罗技 Unifying 接收器是无线设备的接收器,可同时连接最多六个兼容鼠标及键盘。 和该接收器一组的输入设备已预先配对,并能即插即用。而针对额外的输入设备,罗技仅提供 Windows 软件以供配对。 不过 Benjamin Tissoires 在 kernel mailing list 发表了一支程序,令 Linux 下也有其功能。
编译 unifying_pair
此程序亦可于 AUR 找到。
首先确定系统已安装了 C 编译器。
# pacman -S gcc
将下列代码复制到文件并命名,假设名为 unifying_pair.c。
/*
* Copyright 2011 Benjamin Tissoires
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#include <linux/input.h>
#include <linux/hidraw.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#define USB_VENDOR_ID_LOGITECH (__u32)0x046d
#define USB_DEVICE_ID_UNIFYING_RECEIVER (__s16)0xc52b
#define USB_DEVICE_ID_UNIFYING_RECEIVER_2 (__s16)0xc532
int main(int argc, char **argv)
{
int fd;
int res;
struct hidraw_devinfo info;
char magic_sequence[] = {0x10, 0xFF, 0x80, 0xB2, 0x01, 0x00, 0x00};
if (argc == 1) {
errno = EINVAL;
perror("No hidraw device given");
return 1;
}
/* Open the Device with non-blocking reads. */
fd = open(argv[1], O_RDWR|O_NONBLOCK);
if (fd < 0) {
perror("Unable to open device");
return 1;
}
/* Get Raw Info */
res = ioctl(fd, HIDIOCGRAWINFO, &info);
if (res < 0) {
perror("error while getting info from device");
} else {
if (info.bustype != BUS_USB ||
info.vendor != USB_VENDOR_ID_LOGITECH ||
(info.product != USB_DEVICE_ID_UNIFYING_RECEIVER &&
info.product != USB_DEVICE_ID_UNIFYING_RECEIVER_2)) {
errno = EPERM;
perror("The given device is not a Logitech "
"Unifying Receiver");
return 1;
}
}
/* Send the magic sequence to the Device */
res = write(fd, magic_sequence, sizeof(magic_sequence));
if (res < 0) {
printf("Error: %d\n", errno);
perror("write");
} else if (res == sizeof(magic_sequence)) {
printf("The receiver is ready to pair a new device.\n"
"Switch your device on to pair it.\n");
} else {
errno = ENOMEM;
printf("write: %d were written instead of %ld.\n", res,
sizeof(magic_sequence));
perror("write");
}
close(fd);
return 0;
}
将源代码编译成可执行档 unifying_pair:
$ gcc -o unifying_pair unifying_pair.c
兼容设备配对
下一步需要查找接收器设备的位置,因此观察下列命令的输出
$ cat /sys/class/hidraw/hidrawX/device/uevent |grep NAME
(你必须把 X 替换成系统上存在的整数) 直到找到 Logitech USB Receiver 为止(在此假设 X 恰为 0)
$ cat /sys/class/hidraw/hidraw0/device/uevent |grep NAME HID_NAME=Logitech USB Receiver
如果想要配对的设备现在是开着时,关掉并执行适才编译过的程序,以合适的设备做为其参数:
# ./unifying_pair /dev/hidraw0
若顺利该程序会告知你打开欲配对的设备,且该设备应该也会正常运作。
Known Problems
Keyboard Layout via xorg.conf
With kernel 3.2 the Unifying Receiver got its own kernel module hid_logitech_dj which does not work flawlessly together with keyboard layout setting set via xorg.conf. A temporary workaround is to use xorg-setxkbmap包 and set the layout manually. For example for a German layout with no deadkeys one has to execute:
$ setxkbmap -layout de -variant nodeadkeys
To automate this process one could add this line to xinitrc.