[   11.866872] init: plymouth-upstart-bridge main process ended, respawning
[   11.870447] init: plymouth-upstart-bridge main process (1593) terminated with status 1
[   11.907177] systemd-logind[1040]: Failed to start unit user@104.service: Unknown unit: user@104.service
[   11.907183] systemd-logind[1040]: Failed to start user service: Unknown unit: user@104.service
[   11.911416] systemd-logind[1040]: New session c1 of user lightdm.
[   11.911436] systemd-logind[1040]: Linked /tmp/.X11-unix/X0 to /run/user/104/X11-display.
[   12.027698] init: gdm main process (1643) killed by TERM signal
[   12.629246] usb 2-1.7: current rate 0 is different from the runtime rate 48000
[   12.632371] usb 2-1.7: current rate 0 is different from the runtime rate 48000
[   12.644137] usb 2-1.7: current rate 0 is different from the runtime rate 48000
[   12.647292] usb 2-1.7: current rate 0 is different from the runtime rate 48000
[   12.957679] vboxdrv: module verification failed: signature and/or  required key missing - tainting kernel
[   12.960966] vboxdrv: Found 4 processor cores.
[   12.962005] vboxdrv: fAsync=0 offMin=0x16d offMax=0x104b
[   12.962103] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'.
[   12.962105] vboxdrv: Successfully loaded version 4.3.18_Ubuntu (interface 0x001a0008).
[   12.981411] vboxpci: IOMMU not found (not registered)
[   13.462363] init: plymouth-stop pre-start process (2466) terminated with status 1
[   13.625765] r8169 0000:05:00.0 eth0: link up
[   13.625773] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   24.248998] systemd-logind[1040]: Failed to start unit user@1000.service: Unknown unit: user@1000.service
[   24.249006] systemd-logind[1040]: Failed to start user service: Unknown unit: user@1000.service
[   24.252540] systemd-logind[1040]: New session c2 of user john.
[   24.252557] systemd-logind[1040]: Linked /tmp/.X11-unix/X0 to /run/user/1000/X11-display.
[   25.307034] usb 2-1.7: current rate 0 is different from the runtime rate 48000
[   25.310062] usb 2-1.7: current rate 0 is different from the runtime rate 48000
[   25.320194] usb 2-1.7: current rate 0 is different from the runtime rate 48000
[   25.323306] usb 2-1.7: current rate 0 is different from the runtime rate 48000
[   40.296323] show_signal_msg: 93 callbacks suppressed
[   40.296328] chromium-browse[3379]: segfault at 1f8 ip 00007fe9d968c63f sp 00007fff4c858880 error 4 in i965_dri.so[7fe9d9339000+51c000]
[   40.658348] chromium-browse[3485]: segfault at 1f8 ip 00007febab58963f sp 00007ffff5b66a80 error 4 in i965_dri.so[7febab236000+51c000]
[   40.912445] audit: type=1400 audit(1414543490.670:43): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=3517 comm="apparmor_parser"
[   40.912455] audit: type=1400 audit(1414543490.670:44): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=3517 comm="apparmor_parser"
[   40.932719] audit: type=1400 audit(1414543490.694:45): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="third_party" pid=3517 comm="apparmor_parser"
[   41.016704] chromium-browse[3501]: segfault at 1f8 ip 00007f605448763f sp 00007fffbd941760 error 4 in i965_dri.so[7f6054134000+51c000]