Merci,
Je m'auto répond pour donner des pistes à ceux qui serait dans mon cas :
for device in $(ls /sys/bus/usb/devices/*/product); do echo $device;cat $device;done
/sys/bus/usb/devices/3-2/product
photosmart 7700 series
/sys/bus/usb/devices/4-1/product
Logitech Z-5 Speakers
/sys/bus/usb/devices/usb1/product
EHCI Host Controller
/sys/bus/usb/devices/usb2/product
EHCI Host Controller
/sys/bus/usb/devices/usb3/product
OHCI Host Controller
/sys/bus/usb/devices/usb4/product
OHCI Host Controller
In the case of my speakers I'd do the following:
echo suspend | sudo tee /sys/bus/usb/devices/4-1/power/level
TO turn back on:
echo on | sudo tee /sys/bus/usb/devices/4-1/power/level
ou
/* usbreset -- send a USB port reset to a USB device */
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <linux/usbdevice_fs.h>
int main(int argc, char **argv)
{
const char *filename;
int fd;
int rc;
if (argc != 2) {
fprintf(stderr, "Usage: usbreset device-filename\n");
return 1;
}
filename = argv[1];
fd = open(filename, O_WRONLY);
if (fd < 0) {
perror("Error opening output file");
return 1;
}
printf("Resetting USB device %s\n", filename);
rc = ioctl(fd, USBDEVFS_RESET, 0);
if (rc < 0) {
perror("Error in ioctl");
return 1;
}
printf("Reset successful\n");
close(fd);
return 0;
}
Je vais tenter de voir quelle méthode utiliser, je vous tiendrai au courant.