Logitech-Inc.

Logitech, Inc. Unifying Receiver

Logitech MK540 ADVANCED
Logitech MK850 Performance
Logitech Wireless Keyboard K360
Logitech Wireless Keyboard K400 Plus
Logitech Wireless Mouse M345
Logitech Wireless Trackball M570
Logitech ERGO M575

046d:c52b

2013

USB

trisquel_6_0 , trisquel_7_0

3.14.19-gnu, 3.13.0-39-lowlatency

yes

hid_logitech, hid_logitech_dj, usbhid

[p][b]Issue: The Logitech Unifying Receiver is a USB plug that can listen to several computer peripherals such as mice and keyboards. The Logitech Unifying Receiver is paired with the hardware that it ships with. The Logitech Unifying Receiver can be bought separately if you lose them, but the problem is that you need their proprietary Unifying Software to pair them. The solution is to buy Logitech products that are also designed to pair with Bluetooth adapters.[/b][/p]

[p]For example, Logitech MK850 Performance (released 2017, consisting of 1x Logitech K330 keyboard, 1x Logitech M215 mouse, 1x Logitech Unifying receiver), can connect to the Logitech Unifying Receiver.[/p]

[h2] Pairing [/h2]

[p]Wireless Unifier Receivers and "Nano" Receivers ( A version that only accepts one device per dongle ) can be paired and unpaired with some logitech branded mice and keyboard using the free software (GPLv2) [a]https://pwr.github.io/Solaar/|Solaar[/a] which claims to be a retro-engineered implementation of the logitech's proprietary HID++ protocol.
[/p]

[h3]Experience With Gnewsense-Parkes: [/h3]

[p]If this receiver-wireless keyboard solution is used as primary method of data entry in a setup in which the root mount point is inside an encrypted partition, the receiver doesn't work between its use in the Grub Menu and the loading of the modules by the Operating System, preventing the decryption password from being entered, stopping loading of the Operating System. In order to fix that, append these lines to [b]/etc/initramfs-tools/modules[/b] :
[code]hid_logitech
hid_logitech_dj
#One of the above may not be alway be required and my produce a warning
[/code]

And per instructions on the file itself, one must run [b]update-initramfs [/b] for the change to take effect.
If the changes didn't seemed to take effect, verify that the kernel configuration file in /boot/ have the following values equal to "m" as in "module".
CONFIG_HID_LOGITECH=m
CONFIG_HID_LOGITECH_DJ=m



[/p]


[p]lsusb[/p]
[code]Bus 003 Device 078: ID 046d:c52b Logitech, Inc. Unifying Receiver[/code]

[p]lsusb -v[/p]

[code]Bus 003 Device 078: ID 046d:c52b Logitech, Inc. Unifying Receiver
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 32
idVendor 0x046d Logitech, Inc.
idProduct 0xc52b Unifying Receiver
bcdDevice 24.00
iManufacturer 1 Logitech
iProduct 2 USB Receiver
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 84
bNumInterfaces 3
bConfigurationValue 1
iConfiguration 4 RQR24.00_B0018
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 98mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 1 Keyboard
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 59
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 8
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 1 Boot Interface Subclass
bInterfaceProtocol 2 Mouse
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 148
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 2
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 98
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 2
Device Status: 0x0000
(Bus Powered)
[/code]

[p]dmesg[/p]
[code][144778.649419] usb 3-2: new full-speed USB device number 78 using xhci_hcd
[144778.816720] usb 3-2: New USB device found, idVendor=046d, idProduct=c52b
[144778.816725] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[144778.816727] usb 3-2: Product: USB Receiver
[144778.816729] usb 3-2: Manufacturer: Logitech
[144778.826690] logitech-djreceiver 0003:046D:C52B.000A: hiddev0,hidraw0: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:14.0-2/input2
[144778.878759] input: Logitech Unifying Device. Wireless PID:4017 as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.2/0003:046D:C52B.000A/0003:046D:C52B.000B/input/input43
[144778.879129] logitech-djdevice 0003:046D:C52B.000B: input,hidraw1: USB HID v1.11 Mouse [Logitech Unifying Device. Wireless PID:4017] on usb-0000:00:14.0-2:1
[/code]

[h1]Logitech Wireless Keyboard K400 Plus[/h1]
[b]Works perfectly out of the box[/b] on Trisquel 7.0 (Linux 3.13.0-39-lowlatency):
[list]
Mute and volume buttons work perfectly.
[/list]

[list]Yellow mouse button (located above ESC) works perfectly (i.e., as an additional left mouse button).
[/list]

[h1]Logitech Wireless Trackball M570[/h1]
[enum]
[list]Year of commercialization: 2010[/list]
[list]Still produced: No[/list]
[list]Tested on: Trisquel 11: Unifying USB Receiver: Yes[/list]
[list]Note: Freedom issue: New Unifying USB Receivers requires proprietary software to be paired. M570 Does not support Bluetooth, so a Bluetooth USB dongle cannot be connected instead. The successor of M570, Logitech ERGO M575 support Bluetooth.[/list]
[/enum]

[h1]Logitech ERGO M575[/h1]
Logitech ERGO M575 is the successor wireless trackball to Logitech M570 that is not produced anymore.

[enum]
[list]Year of commercialization: 2020[/list]
[list]Still produced: Yes[/list]
[list]Tested on: Trisquel 11[/list]
[list]Does it work with free software?: Yes[/list]
[list]Note: Freedom issue: New Unifying USB Receivers requires proprietary software to be paired. However, M575 supports Bluetooth, so a Bluetooth USB dongle can be connected instead.[/list]
[/enum]