Перезагрузка / завершение работы

У меня Ubuntu 11.10 (Oneiric Ocelot) на моем ПК. ПК имеет материнскую плату Intel DH61CR. Всякий раз, когда я пытаюсь перезагрузить или выключить свой компьютер, он замерзнет, ​​просматривая только логотип Ubuntu с белыми точками под ним на фиолетовом фоне. Я всегда должен использовать кнопку физического сброса или закрытия, чтобы делать то, что хочу.

kern.log:

Oct 17 14:37:35 ruberoid kernel: [11046.996931] init: tty4 main process (967) killed by TERM signal
Oct 17 14:37:35 ruberoid kernel: [11046.997074] init: tty5 main process (973) killed by TERM signal
Oct 17 14:37:35 ruberoid kernel: [11046.997202] init: tty2 main process (979) killed by TERM signal
Oct 17 14:37:35 ruberoid kernel: [11046.997327] init: tty3 main process (980) killed by TERM signal
Oct 17 14:37:35 ruberoid kernel: [11046.997525] init: tty6 main process (982) killed by TERM signal
Oct 17 14:37:35 ruberoid kernel: [11046.997730] init: irqbalance main process (1000) killed by TERM signal
Oct 17 14:37:35 ruberoid kernel: [11046.997871] init: cron main process (1010) killed by TERM signal
Oct 17 14:37:35 ruberoid kernel: [11046.998227] init: tty1 main process (1261) killed by TERM signal
Oct 17 14:37:35 ruberoid kernel: [11047.024385] init: plymouth-upstart-bridge main process (25537) terminated with status 1
Oct 17 14:37:35 ruberoid kernel: Kernel logging (proc) stopped.

dmesg

[   12.946207] type=1400 audit(1318840388.898:8): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient" pid=894 comm="apparmor_parser"
[   12.946437] type=1400 audit(1318840388.898:9): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=894 comm="apparmor_parser"
[   12.946577] type=1400 audit(1318840388.898:10): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=894 comm="apparmor_parser"
[   12.946679] type=1400 audit(1318840388.898:11): apparmor="STATUS" operation="profile_load" name="/usr/lib/cups/backend/cups-pdf" pid=898 comm="apparmor_parser"
[   13.052754] vesafb: mode is 1400x1050x32, linelength=5632, pages=0
[   13.052755] vesafb: scrolling: redraw
[   13.052757] vesafb: Truecolor: size=0:8:8:8, shift=0:16:8:0
[   13.056229] vesafb: framebuffer at 0xe0000000, mapped to 0xffffc90006e00000, using 5824k, total 5824k
[   13.056319] Console: switching to colour frame buffer device 175x65
[   13.056334] fb0: VESA VGA frame buffer device
[   13.574711] init: failsafe main process (857) killed by TERM signal
[   13.574991] init: apport pre-start process (969) terminated with status 1
[   13.578789] init: apport post-stop process (994) terminated with status 1