Hi, I have a mouse here which seems to exist in the HWDB file, except that the Name does not match. The entry in hwdb has mixed case, while mine is all upper-case. As such it is being ignored. FYI, it does not say HP on it, like the entry in hwdb suggests. Instead it has NETGEAR printed on it and was handed out at a tradeshow. I defined the following in /etc/udev/hwdb.d/71-mouse.hwdb mouse:usb:v093ap2510:name:PIXART USB OPTICAL MOUSE: MOUSE_DPI=1000@125 MOUSE_WHEEL_CLICK_ANGLE=15 [robert@t430 hwdb.d]$ sudo udevadm hwdb --update [robert@t430 hwdb.d]$ sudo udevadm trigger /dev/input/event7 [robert@t430 hwdb.d]$ sudo udevadm info /dev/input/event7|grep DPI E: MOUSE_DPI=1000@125 [robert@t430 hwdb.d]$ sudo udevadm info /dev/input/event7 P: /devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/0003:093A:2510.0002/input/input18/event7 N: input/event7 S: input/by-id/usb-PIXART_USB_OPTICAL_MOUSE-event-mouse S: input/by-path/pci-0000:00:1a.0-usb-0:1.2:1.0-event-mouse E: DEVLINKS=/dev/input/by-id/usb-PIXART_USB_OPTICAL_MOUSE-event-mouse /dev/input/by-path/pci-0000:00:1a.0-usb-0:1.2:1.0-event-mouse E: DEVNAME=/dev/input/event7 E: DEVPATH=/devices/pci0000:00/0000:00:1a.0/usb3/3-1/3-1.2/3-1.2:1.0/0003:093A:2510.0002/input/input18/event7 E: ID_BUS=usb E: ID_INPUT=1 E: ID_INPUT_MOUSE=1 E: ID_MODEL=USB_OPTICAL_MOUSE E: ID_MODEL_ENC=USB\x20OPTICAL\x20MOUSE E: ID_MODEL_ID=2510 E: ID_PATH=pci-0000:00:1a.0-usb-0:1.2:1.0 E: ID_PATH_TAG=pci-0000_00_1a_0-usb-0_1_2_1_0 E: ID_REVISION=0100 E: ID_SERIAL=PIXART_USB_OPTICAL_MOUSE E: ID_TYPE=hid E: ID_USB_DRIVER=usbhid E: ID_USB_INTERFACES=:030102: E: ID_USB_INTERFACE_NUM=00 E: ID_VENDOR=PIXART E: ID_VENDOR_ENC=PIXART E: ID_VENDOR_ID=093a E: LIBINPUT_DEVICE_GROUP=3/93a/2510/111:usb-0000:00:1a.0-1 E: MAJOR=13 E: MINOR=71 E: MOUSE_DPI=1000@125 E: MOUSE_WHEEL_CLICK_ANGLE=15 E: SUBSYSTEM=input E: USEC_INITIALIZED=25968850236
https://github.com/systemd/systemd/commit/fb8ab3c895d32d077c554af567ae3927489f8297 you may need a newer systemd to see this update.
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