Trouble with an HP stylus

["Éric Brunet" <Eric.Brunet@lps.ens.fr>]

Hi,

I have a HP EliteBook Revolve 810 (which is a hybrid laptop/tablet) with
the HP active pen that goes with it. I have installed fedora 20 (kernel
3.15.6-200.fc20.x86_64) on this, and the pen does not work out of the box.
Playing with evtest, it appears that the kernel reports the X coordinate in
ABS_X and in ABS_Y, while the Y coordinate goes into ABS_Z and ABS_RX; here
are a few lines of output:

Event: time 1406153996.865044, -------------- SYN_REPORT ------------
Event: time 1406153996.873047, type 3 (EV_ABS), code 0 (ABS_X), value 1087
Event: time 1406153996.873047, type 3 (EV_ABS), code 1 (ABS_Y), value 1087
Event: time 1406153996.873047, type 3 (EV_ABS), code 2 (ABS_Z), value 1599
Event: time 1406153996.873047, type 3 (EV_ABS), code 3 (ABS_RX), value 1599

Of course, XOrg's evdev driver is confused and the pointer is stuck on the
diagonal X=Y.

I guess this hardware needs a new quirk to usbhid, unless there is already
a way to correct it ?

Here is the content of /sys/class/input/event8/device/uevent:

PRODUCT=3/3eb/840b/111
NAME="Atmel Atmel maXTouch Digitizer Pen"
PHYS="usb-0000:00:1a.0-1.1/input0"
UNIQ=""
PROP=0
EV=1b
KEY=c01 1 0 0 0 0
ABS=100000f
MSC=10
MODALIAS=input:b0003v03EBp840Be0111-
e0,1,3,4,k100,140,14A,14B,ra0,1,2,3,18,m4,lsfw

I hope I gave enough information on this. I don't read the mailing list,
please CC any answer.

Thanks,

	Éric Brunet

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