除了鼠标移动之外，屏幕都冻结了，我用++Ctrl进入虚拟tty并重新运行Unity，桌面就解冻了。Altf2
这是我的 /var/log/syslog 的尾部：
praveen@praveen-XPS-L412Z:~$ tail -f /var/log/syslog
Jun 10 11:17:01 praveen-XPS-L412Z CRON[25625]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Jun 10 11:22:15 praveen-XPS-L412Z kernel: [ 6184.595684] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
Jun 10 11:22:15 praveen-XPS-L412Z kernel: [ 6184.595690] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
Jun 10 11:23:17 praveen-XPS-L412Z gnome-session[7781]: WARNING: Application 'compiz.desktop' killed by signal 9
Jun 10 11:23:17 praveen-XPS-L412Z gnome-session[7781]: WARNING: App 'compiz.desktop' respawning too quickly
Jun 10 11:23:17 praveen-XPS-L412Z gnome-session[7781]: CRITICAL: We failed, but the fail whale is dead. Sorry....
Jun 10 11:23:18 praveen-XPS-L412Z gnome-session[7781]: WARNING: App 'compiz.desktop' respawning too quickly
当此问题再次发生时，请让我知道永久的解决方法。