更新后，我的桌面速度慢了很多。Linux 命令和重启现在需要很长时间。Chrome 无法使用。
重启后立即输出 dmesg
[ 1.706897] sd 3:0:0:0: [sdc] Attached SCSI disk
[ 1.739718] sda: sda1 sda2 sda3
[ 1.739910] sd 0:0:0:0: [sda] Attached SCSI disk
[ 1.742924] sdb: sdb1
[ 1.743285] sd 2:0:0:0: [sdb] Attached SCSI disk
[ 2.409071] clocksource: Switched to clocksource tsc
[ 8.571900] random: nonblocking pool is initialized
[ 18.426637] EXT4-fs (sda2): mounted filesystem with ordered data mode. Opts: (null)
[ 192.814910] Adding 33200124k swap on /dev/sda3. Priority:-1 extents:1 across:33200124k FS
[ 200.721474] systemd-udevd[351]: starting version 204
[ 204.654877] video: unknown parameter 'use_native_backlight' ignored
[ 204.655379] lp: driver loaded but no devices found
[ 204.663177] ppdev: user-space parallel port driver
[ 204.749990] AVX2 version of gcm_enc/dec engaged.
[ 204.749992] AES CTR mode by8 optimization enabled
[ 204.767227] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 206.670827] [drm] Initialized drm 1.1.0 20060810
[ 219.042840] [drm] Memory usable by graphics device = 2048M
[ 219.042842] checking generic (e0000000 300000) vs hw (e0000000 10000000)
[ 219.042843] fb: switching to inteldrmfb from EFI VGA
[ 219.042900] Console: switching to colour dummy device 80x25
[ 219.042946] [drm] Replacing VGA console driver
[ 219.048336] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 219.048337] [drm] Driver supports precise vblank timestamp query.
[ 219.048640] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 219.078401] fbcon: inteldrmfb (fb0) is primary device
[ 219.078490] Console: switching to colour frame buffer device 240x67
[ 219.078505] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 219.079421] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
[ 219.079684] acpi device:5d: registered as cooling_device9
[ 219.079748] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input8
[ 219.079828] [drm] Initialized i915 1.6.0 20151010 for 0000:00:02.0 on minor 0
[ 220.161349] snd_hda_intel 0000:00:03.0: enabling device (0000 -> 0002)
[ 220.161423] snd_hda_intel 0000:00:1b.0: enabling device (0000 -> 0002)
[ 220.168798] intel_rapl: Found RAPL domain package
[ 220.168801] intel_rapl: Found RAPL domain core
[ 220.168802] intel_rapl: Found RAPL domain uncore
[ 220.168804] intel_rapl: Found RAPL domain dram
[ 220.224673] snd_hda_codec_realtek hdaudioC1D0: autoconfig for ALC892: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:line
[ 220.224675] snd_hda_codec_realtek hdaudioC1D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 220.224676] snd_hda_codec_realtek hdaudioC1D0: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
[ 220.224677] snd_hda_codec_realtek hdaudioC1D0: mono: mono_out=0x0
[ 220.224677] snd_hda_codec_realtek hdaudioC1D0: dig-out=0x1e/0x0
[ 220.224678] snd_hda_codec_realtek hdaudioC1D0: inputs:
[ 220.224679] snd_hda_codec_realtek hdaudioC1D0: Front Mic=0x19
[ 220.224680] snd_hda_codec_realtek hdaudioC1D0: Rear Mic=0x18
[ 220.224681] snd_hda_codec_realtek hdaudioC1D0: Line=0x1a
[ 220.235660] input: HDA Intel PCH Front Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input9
[ 220.235764] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input10
[ 220.235843] input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1b.0/sound/card1/input11
[ 220.235898] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[ 220.238305] input: HDA Intel PCH Line Out as /devices/pci0000:00/0000:00:1b.0/sound/card1/input12
[ 220.238355] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card1/input13
[ 220.270339] input: HDA Intel HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/sound/card0/input14
[ 220.270385] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card0/input15
[ 220.270458] input: HDA Intel HDMI HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.0/sound/card0/input16
[ 251.265339] systemd-udevd[367]: timeout: killing '/usr/sbin/alsactl -E HOME=/var/run/alsa restore 1' [539]
[ 251.265433] systemd-udevd[367]: '/usr/sbin/alsactl -E HOME=/var/run/alsa restore 1' [539] terminated by signal 9 (Killed)
[ 251.300077] systemd-udevd[369]: timeout: killing '/usr/sbin/alsactl -E HOME=/var/run/alsa restore 0' [541]
[ 251.300179] systemd-udevd[369]: '/usr/sbin/alsactl -E HOME=/var/run/alsa restore 0' [541] terminated by signal 9 (Killed)
[ 276.765663] EXT4-fs (sda2): re-mounted. Opts: errors=remount-ro
[ 279.289123] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null)
[ 291.375034] init: failsafe main process (763) killed by TERM signal
[ 313.048667] Bluetooth: Core ver 2.21
[ 313.048674] NET: Registered protocol family 31
[ 313.048675] Bluetooth: HCI device and connection manager initialized
[ 313.048677] Bluetooth: HCI socket layer initialized
[ 313.048679] Bluetooth: L2CAP socket layer initialized
[ 313.048681] Bluetooth: SCO socket layer initialized
[ 313.060312] Bluetooth: RFCOMM TTY layer initialized
[ 313.060316] Bluetooth: RFCOMM socket layer initialized
[ 313.060318] Bluetooth: RFCOMM ver 1.11
[ 317.562364] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 317.562366] Bluetooth: BNEP filters: protocol multicast
[ 317.562368] Bluetooth: BNEP socket layer initialized
[ 346.065281] init: avahi-cups-reload main process (870) terminated with status 1
[ 386.129312] audit: type=1400 audit(1505802272.153:2): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/tcpdump" pid=936 comm="apparmor_parser"
[ 386.148019] audit: type=1400 audit(1505802272.169:3): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=916 comm="apparmor_parser"
[ 386.148253] audit: type=1400 audit(1505802272.169:4): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/cupsd" pid=916 comm="apparmor_parser"
[ 386.162989] audit: type=1400 audit(1505802272.185:5): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/sbin/cups-browsed" pid=933 comm="apparmor_parser"
[ 386.190349] audit: type=1400 audit(1505802272.213:6): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/sbin/dhclient" pid=929 comm="apparmor_parser"
[ 386.190621] audit: type=1400 audit(1505802272.213:7): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=929 comm="apparmor_parser"
[ 386.190857] audit: type=1400 audit(1505802272.213:8): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=929 comm="apparmor_parser"
[ 386.204737] audit: type=1400 audit(1505802272.225:9): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/lightdm/lightdm-guest-session" pid=928 comm="apparmor_parser"
[ 386.205003] audit: type=1400 audit(1505802272.225:10): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/lightdm/lightdm-guest-session//chromium" pid=928 comm="apparmor_parser"
[ 386.229703] systemd-journald[942]: Failed to resolve 'systemd-journal' group: No such process
[ 386.236127] audit: type=1400 audit(1505802272.257:11): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=934 comm="apparmor_parser"
[ 429.172018] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 429.411029] audit_printk_skb: 36 callbacks suppressed
[ 429.411031] audit: type=1400 audit(1505802315.433:24): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cups-browsed" pid=1019 comm="apparmor_parser"
[ 430.749664] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[ 430.749667] e1000e 0000:00:19.0 eth0: 10/100 speed: disabling TSO
[ 430.749695] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 599.378881] init: plymouth-upstart-bridge main process ended, respawning
[ 599.381710] init: plymouth-upstart-bridge main process (1537) terminated with status 1
[ 599.381716] init: plymouth-upstart-bridge main process ended, respawning
[ 3950.349712] traps: unity-panel-ser[2625] trap int3 ip:7f8d68d2fc13 sp:7ffec2376550 error:0
全力输出https://paste.ubuntu.com/25570962/
我的桌面规格其实还不错。
sudo lshw -short
H/W path Device Class Description====================================================
system To Be Filled By O.E.M. (To Be Filled By O.E.M.)
/0 bus B85 Pro4
/0/0 memory 64KiB BIOS
/0/d memory 256KiB L1 cache
/0/e processor Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
/0/e/f memory 1MiB L2 cache
/0/e/10 memory 8MiB L3 cache
/0/11 memory 32GiB System Memory
/0/11/0 memory 8GiB DIMM DDR3 Synchronous 1600 MHz (0.6 ns)
/0/11/1 memory 8GiB DIMM DDR3 Synchronous 1600 MHz (0.6 ns)
/0/11/2 memory 8GiB DIMM DDR3 Synchronous 1600 MHz (0.6 ns)
/0/11/3 memory 8GiB DIMM DDR3 Synchronous 1600 MHz (0.6 ns)
/0/100 bridge 4th Gen Core Processor DRAM Controller
/0/100/2 display Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
/0/100/3 multimedia Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
/0/100/14 bus 8 Series/C220 Series Chipset Family USB xHCI
/0/100/16 communication 8 Series/C220 Series Chipset Family MEI Controller #1
/0/100/19 eth0 network Ethernet Connection I217-V
/0/100/1a bus 8 Series/C220 Series Chipset Family USB EHCI #2
/0/100/1b multimedia 8 Series/C220 Series Chipset High Definition Audio Controller
/0/100/1c bridge 8 Series/C220 Series Chipset Family PCI Express Root Port #1
/0/100/1c.2 bridge 82801 PCI Bridge
/0/100/1c.2/0 bridge ASM1083/1085 PCIe to PCI Bridge
/0/100/1d bus 8 Series/C220 Series Chipset Family USB EHCI #1
/0/100/1f bridge B85 Express LPC Controller
/0/100/1f.2 storage 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode]
/0/100/1f.3 bus 8 Series/C220 Series Chipset Family SMBus Controller
/0/1 scsi0 storage
/0/1/0.0.0 /dev/sda disk 3TB ST3000DM001-1ER1
/0/1/0.0.0/1 volume 511MiB Windows FAT volume
/0/1/0.0.0/2 /dev/sda2 volume 2762GiB EXT4 volume
/0/1/0.0.0/3 /dev/sda3 volume 31GiB Linux swap volume
/0/2 scsi2 storage
/0/2/0.0.0 /dev/sdb disk 3TB HGST HDN724030AL
/0/2/0.0.0/1 /dev/sdb1 volume 2794GiB EXT4 volume
/0/3 scsi3 storage
/0/3/0.0.0 /dev/sdc volume 2794GiB HGST HDN724030AL
/1 ham0 network Ethernet interface
RAM 和 CPU 使用率看起来不错顶部。
有什么迹象表明它为何这么慢？
提前致谢。
西蒙