error getting feature report on linux

[Mte90]

I am trying to use the scythe footswitch without success.
When I execute scythe -r I get that error getting feature report ((null)) [read_pedals(), scythe.c:136] running as root but I restarted udev with:

udevadm control --reload-rules
/etc/init.d/udev restart

ALso I saw that on debian the hid group for udev doesn't exist so I am using for tests plugdev that I used in the past with different udev rules for USB devices.

[Mte90]

I made also a new udev rule only for the scythe executable for testing.

[rgerganov]

When running the program as root udev rules shouldn't matter. Make sure that hidapi library is up to date.

[Mte90]

Yes it is the latest https://packages.debian.org/sid/libhidapi-dev and http://metadata.ftp-master.debian.org/changelogs/main/h/hidapi/hidapi_0.8.0~rc1+git20140818.d17db57+dfsg-2_changelog

[Mte90]

Maybe in the udev rules I have to add the vendorid/productid and see what happen.

[Mte90]

I compiled the testgui and I am getting an error too if I am execute as normal user but as root I don't get any errors and I see also the input.

[Mte90]

I am trying with this udev:

ATTR{product}=="Scythe FootSwitch*"\
MODE:="0666"\
ATTRS{idVendor}=="0426"\
ATTRS{idProduct}=="3011"\
KERNEL=="hidraw*"\
SUBSYSTEMS=="usb"\
RUN+="keymap $name 0x70066 screenlock"\
SYMLINK+="scythe"

[Mte90]

I can see the input of the pedal on the console so I think that they work but there are problems on access from other software.

[Mte90]

I see the output when I plug the pedals but when I execute scythe -r this output is not working anymore.

[Mte90]

I think that keymap is a command that is not available on debian and also on fedora (#18 (comment)).

[Mte90]

Looking on https://packages.ubuntu.com/search?searchon=contents&keywords=keymap&mode=exactfilename&suite=bionic&arch=any is part of a package that on debian exist https://packages.debian.org/sid/utils/fnfxd

It is a daemon but I cannot install because:

mag 11 15:03:43 KITT fnfxd[23279]: fatal error: Could not open /proc/acpi/toshiba/keys.
mag 11 15:03:43 KITT fnfxd[23279]: Please make sure that your kernel has enabled the Toshiba option in the ACPI section.
mag 11 15:03:43 KITT fnfxd[23279]: For more information read the documentation and/or http://fnfx.sf.net/index.php?section=doc#kernel.
mag 11 15:03:43 KITT fnfxd[23279]: FnFX Daemon v0.3 (c) 2003, 2004 Timo Hoenig <thoenig@nouse.net>
mag 11 15:03:43 KITT systemd[1]: fnfxd.service: Control process exited, code=exited status=1
mag 11 15:03:43 KITT systemd[1]: fnfxd.service: Failed with result 'exit-code'.

This package is used on Toshiba laptop to enable the support of multimedia keys, maybe there is another way to do that without looks for a Toshiba specific support.

[Mte90]

after a while I made a python script that do the same of footswitch and support schyte: https://github.com/Mte90/pydal

My plan is to add a configuration for every button etc like footswitch but this solution doesn't have the problem that I have with this and is using evdev that detect every pressure of buttons also as non-root.