title: Eclipse freezes UI on Ubuntu
body: <p>I have recently installed ubuntu 16.04 (updated automatically to this version) and I usually develop in Java, and I know eclipse, so I installed it, all fine.</p>
  
  <p>I configured everything needed (Java path, JDK...nothing special), works fine, except for the Eclipse UI.</p>
  
  <p>The UI freezes every time I create a project (Although the project is created correctly), every time I run any program (Although the program runs as it should (not always correctly xD, but thats my fault)), and with many other tasks.</p>
  
  <p>Any idea why this can happen? And even better, how to solve it?</p>
  
  <p>I also double checked what JRE I´m using (As I found people having problems with open source software), I use oracle´s version (Not sure about the name right now, sorry, version 8).
  Everything on it´s 64 bit version.</p>
  
  <p>Edit: I forgot to mention I use Mars version. Also, I just installed NetBeans (8.1), exact same problem, then I thought it was graphics drivers problems, installed that again, still have the same problem. No idea what to try now.</p>
  
  <p><strong>UPDATE:</strong> Checked log file. I see nothing strange, but might be missing something:</p>
  
  <pre><code>!SESSION 2015-12-04 13:24:38.930     -----------------------------------------------
   eclipse.buildId=4.5.1.M20150904-0015
   java.version=1.8.0_66
   java.vendor=Oracle Corporation
   BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=es_ES
   Command-line arguments:  -os linux -ws gtk -arch x86_64
  
   !ENTRY org.eclipse.core.resources 2 10035 2015-12-04 13:24:40.542
   !MESSAGE The workspace exited with unsaved changes in the previous session; refreshing workspace to recover changes.
  </code></pre>
  
  <p><strong>UPDATE 2:</strong> I just run the commands @dan suggested. Here is the result</p>
  
  <pre><code> "main" #1 prio=6 os_prio=0 tid=0x00007f0ec000a000 nid=0x26e0 runnable [0x00007f0ec9a18000]
     java.lang.Thread.State: RUNNABLE
      at org.eclipse.swt.internal.gtk.OS._gtk_widget_get_allocation(Native Method)
      at org.eclipse.swt.internal.gtk.OS.gtk_widget_get_allocation(OS.java:14234)
      at org.eclipse.swt.widgets.Control.getBounds(Control.java:832)
      at org.eclipse.jface.fieldassist.ControlDecoration.getDecorationRectangle(ControlDecoration.java:1185)
      at org.eclipse.jface.fieldassist.ControlDecoration$3.paintControl(ControlDecoration.java:635)
      at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:230)
      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4481)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1329)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1353)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1338)
      at org.eclipse.swt.widgets.Control.gtk_draw(Control.java:3219)
      at org.eclipse.swt.widgets.Canvas.gtk_draw(Canvas.java:171)
      at org.eclipse.swt.widgets.Shell.gtk_draw(Shell.java:1306)
      at org.eclipse.swt.widgets.Widget.windowProc(Widget.java:1942)
      at org.eclipse.swt.widgets.Control.windowProc(Control.java:5590)
      at org.eclipse.swt.widgets.Display.windowProc(Display.java:4717)
      at org.eclipse.swt.internal.gtk.OS._gtk_main_do_event(Native Method)
      at org.eclipse.swt.internal.gtk.OS.gtk_main_do_event(OS.java:9279)
      at org.eclipse.swt.widgets.Display.eventProc(Display.java:1225)
      at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration(Native Method)
      at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration(OS.java:2425)
      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3428)
      at org.eclipse.jface.operation.ModalContext$ModalContextThread.block(ModalContext.java:172)
      at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:387)
      at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:1002)
      at org.eclipse.jdt.internal.ui.wizards.NewElementWizard.performFinish(NewElementWizard.java:134)
      at org.eclipse.jdt.internal.ui.wizards.NewClassCreationWizard.performFinish(NewClassCreationWizard.java:80)
      at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:799)
      at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:429)
      at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:619)
      at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4481)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1329)
      at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3819)
      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3430)
      at org.eclipse.jface.window.Window.runEventLoop(Window.java:827)
      at org.eclipse.jface.window.Window.open(Window.java:803)
      at org.eclipse.ui.internal.navigator.wizards.WizardShortcutAction.run(WizardShortcutAction.java:99)
      at org.eclipse.jface.action.Action.runWithEvent(Action.java:473)
      at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:595)
      at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:511)
      at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:420)
      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4481)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1329)
      at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3819)
      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3430)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
      at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
      at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:654)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
      at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598)
      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)
      at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:497)
      at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
      at org.eclipse.equinox.launcher.Main.main(Main.java:1488)
  
     Locked ownable synchronizers:
      - None
  </code></pre>