This question arose in an earlier thread with other issues. I'm starting a new thread to separate it from the other issues, and with some additional information.

I'm running SLES 12, aarch64, on a Raspberry Pi 3. On both Raspbian and Fedora running on the Pi, the OS saw the K400 Plus keyboard on first boot, and that keyboard/trackpad worked just fine. On SLES 12, it didn't see the K400+ (apparently), and I've had to plug in a USB kbd & mouse to do any work. I'd like to try (again) to get the K400+ working on SLES -- I'm liking SLES, but I really need to get rid of the USB devices on my Pi.

I did find and install the Solaar package. WARNING: the version from the SUSE repository is outdated, even though the version numbers are the same! Go to the Github repository ( https://github.com/pwr/Solaar ) and download the zip from there; unzip it; connect to the Solaar master directory; and run the setup.py program there ("build" and then "install"). The updated version on Github includes support for the K400+.

The problem is that Solaar is used to pair and configure Logitech devices. It isn't the driver for kbd/mouse that the kernel needs. That driver appears to be loaded as a module, but the keyboard still doesn't work. The kbd/trackpad are paired to the USB wireless dongle, and Solaar sees and can configure it just fine, but the kbd doesn't interact with the OS.

Solaar reports:
Index : 1
Wireless PID : 404D
Protocol : HID++ 2.0
Polling rate : 8 ms (125Hz)
Serial : ABAF0629
Bootloader : BOT 22.01.B0001
Firmware : RQK 63.01.B0014
Other :

modinfo reports:
pi-6:~ # modinfo hid_logitech_dj
filename: /lib/modules/4.4.21-90-default/kernel/drivers/hid/hid-logitech-dj.ko
author: nlopezcasad@logitech.com
author: Nestor Lopez Casado
author: Logitech
license: GPL
srcversion: F3A9F93C83C7C05995A1FE7
alias: hid:b0003g*v0000046Dp0000C532
alias: hid:b0003g*v0000046Dp0000C52B
depends:
supported: yes
intree: Y
vermagic: 4.4.21-90-default SMP mod_unload modversions aarch64
signer: SUSE Linux Enterprise Secure Boot Signkey
sig_key: 3F:B0:77:B6:CE:BC:6F:F2:52:2E:1C:14:8C:57:C7:77:C7 :88:E3:E7
sig_hashalgo: sha256

So it appears that the driver has loaded, and the USB dongle is paired, but the kernel isn't seeing the characters come from the kbd/trackpad.

Has anyone gotten this combination to work? I'm pretty sure this is a simple configuration error on my part, but after much trying, I still haven't gotten it to work.

Thanks for any suggestions you can offer.