笔记本在ubuntu下突然关机，求分析

[bravepetrel]

寝室熄灯后用笔记本给手机充电，同时看一个视频，没运行其他东西。突然关机后重启
没问题。cpu风扇正常，没有过热现象。
自动关机之前最后的系统日志如下，没发现特别的地方啊。。。难道是给手机充电导致
的？


Oct 24 00:20:48 bravepetrelc-Y470P goa[2071]: goa-daemon version 3.4.0
starting [main.c:112, main()]
Oct 24 00:21:39 bravepetrelc-Y470P dbus[546]: [system] Activating service
name='org.freedesktop.PackageKit' (using servicehelper)
Oct 24 00:21:40 bravepetrelc-Y470P AptDaemon: INFO: Initializing daemon
Oct 24 00:21:41 bravepetrelc-Y470P AptDaemon.PackageKit: INFO: Initializing
PackageKit compat layer
Oct 24 00:21:41 bravepetrelc-Y470P dbus[546]: [system] Successfully
activated service 'org.freedesktop.PackageKit'
Oct 24 00:21:41 bravepetrelc-Y470P AptDaemon.PackageKit: INFO: Initializing
PackageKit transaction
Oct 24 00:21:41 bravepetrelc-Y470P AptDaemon.Worker: INFO: Simulating trans:
/org/debian/apt/transaction/814746f764404a36b58fb793ee6ec960
Oct 24 00:21:41 bravepetrelc-Y470P AptDaemon.Worker: INFO: Processing
transaction /org/debian/apt/transaction/814746f764404a36b58fb793ee6ec960
Oct 24 00:21:47 bravepetrelc-Y470P AptDaemon.PackageKit: INFO: Get updates()
Oct 24 00:21:47 bravepetrelc-Y470P AptDaemon.Worker: INFO: Finished
transaction /org/debian/apt/transaction/814746f764404a36b58fb793ee6ec960
Oct 24 00:24:39 bravepetrelc-Y470P ntfs-3g[2365]: Version 2012.1.15AR.1
external FUSE 28
Oct 24 00:24:39 bravepetrelc-Y470P ntfs-3g[2365]: Mounted /dev/sda6 (Read-
Write, label "Temp", NTFS 3.1)
Oct 24 00:24:39 bravepetrelc-Y470P ntfs-3g[2365]: Cmdline options: rw,nosuid,
nodev,uhelper=udisks,uid=1000,gid=1000,dmask=0077,fmask=0177
Oct 24 00:24:39 bravepetrelc-Y470P ntfs-3g[2365]: Mount options: rw,nosuid,
nodev,uhelper=udisks,allow_other,nonempty,relatime,default_permissions,
fsname=/dev/sda6,blkdev,blksize=4096
Oct 24 00:24:39 bravepetrelc-Y470P ntfs-3g[2365]: Global ownership and
permissions enforced, configuration type 7
Oct 24 00:24:48 bravepetrelc-Y470P kernel: [ 293.799838] EXT4-fs (sda9):
mounted filesystem with ordered data mode. Opts: (null)
Oct 24 00:25:21 bravepetrelc-Y470P ntfs-3g[2380]: Version 2012.1.15AR.1
external FUSE 28
Oct 24 00:25:21 bravepetrelc-Y470P ntfs-3g[2380]: Mounted /dev/sda5 (Read-
Write, label "Data", NTFS 3.1)
Oct 24 00:25:21 bravepetrelc-Y470P ntfs-3g[2380]: Cmdline options: rw,nosuid,
nodev,uhelper=udisks,uid=1000,gid=1000,dmask=0077,fmask=0177
Oct 24 00:25:21 bravepetrelc-Y470P ntfs-3g[2380]: Mount options: rw,nosuid,
nodev,uhelper=udisks,allow_other,nonempty,relatime,default_permissions,
fsname=/dev/sda5,blkdev,blksize=4096
Oct 24 00:25:21 bravepetrelc-Y470P ntfs-3g[2380]: Global ownership and
permissions enforced, configuration type 7
Oct 24 00:27:41 bravepetrelc-Y470P AptDaemon: INFO: Quitting due to
inactivity
Oct 24 00:27:41 bravepetrelc-Y470P AptDaemon: INFO: Quitting was requested
Oct 24 00:30:08 bravepetrelc-Y470P kernel: [ 612.493747] usb 2-1.3: USB
disconnect, device number 7
Oct 24 00:30:08 bravepetrelc-Y470P kernel: [ 612.708094] usb 2-1.3: new
full-speed USB device number 8 using ehci_hcd
Oct 24 00:30:08 bravepetrelc-Y470P kernel: [ 612.724317] hub 2-1:1.0:
unable to enumerate USB device on port 3
Oct 24 00:30:08 bravepetrelc-Y470P kernel: [ 613.275603] hub 2-1:1.0:
unable to enumerate USB device on port 3
Oct 24 00:30:09 bravepetrelc-Y470P kernel: [ 613.714869] usb 2-1.3: new
full-speed USB device number 10 using ehci_hcd
Oct 24 00:30:09 bravepetrelc-Y470P mtp-probe: checking bus 2, device 10: "/
sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3"
Oct 24 00:30:09 bravepetrelc-Y470P kernel: [ 613.810541] scsi7 : usb-
storage 2-1.3:1.0
Oct 24 00:30:09 bravepetrelc-Y470P mtp-probe: bus: 2, device: 10 was not an
MTP device
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.810861] scsi 7:0:0:0:
Direct-Access BBK FLASH DISK PQ: 0 ANSI: 0 CCS
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.811836] scsi 7:0:0:1:
Direct-Access BBK FLASH DISK PQ: 0 ANSI: 0 CCS
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.813427] sd 7:0:0:0:
Attached scsi generic sg2 type 0
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.813884] sd 7:0:0:1:
Attached scsi generic sg3 type 0
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.815011] sd 7:0:0:0: [sdb]
1968128 512-byte logical blocks: (1.00 GB/961 MiB)
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.816186] sd 7:0:0:1: [sdc]
249856 512-byte logical blocks: (127 MB/122 MiB)
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.817505] sd 7:0:0:0: [sdb]
Write Protect is off
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.817518] sd 7:0:0:0: [sdb]
Mode Sense: 03 00 00 00
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.818240] sd 7:0:0:1: [sdc]
Write Protect is off
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.818253] sd 7:0:0:1: [sdc]
Mode Sense: 03 00 00 00
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.819118] sd 7:0:0:0: [sdb]
No Caching mode page present
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.819130] sd 7:0:0:0: [sdb]
Assuming drive cache: write through
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.819868] sd 7:0:0:1: [sdc]
No Caching mode page present
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.819879] sd 7:0:0:1: [sdc]
Assuming drive cache: write through
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.826462] sd 7:0:0:0: [sdb]
No Caching mode page present
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.826471] sd 7:0:0:0: [sdb]
Assuming drive cache: write through
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.827107] sd 7:0:0:1: [sdc]
No Caching mode page present
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.827117] sd 7:0:0:1: [sdc]
Assuming drive cache: write through
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.836197] sdb: sdb1
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.842482] sdc: sdc1
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.847939] sd 7:0:0:0: [sdb]
No Caching mode page present
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.847951] sd 7:0:0:0: [sdb]
Assuming drive cache: write through
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.847958] sd 7:0:0:0: [sdb]
Attached SCSI removable disk
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.849716] sd 7:0:0:1: [sdc]
No Caching mode page present
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.849729] sd 7:0:0:1: [sdc]
Assuming drive cache: write through
Oct 24 00:30:10 bravepetrelc-Y470P kernel: [ 614.849738] sd 7:0:0:1: [sdc]
Attached SCSI removable disk