Logitech unifying receiver monitoring

While going through Fedora’s Tagger, I came across a package called Solaar, a Linux device manager for Logitech’s Unifying Receiver.

I thought “Well, this could be pretty useful” because until the little lights on my MX Master mouse start flashing red, I never know the charge status of the mouse.

Installing the package with dnf install solaar gave me a taskbar icon, but for some reason it didn’t find any devices to manage. After poking around in the Solaar installation documentation, it looked like my problem was that the Fedora package didn’t install the udev rules that allow non-root access to the Logitech Unifying Receiver.

Once I added the rules file and a new user group, Solaar was able to find the MX Master and show me its status.

Working pretty well so far, and it’s nice being able to see the charge status of my mouse. Doesn’t let me configure buttons or change DPI settings, but maybe that’s something I can convince solaar to do.

~/workspace> solaar show
Unifying Receiver
  Device path  : /dev/hidraw4
  USB id       : 046d:c52b
  Serial       : 89629F0B
    Firmware   : 12.03.B0025
    Bootloader : 02.15
    Other      : AA.AA
  Has 1 paired device(s) out of a maximum of 6.
  Notifications: wireless, software present (0x000900)
  Device activity counters: 1=130

  1: Wireless Mouse MX Master
     Codename     : MX Master
     Kind         : mouse
     Wireless PID : 4041
     Protocol     : HID++ 4.5
     Polling rate : 8 ms (125Hz)
     Serial number: 756A9A32
        Bootloader: BOT 18.01.B0014
          Firmware: MPM 11.02.B0014
          Firmware: MPM 11.02.B0014
             Other:
     The power switch is located on the base.
     Supports 29 HID++ 2.0 features:
         0: ROOT                   {0000}
         1: FEATURE SET            {0001}
         2: DEVICE FW VERSION      {0003}
         3: DEVICE NAME            {0005}
         4: WIRELESS DEVICE STATUS {1D4B}
         5: RESET                  {0020}
         6: BATTERY STATUS         {1000}
         7: CHANGE HOST            {1814}
         8: REPROG CONTROLS V4     {1B04}
         9: ADJUSTABLE DPI         {2201}
        10: VERTICAL SCROLLING     {2100}
        11: SMART SHIFT            {2110}
        12: HIRES WHEEL            {2121}
        13: GESTURE 2              {6501}
        14: DFUCONTROL 2           {00C1}
        15: unknown:1813           {1813}   internal, hidden
        16: unknown:1830           {1830}   internal, hidden
        17: unknown:1890           {1890}   internal, hidden
        18: unknown:18A1           {18A1}   internal, hidden
        19: unknown:18C0           {18C0}   internal, hidden
        20: unknown:1DF3           {1DF3}   internal, hidden
        21: unknown:1E00           {1E00}   hidden
        22: unknown:1EB0           {1EB0}   internal, hidden
        23: unknown:1803           {1803}   internal, hidden
        24: unknown:1861           {1861}   internal, hidden
        25: unknown:9000           {9000}   internal, hidden
        26: unknown:9200           {9200}   internal, hidden
        27: unknown:9240           {9240}   internal, hidden
        28: unknown:1805           {1805}   internal, hidden
     Battery: 50%, discharging.

Update: Ended up running into some issues with the taskbar icon reverting back to not detecting any devices. This is apparently a known issue, so I cloned the Solaar repo and pulled in some of the PRs that are supposed to address the issue. Copied the files to where they were installed on the system (/usr/lib/python2.7/site-packages/) and restarted the app. Solaar picked up the mouse, and even some options for configuring the mouse, including DPI control. Woot! So far, no more problems with Solaar suddenly forgetting the mouse.