LiveGPS is unreliable on my laptop

[anonymous]

What steps will reproduce the problem?

1. Select LiveGPS in prefs, select OK, continue through 'restart JOSM dialog, quit JOSM
2. Restart JOSM with a data file; or, open a datafile from JOSM
3. That's it, crashes almost every time.

What is the expected result? Live GPS working

What happens instead? Error dialog, LiveGPS disabled.

Please provide any additional information below. Attach a screenshot if
possible.

It's been like this for a long time. It still doesn't work. It's fine on my Desktop machine, same OS, same versions - Oh how useful!

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2013-03-23 02:34:01
Last Changed Author: Don-vip
Revision: 5798
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2013-03-23 00:51:05 +0100 (Sat, 23 Mar 2013)
Last Changed Rev: 5798

Identification: JOSM/1.5 (5798 en_GB)
Memory Usage: 93 MB / 853 MB (33 MB allocated, but free)
Java version: 1.6.0_27, Sun Microsystems Inc., OpenJDK 64-Bit Server VM
Operating system: Linux
Dataset consistency test: No problems found

Plugin: ElevationProfile (28150)
Plugin: FixAddresses (29210)
Plugin: download_along (29210)
Plugin: gpxfilter (29222)
Plugin: livegps (27679)
Plugin: openstreetbugs (29373)

org.openstreetmap.josm.plugins.PluginException: An error occurred in plug-in livegps
	at org.openstreetmap.josm.plugins.PluginProxy.mapFrameInitialized(PluginProxy.java:32)
	at org.openstreetmap.josm.plugins.PluginHandler.notifyMapFrameChanged(PluginHandler.java:928)
	at org.openstreetmap.josm.Main.setMapFrame(Main.java:258)
	at org.openstreetmap.josm.Main.createMapFrame(Main.java:423)
	at org.openstreetmap.josm.Main.addLayer(Main.java:412)
	at org.openstreetmap.josm.io.OsmImporter$1.run(OsmImporter.java:78)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:673)
	at java.awt.EventQueue.access$300(EventQueue.java:96)
	at java.awt.EventQueue$2.run(EventQueue.java:634)
	at java.awt.EventQueue$2.run(EventQueue.java:632)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:643)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:194)
	at java.awt.Dialog$1.run(Dialog.java:1079)
	at java.awt.Dialog$3.run(Dialog.java:1133)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.Dialog.show(Dialog.java:1131)
	at java.awt.Component.show(Component.java:1571)
	at java.awt.Component.setVisible(Component.java:1523)
	at java.awt.Window.setVisible(Window.java:951)
	at java.awt.Dialog.setVisible(Dialog.java:1013)
	at org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor$4.run(PleaseWaitProgressMonitor.java:170)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:673)
	at java.awt.EventQueue.access$300(EventQueue.java:96)
	at java.awt.EventQueue$2.run(EventQueue.java:634)
	at java.awt.EventQueue$2.run(EventQueue.java:632)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:643)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:616)
	at org.openstreetmap.josm.plugins.PluginProxy.mapFrameInitialized(PluginProxy.java:29)
	... 39 more
Caused by: java.lang.NoSuchMethodError: org.openstreetmap.josm.tools.Shortcut.registerShortcut(Ljava/lang/String;Ljava/lang/String;III)Lorg/openstreetmap/josm/tools/Shortcut;
	at livegps.LiveGpsDialog.<init>(LiveGpsDialog.java:45)
	at livegps.LiveGpsPlugin.mapFrameInitialized(LiveGpsPlugin.java:225)
	... 44 more

[stoecker]

For livegps version 29222 is current. Simply update the plugin and the error will be gone. I suggest to enable automatic updates.

[Don-vip]

Ticket #7839 has been marked as a duplicate of this ticket.