[App_rpt-users] Help with chan_usbradio "HID process has died or something!!"?

[Phil N6TCT]

Situation: A new installation of ACID on your basic 2.4 GHz PC (an IBM
Netvista if it matters) with a DMK USB URI fob connected to an Alinco
DR135 radio.  Everything works great for some number of hours
(anywhere from 6 to 18) ...

Until it stops working and the following errors crop up in
/var/log/asterisk/messages:

[Feb 27 17:17:37] ERROR[3464] chan_usbradio.c: HID process has died or
something!!
[Feb 27 17:46:42] WARNING[3461] app_rpt.c: rpt_thread restarted on node 27680
[Feb 27 17:46:46] ERROR[14747] chan_usbradio.c: HID process has died
or something!!
[Feb 27 17:52:00] WARNING[3461] app_rpt.c: rpt_thread restarted on node 27680
[Feb 27 17:52:00] WARNING[14770] chan_usbradio.c: Possibly stuck USB
read channel. [usb27680]
[Feb 27 17:52:04] ERROR[14770] chan_usbradio.c: HID process has died
or something!!
[Feb 27 17:56:19] WARNING[3461] app_rpt.c: rpt_thread restarted on node 27680
[Feb 27 17:56:23] ERROR[14795] chan_usbradio.c: HID process has died
or something!!

... and the radio/asterisk/app_rpt stops responding to DTMF commands.

When it gets into this state, rebooting fixes it.  I believe most
times in this state asterisk is hung, e.g., won't die from a kill or a
kill -HUP, so something like "service asterisk restart" hangs.

The only other USB device is a keyboard.

chan_usbradio appears to be revision 535
app_rpt appears to be version 0.273

This is from an ACID install image downloaded and installed about 1.5 weeks ago.

Grateful for any advice ... thanks!

Phil, N6TCT