05-27-2009
Solved by restarting HAL
I just had this same issue on Ubuntu 9.04. My USB thumb drive was automounting correctly all day, and I made sure to unmount (eject) before removing it every time, but for whatever reason, it suddenly stopped mounting when I plugged it in.
Thanks to the links provided by techlinux, I learned a bit about HAL, and running "ps aux | grep hal" turned up a line like this:
hald-addon-storage: no polling because /dev/sdc is locked via HAL
With the usb drive unplugged, I restarted HAL, and that fixed the problem, hooray. However, the command is slightly different than specified in the HAL wiki. /etc/rc.d/hal doesn't exist (in fact, /etc/rc.d doesn't exist). This is the command I used:
sudo /etc/init.d/hal restart
Now.. how do we figure out what causes the polling/locked problem in the first place?
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LEARN ABOUT OPENSOLARIS
hal-device
hal-device(1M) System Administration Commands hal-device(1M)
NAME
hal-device - manage HAL devices
SYNOPSIS
hal-device [-h] [--a udi | --r udi]
DESCRIPTION
The Hardware Abstraction Layer (HAL) provides a view of the various hardware attached to a system. The hal-device command enables you to
manage devices that conform to the HAL standard. Specifically, hal-device lets you add or remove a device to or from the HAL global device
list. Device properties are read from stdin in lshal(1M) syntax.
OPTIONS
The following options are supported:
-a, --add udi Add device specified by Universal Device Identifier udi to HAL's global device list.
-h Display usage information.
-r, --remove udi Remove device specified by Universal Device Identifier udi from HAL's global device list.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWhalr |
+-----------------------------+-----------------------------+
|Interface Stability |Volatile |
+-----------------------------+-----------------------------+
SEE ALSO
hald(1M), attributes(5), hal(5)
SunOS 5.11 25 Aug 2006 hal-device(1M)