My T440s thinkpad randomly freezes when running both the LTS and current Ubuntu release. I haven't be able to identify a pattern to the freezes.
This happened on Mint 17.1, so I tried fresh installs of Ubuntu 15.04 and Ubuntu 14.04 and it happens on both.
I have Intel Graphics.
No escape shortcuts seem to work, I've tried all of them including ctrl-alt-backspace and alt-printscrn-R/E/I/S/U/B
Here are my last 10 minutes of syslog entries before it freezes up, if anyone can offer suggestions I'd be very happy!
Jun 18 13:55:01 rathboma-thinkpad signond[19525]: QObject::disconnect: Unexpected null parameter
Jun 18 13:55:06 rathboma-thinkpad ntpdate[19768]: adjust time server 91.189.89.199 offset -0.007403 sec
Jun 18 13:55:19 rathboma-thinkpad AptDaemon: INFO: Quitting due to inactivity
Jun 18 13:55:19 rathboma-thinkpad AptDaemon: INFO: Quitting was requested
Jun 18 13:55:19 rathboma-thinkpad org.debian.apt[750]: 13:55:19 AptDaemon [INFO]: Quitting due to inactivity
Jun 18 13:55:19 rathboma-thinkpad org.debian.apt[750]: 13:55:19 AptDaemon [INFO]: Quitting was requested
Jun 18 13:55:27 rathboma-thinkpad ntpdate[19818]: adjust time server 91.189.89.199 offset 0.002787 sec
Jun 18 13:55:43 rathboma-thinkpad gnome-session[1788]: [7316:7316:0618/185543:ERROR:gles2_cmd_decoder.cc(11539)] [GroupMarkerNotSet(crbug.com/242999)!:D07020FCAA180000]GL ERROR :GL_INVALID_OPERATION : glTexStorage2DEXT: <- error from previous GL command
Jun 18 13:55:49 rathboma-thinkpad gnome-session[1788]: [WARNING:flash/platform/pepper/pep_module.cpp(63)] SANDBOXED
Jun 18 13:55:54 rathboma-thinkpad gnome-session[1788]: Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
Jun 18 13:55:54 rathboma-thinkpad com.ubuntu.OneConf[1683]: WARNING:oneconf.hosts:Error in loading other_hosts file: [Errno 2] No such file or directory: '/home/rathboma/.cache/oneconf/9e2f458505b84348ac5265c279472395/other_hosts'
Jun 18 13:56:45 rathboma-thinkpad gnome-session[1788]: [7316:7316:0618/185645:ERROR:gles2_cmd_decoder.cc(11539)] [GroupMarkerNotSet(crbug.com/242999)!:D0F0B618AB180000]GL ERROR :GL_INVALID_OPERATION : glTexStorage2DEXT: <- error from previous GL command
Jun 18 13:56:47 rathboma-thinkpad gnome-session[1788]: [7275:7312:0618/135647:ERROR:channel.cc(300)] RawChannel read error (connection broken)
Jun 18 13:56:49 rathboma-thinkpad gnome-session[1788]: [7316:7316:0618/185649:ERROR:gles2_cmd_decoder.cc(11539)] [GroupMarkerNotSet(crbug.com/242999)!:D0709D0DAB180000]GL ERROR :GL_INVALID_OPERATION : glTexStorage2DEXT: <- error from previous GL command
Jun 18 14:00:41 rathboma-thinkpad gnome-session[1788]: [7316:7316:0618/190041:ERROR:gles2_cmd_decoder.cc(11539)] [GroupMarkerNotSet(crbug.com/242999)!:D0F0B618AB180000]GL ERROR :GL_INVALID_OPERATION : glTexStorage2DEXT: <- error from previous GL command
Jun 18 14:01:03 rathboma-thinkpad gnome-session[1788]: [7275:7312:0618/140103:ERROR:channel.cc(300)] RawChannel read error (connection broken)
Jun 18 14:03:42 rathboma-thinkpad gnome-session[1788]: [7275:7312:0618/140342:ERROR:channel.cc(300)] RawChannel read error (connection broken)
Jun 18 14:03:48 rathboma-thinkpad gnome-session[1788]: [7275:7275:0618/140348:ERROR:extension_host.cc(367)] Killing renderer for extension eifdbcbnlahelniokpkpdlhaocgjdcje for sending an EventAck message with a bad event id.
Jun 18 14:03:48 rathboma-thinkpad gnome-session[1788]: [7275:7275:0618/140348:ERROR:bad_message.cc(16)] Terminating extension renderer for bad IPC message, reason 3
Jun 18 14:05:50 rathboma-thinkpad gnome-session[1788]: ERROR 2015-06-18 14:05:50 unityfree <unknown>:0 g_sequence_get: assertion '!is_end (iter)' failed
Jun 18 14:05:50 rathboma-thinkpad gnome-session[1788]: ERROR 2015-06-18 14:05:50 unity null <unknown>:0 Unable to get value. NULL row data in DeeSequenceModel@0x2d300b0 at position 1. The row has probably been removed
Jun 18 14:05:50 rathboma-thinkpad gnome-session[1788]: ERROR 2015-06-18 14:05:50 unity null <unknown>:0 Unable to get string. Column 5 in DeeSequenceModel@0x2d300b0 holds a NULL value in row 1
