[Nut-upsuser] usbhid-ups driver can't be killed...

[Frédéric Marchal]

Hello

I'm encountering a big problem with usbhid-ups driver : the driver hangs 
after loading some other modules (stale data message) !
And we can't restart it.

We load :
i2c-piix4
adm1021
adm9240
lm75

The unloading of the modules doesn't solve the problem.

# ps -eaf | grep usb
/root       188     2  0 07:29 ?        00:00:00 [ksuspend_usbd]
root       996     2  0 07:29 ?        00:00:00 [usbhid_resumer]
nut       5644     1  0 07:33 ?        00:01:02 /lib/nut/usbhid-ups -a 
ellipse
nut      17544     1  0 11:09 pts/0    00:00:00 /lib/nut/usbhid-ups -a 
ellipse
nut      17725     1  0 11:11 pts/0    00:00:00 /lib/nut/usbhid-ups -a 
ellipse
nut      18072     1  0 11:15 pts/0    00:00:00 /lib/nut/usbhid-ups -a 
ellipse
root     19518 14357  0 11:41 pts/0    00:00:00 lsusb
nut      20215     1  0 11:52 pts/2    00:00:00 /lib/nut/usbhid-ups -a 
ellipse -k
nut      20278     1  0 11:53 pts/2    00:00:00 /lib/nut/usbhid-ups -a 
ellipse -k
root     20290     1  0 11:53 ?        00:00:00 lsusb
nut      20497     1  0 11:58 pts/2    00:00:00 /lib/nut/usbhid-ups -a 
ellipse -k/

# upsdrvctl -DDD shutdown ellipse
/Network UPS Tools - UPS driver controller 2.4.1
Shutdown UPS: ellipse
exec: /lib/nut/usbhid-ups -a ellipse -k
Network UPS Tools - Generic HID driver 0.34 (2.4.1)
USB communication driver 0.31
Startup timer elapsed, continuing.../

After I've unplugged the ups from the usb port, lsusb has hanged too !

And the load average increases :
/load average: 10.24, 8.64, 6.58/

Is there a solution to kill these processes ?
kill -TERM, -QUIT or -9 don't work !

We are using nut 2.4.1-r1.

Any suggestions ? Is this a known bug ?
Thanks for your help.

Regards, Frederic

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