > or PS2PP_NAV_BTN, etc.?) > > > > > > > > Cheers and thanks in advance, > > > > Mike Shell The BYD detection is broken. I've seen at least 3 different mice detected as BYD touchpad. -- Ondrej Zary -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
