I have had this happen around 3-4 times since I installed Lion (when it came out). The system freezes for about 30 seconds, after which the entire screen turns grey, followed by the login screen appearing, just like when you log out or reboot your computer.
These random logouts seem to happen during intensive tasks: last time I was in Photoshop and I clicked the text tool, which of course results in the "Initializing type tool…" dialog. That takes a long time, so I thought I'd switch to another desktop while it's loading, but the desktop-switching animation got stuck between 2 desktops and the entire system froze and then logged out.
What if I have unsaved data? This is a huge problem and it appears to happen quite regularly.
Here's the console log around the time of the crash:
These random logouts seem to happen during intensive tasks: last time I was in Photoshop and I clicked the text tool, which of course results in the "Initializing type tool…" dialog. That takes a long time, so I thought I'd switch to another desktop while it's loading, but the desktop-switching animation got stuck between 2 desktops and the entire system froze and then logged out.
What if I have unsaved data? This is a huge problem and it appears to happen quite regularly.
Here's the console log around the time of the crash:
29 Aug 2011 13:23:42.074 SystemUIServer: kCGErrorFailure: _CGSLockWindow: Cannot synchronize window backing store
29 Aug 2011 13:23:42.104 ConsumerTouchDriver: (ipc/send) invalid destination port: CGSGetWorkspaceWindowCountWithOptionsAndTags
29 Aug 2011 13:23:42.104 ConsumerTouchDriver: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
29 Aug 2011 13:23:42.120 mds: (Error) Server: ==== XPC handleXPCMessage XPC_ERROR_CONNECTION_INVALID
29 Aug 2011 13:23:42.125 UserEventAgent: CaptiveNetworkSupport:UserAgentDied:139 User Agent @port=23847 Died
29 Aug 2011 13:23:42.138 imagent: Quit - notifying about shutdown
29 Aug 2011 13:23:42.138 imagent: Quit - shutting down daemon
29 Aug 2011 13:23:42.181 com.apple.launchd.peruser.501: ([0x0-0x24024].com.wacom.Consumer_TouchDriver[230]) Exited with code: 255
29 Aug 2011 13:23:42.183 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.186 PenTabletDriver: (ipc/send) invalid destination port: CGSGetWorkspaceWindowCountWithOptionsAndTags
29 Aug 2011 13:23:42.186 PenTabletDriver: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
29 Aug 2011 13:23:42.194 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.201 com.apple.launchd.peruser.501: (com.wacom.pentablet[218]) Exited with code: 255
29 Aug 2011 13:23:42.205 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.219 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.230 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.241 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.245 com.apple.launchd: (com.apple.WindowServer[87]) Job appears to have crashed: Illegal instruction: 4
29 Aug 2011 13:23:42.252 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.263 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.274 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.285 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.296 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.307 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.318 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.329 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.339 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.350 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.361 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.371 Dock: (ipc/send) invalid destination port: CGSSetMagicMirror: server didn't like your request
29 Aug 2011 13:23:42.657 com.apple.launchd.peruser.501: (com.apple.Dock.agent[151]) Exited with code: 1
29 Aug 2011 13:23:45.739 loginwindow: Login Window Application Started
29 Aug 2011 13:23:46.834 ReportCrash: Saved crash report for WindowServer[87] version ??? (???) to /Library/Logs/DiagnosticReports/WindowServer_2011-08-29-132346_localhost.crash
29 Aug 2011 13:23:47.970 loginwindow: **DMPROXY** Found `/System/Library/CoreServices/DMProxy'.
29 Aug 2011 13:23:49.055 com.apple.backupd: Stopping backup to allow backup destination disk to be unmounted or ejected.
29 Aug 2011 13:23:49.426 airportd: _doAutoJoin: Already associated to “John”. Bailing on auto-join.
29 Aug 2011 13:23:49.808 com.apple.SecurityServer: Session 100015 created
29 Aug 2011 13:23:49.809 loginwindow: Login Window Started Security Agent
29 Aug 2011 13:23:49.901 WindowServer: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
29 Aug 2011 13:23:49.901 loginwindow: kCGErrorFailure: CGSPackagesGetWorkspaceType: couldn't get workspace type
29 Aug 2011 13:23:49.902 loginwindow: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
29 Aug 2011 13:23:50.459 SecurityAgent: Echo enabled
29 Aug 2011 13:23:50.459 SecurityAgent: Echo enabled
29 Aug 2011 13:23:50.689 com.apple.backupd: Backup canceled.
29 Aug 2011 13:23:50.931 com.apple.backupd: Backup failed because the destination disk was ejected or disconnected unexpectedly!
29 Aug 2011 13:23:51.485 com.apple.launchctl.LoginWindow: com.apple.findmymacmessenger: Already loaded
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