Some /dev/input missing after soft reboot
 

Hi all,

I'm currently developping an embedded system running Linux 2.6.24 on a SBC9261 board.

Special files /dev/input/event0 and /dev/input/event1 allow me to get infos from some GPIOs and a touchscreen.

Everything is working fine but when I "soft-reboot" the board (with the reboot shell command), those two files are then missing.

Just after the reboot command, umount returns two errors :

• umount: /tmpfs busy - remounted read-only
• umount: /etc/mtab: No such file or directory

In /etc/inittab :

::shutdown:/bin/umount -a -r
::shutdown:/sbin/swapoff -a

I assume umount cannot unmount /dev, but could it be related to my issue ?
After a hardware-reset, everything is working fine again.

Let me know if you need additional info !

Thank you for answering !

Probably it is related. Look into the boot log and search for messages with /dev-related errors. Or just save a boot log after hard and soft reset and compare them. I guess some driver doesn't initialize correctly, what may be caused by the device not being shutdown correctly before the soft reset. But you need to look for the exact cause.