:: Re: [DNG] loss of keyboard input
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Autor: Haines Brown
Data:  
Para: dng
Assunto: Re: [DNG] loss of keyboard input
Tito, thanks, but I'm still at a loss

One of mu HD partitions needs fsck, and so can't even boot to the log in
prompt (can't type Ctkl-D to enter maintenance). Can't get into BIOS either.

Substituted keyboard and cable; pulled all other USB devices.

Don't see how I can run a C program with no keyboard.

Hardware is quite new.

Can you recommend an internet discussion list for hardware troubleshooting?
Hate to think I may have to replace the motherboard.

Haines



On Wed, Dec 14, 2022 at 02:27:53PM +0100, tito via Dng wrote:
> On Wed, 14 Dec 2022 06:22:30 -0500
> Haines Brown <haines@???> wrote:
>
> > In the course of the night I lost keyboard input. Numlock and Caps
> > Lockkey LEDs do not turn on. Mouse is OK. I went to replug my PS2
> > keyboard and the PS2-USB adpater separated.
> >
> > A replacement keyboard and adapter in different USB port do not work.
> >
> > A dirty reboot may result in my not being able to log in, but is it
> > worth a try?
> >
> Hi,
> you can try this C program to reset the usb device.
> Hope this helps.
>
> Ciao,
> Tito
> ___________________________________________________________________________-
> #include <stdio.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;
> }
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--
Haines Brown