ubuntu 真的很慢，vlc 平均消耗 50% 的 CPU，有时甚至会飙升到 100% 以上，而且当我播放 1080 youtube 视频时，笔记本电脑（部分）没有响应。
➜ ~ sudo lshw
linuxbox
description: Notebook
product: 20157 (System SKUNumber)
vendor: LENOVO
version: Lenovo G580
serial: WB06808388WB0206130J
width: 64 bits
capabilities: smbios-2.7 dmi-2.7 vsyscall32
configuration: administrator_password=unknown boot=normal chassis=notebook family=ChiefRiver System frontpanel_password=unknown keyboard_password=unknown power-on_password=unknown sku=System SKUNumber uuid=077173A0-B66B-11E1-924E-8C060B8953EF
*-core
description: Motherboard
product: Emerald Lake 2
vendor: LENOVO
physical id: 0
version: FAB1
serial: WB06808388
slot: Part Component
*-firmware
description: BIOS
vendor: LENOVO
physical id: 0
version: 62CN40WW
date: 07/27/2012
size: 128KiB
capacity: 4032KiB
capabilities: pci upgrade shadowing cdboot bootselect edd int5printscreen int9keyboard int14serial int17printer int10video pc98 acpi usb biosbootspecification netboot uefi
*-cpu
description: CPU
product: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
serial: To Be Filled By O.E.M.
slot: CPU Socket - U3E1
size: 2652MHz
capacity: 3100MHz
width: 64 bits
clock: 100MHz
capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm epb tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt dtherm ida arat pln pts cpufreq
configuration: cores=2 enabledcores=2 threads=4
*-cache:0
description: L1 cache
physical id: 5
slot: L1-Cache
size: 32KiB
capacity: 32KiB
capabilities: internal write-through data
configuration: level=1
*-cache:1
description: L1 cache
physical id: 6
slot: L1-Cache
size: 32KiB
capacity: 32KiB
capabilities: internal write-through instruction
configuration: level=1
*-cache:2
description: L2 cache
physical id: 7
slot: L2-Cache
size: 256KiB
capacity: 256KiB
capabilities: internal write-through unified
configuration: level=2
*-cache:3
description: L3 cache
physical id: 8
slot: L3-Cache
size: 3MiB
capacity: 3MiB
capabilities: internal write-back unified
configuration: level=3
*-memory
description: System Memory
physical id: 34
slot: System board or motherboard
size: 8GiB
*-bank:0
description: SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
product: M471B5273DH0-CK0
vendor: Samsung
physical id: 0
serial: 66649E75
slot: ChannelA-DIMM0
size: 4GiB
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:1
description: DIMM [empty]
physical id: 1
slot: ChannelA-DIMM1
*-bank:2
description: SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
product: EBJ41UF8BCS0-DJ-F
vendor: Elpida
physical id: 2
serial: 519B0EF3
slot: ChannelB-DIMM0
size: 4GiB
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:3
description: DIMM [empty]
physical id: 3
slot: ChannelB-DIMM1
*-pci
description: Host bridge
product: 3rd Gen Core processor DRAM Controller
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 09
width: 32 bits
clock: 33MHz
configuration: driver=ivb_uncore
resources: irq:0
*-pci:0
description: PCI bridge
product: Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port
vendor: Intel Corporation
physical id: 1
bus info: pci@0000:00:01.0
version: 09
width: 32 bits
clock: 33MHz
capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:24 ioport:3000(size=4096) memory:f2000000-f2ffffff ioport:e0000000(size=301989888)
*-display
description: 3D controller
product: GF117M [GeForce 610M/710M/810M/820M / GT 620M/625M/630M/720M]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=nvidia latency=0
resources: irq:31 memory:f2000000-f2ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:3000(size=128)
*-display
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:27 memory:f3000000-f33fffff memory:d0000000-dfffffff ioport:4000(size=64)
*-usb:0
description: USB controller
product: 7 Series/C210 Series Chipset Family USB xHCI Host Controller
vendor: Intel Corporation
physical id: 14
bus info: pci@0000:00:14.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pm msi xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:25 memory:f3600000-f360ffff
*-usbhost:0
product: xHCI Host Controller
vendor: Linux 4.4.0-79-generic xhci-hcd
physical id: 0
bus info: usb@4
logical name: usb4
version: 4.04
capabilities: usb-3.00
configuration: driver=hub slots=4 speed=5000Mbit/s
*-usbhost:1
product: xHCI Host Controller
vendor: Linux 4.4.0-79-generic xhci-hcd
physical id: 1
bus info: usb@3
logical name: usb3
version: 4.04
capabilities: usb-2.00
configuration: driver=hub slots=4 speed=480Mbit/s
*-communication
description: Communication controller
product: 7 Series/C210 Series Chipset Family MEI Controller #1
vendor: Intel Corporation
physical id: 16
bus info: pci@0000:00:16.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=mei_me latency=0
resources: irq:28 memory:f3615000-f361500f
*-usb:1
description: USB controller
product: 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2
vendor: Intel Corporation
physical id: 1a
bus info: pci@0000:00:1a.0
version: 04
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=0
resources: irq:16 memory:f3619000-f36193ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 4.4.0-79-generic ehci_hcd
physical id: 1
bus info: usb@1
logical name: usb1
version: 4.04
capabilities: usb-2.00
configuration: driver=hub slots=3 speed=480Mbit/s
*-usb
description: USB hub
product: Integrated Rate Matching Hub
vendor: Intel Corp.
physical id: 1
bus info: usb@1:1
version: 0.00
capabilities: usb-2.00
configuration: driver=hub slots=6 speed=480Mbit/s
*-usb
description: Generic USB device
product: BCM20702A0
vendor: Broadcom Corp
physical id: 4
bus info: usb@1:1.4
version: 1.12
serial: 08EDB99AD0FE
capabilities: usb-2.00
configuration: driver=btusb speed=12Mbit/s
*-multimedia
description: Audio device
product: 7 Series/C210 Series Chipset Family High Definition Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:29 memory:f3610000-f3613fff
*-pci:1
description: PCI bridge
product: 7 Series/C210 Series Chipset Family PCI Express Root Port 1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: c4
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16
*-pci:2
description: PCI bridge
product: 7 Series/C210 Series Chipset Family PCI Express Root Port 2
vendor: Intel Corporation
physical id: 1c.1
bus info: pci@0000:00:1c.1
version: c4
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:17 memory:f3500000-f35fffff
*-network
description: Wireless interface
product: BCM4313 802.11bgn Wireless Network Adapter
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 01
serial: 08:ed:b9:9a:d0:fd
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=6.30.223.271 (r587334) ip=192.168.0.2 latency=0 multicast=yes wireless=IEEE 802.11abg
resources: irq:17 memory:f3500000-f3503fff
*-pci:3
description: PCI bridge
product: 7 Series/C210 Series Chipset Family PCI Express Root Port 4
vendor: Intel Corporation
physical id: 1c.3
bus info: pci@0000:00:1c.3
version: c4
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:19 ioport:2000(size=4096) memory:f3400000-f34fffff
*-network
description: Ethernet interface
product: AR8162 Fast Ethernet
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:04:00.0
logical name: enp4s0
version: 10
serial: f0:de:f1:ff:11:be
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=alx latency=0 link=no multicast=yes port=twisted pair
resources: irq:30 memory:f3400000-f343ffff ioport:2000(size=128)
*-usb:2
description: USB controller
product: 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 04
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=0
resources: irq:23 memory:f3618000-f36183ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 4.4.0-79-generic ehci_hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 4.04
capabilities: usb-2.00
configuration: driver=hub slots=3 speed=480Mbit/s
*-usb
description: USB hub
product: Integrated Rate Matching Hub
vendor: Intel Corp.
physical id: 1
bus info: usb@2:1
version: 0.00
capabilities: usb-2.00
configuration: driver=hub slots=6 speed=480Mbit/s
*-usb
description: Mass storage device
product: Flash Card Reader/Writer
vendor: Generic
physical id: 6
bus info: usb@2:1.6
logical name: scsi6
version: 1.00
serial: 058F63666435
capabilities: usb-2.00 scsi emulated scsi-host
configuration: driver=usb-storage maxpower=250mA speed=480Mbit/s
*-disk
description: SCSI Disk
product: Card Reader
vendor: Multiple
physical id: 0.0.0
bus info: scsi@6:0.0.0
logical name: /dev/sdc
version: 1.00
capabilities: removable
configuration: logicalsectorsize=512 sectorsize=512
*-medium
physical id: 0
logical name: /dev/sdc
*-isa
description: ISA bridge
product: HM76 Express Chipset LPC Controller
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 04
width: 32 bits
clock: 33MHz
capabilities: isa bus_master cap_list
configuration: driver=lpc_ich latency=0
resources: irq:0
*-storage
description: SATA controller
product: 7 Series Chipset Family 6-port SATA Controller [AHCI mode]
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 04
width: 32 bits
clock: 66MHz
capabilities: storage msi pm ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=0
resources: irq:26 ioport:4088(size=8) ioport:4094(size=4) ioport:4080(size=8) ioport:4090(size=4) ioport:4060(size=32) memory:f3617000-f36177ff
*-serial UNCLAIMED
description: SMBus
product: 7 Series/C210 Series Chipset Family SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 04
width: 64 bits
clock: 33MHz
configuration: latency=0
resources: memory:f3614000-f36140ff ioport:efa0(size=32)
*-scsi:0
physical id: 1
logical name: scsi1
capabilities: emulated
*-disk
description: ATA Disk
product: ST9500325AS
vendor: Seagate
physical id: 0.0.0
bus info: scsi@1:0.0.0
logical name: /dev/sda
version: LVM1
serial: 5VEV3MZY
size: 465GiB (500GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=512 signature=179afccb
*-volume:0
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@1:0.0.0,1
logical name: /dev/sda1
logical name: /
logical name: /var/lib/docker/aufs
version: 1.0
serial: 3b7dbebd-e767-4086-96ab-c17d3dbe5f75
size: 46GiB
capacity: 46GiB
capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2017-03-19 15:00:53 filesystem=ext4 lastmountpoint=/ modified=2017-06-19 02:19:35 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,data=ordered mounted=2017-06-19 02:19:42 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@1:0.0.0,2
logical name: /dev/sda2
size: 4870MiB
capacity: 4870MiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume
description: Linux swap / Solaris partition
physical id: 5
logical name: /dev/sda5
capacity: 4870MiB
capabilities: nofs
*-volume:2
description: EXT4 volume
vendor: Linux
physical id: 3
bus info: scsi@1:0.0.0,3
logical name: /dev/sda3
logical name: /home
version: 1.0
serial: 40644ca7-3549-4753-9b09-a77a69123449
size: 414GiB
capacity: 414GiB
capabilities: primary journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2017-03-19 15:00:55 filesystem=ext4 lastmountpoint=/home modified=2017-06-19 02:19:50 mount.fstype=ext4 mount.options=rw,relatime,data=ordered mounted=2017-06-19 02:19:50 state=mounted
*-scsi:1
physical id: 2
logical name: scsi4
capabilities: emulated
*-disk
description: EXT4 volume
product: ST1000LM048-2E71
vendor: Linux
physical id: 0.0.0
bus info: scsi@4:0.0.0
logical name: /dev/sdb
logical name: /media/aeid/secondary
version: 1.0
serial: 8aecbfda-c4d7-42be-9147-27360168b4a2
size: 931GiB
capabilities: journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: ansiversion=5 created=2017-06-15 20:15:02 filesystem=ext4 label=secondary lastmountpoint=/media/aeid/secondary logicalsectorsize=512 modified=2017-06-19 02:25:38 mount.fstype=ext4 mount.options=rw,nosuid,nodev,relatime,data=ordered mounted=2017-06-19 02:25:38 sectorsize=4096 state=mounted
*-battery
product: Smart Battery
vendor: Intel Corp.
physical id: 1
version: 2008
serial: 1.0
slot: Rear
*-power UNCLAIMED
description: TBD by ODM
product: TBD by ODM
vendor: TBD by ODM
physical id: 2
version: 1.0
serial: TBD by ODM
capacity: 32768mWh
*-network DISABLED
description: Ethernet interface
physical id: 3
logical name: virbr0-nic
serial: 52:54:00:ff:45:30
size: 10Mbit/s
capabilities: ethernet physical
configuration: autonegotiation=off broadcast=yes driver=tun driverversion=1.6 duplex=full link=no multicast=yes port=twisted pair speed=10Mbit/s
简而言之，我有一个i5 3210M cpu，GeForce 610M/PCIe/SSE2 8G ram
可能是什么问题呢。