我有一台 hp pavilion 笔记本电脑，配有 2gb 内存、intel i3 和 500gb 硬盘，启动时间太长（>20 秒）。尝试了预加载、e4rat、e4defrag 等，但仍然没有改善，下面是我的 dmesg 输出
-------------start of dmesg removed due to word limit--------------------
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.106596] x86: Booting SMP configuration:
[ 0.374263] pci 0000:00:02.0: Video device with shadowed ROM
[ 0.846671] PCI: CLS 64 bytes, default 64
[ 0.846720] Trying to unpack rootfs image as initramfs...
[ 1.257128] Freeing initrd memory: 25688K (ffff880034dc4000 - ffff8800366da000)
[ 1.257138] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[ 1.257141] software IO TLB [mem 0x696c0000-0x6d6c0000] (64MB) mapped at [ffff8800696c0000-ffff88006d6bffff]
[ 1.257205] Simple Boot Flag at 0x44 set to 0x1
[ 1.257382] microcode: CPU0 sig=0x206a7, pf=0x10, revision=0x28
[ 1.257391] microcode: CPU1 sig=0x206a7, pf=0x10, revision=0x28
[ 1.257400] microcode: CPU2 sig=0x206a7, pf=0x10, revision=0x28
[ 1.257409] microcode: CPU3 sig=0x206a7, pf=0x10, revision=0x28
[ 1.257461] microcode: Microcode Update Driver: v2.00 <[email protected]>, Peter Oruba
[ 1.257465] Scanning for low memory corruption every 60 seconds
[ 1.257737] Initialise system trusted keyring
[ 1.257785] audit: initializing netlink socket (disabled)
[ 1.257796] type=2000 audit(1429192879.232:1): initialized
[ 1.284062] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ 1.284935] zbud: loaded
[ 1.285076] VFS: Disk quotas dquot_6.5.2
[ 1.285119] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ 1.285483] fuse init (API version 7.22)
[ 1.285548] msgmni has been set to 3644
[ 1.285598] Key type big_key registered
[ 1.286008] Key type asymmetric registered
[ 1.286011] Asymmetric key parser 'x509' registered
[ 1.286038] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[ 1.286070] io scheduler noop registered
[ 1.286073] io scheduler deadline registered (default)
[ 1.286095] io scheduler cfq registered
[ 1.286160] pcieport 0000:00:01.0: device [8086:0101] has invalid IRQ; check vendor BIOS
[ 1.286274] pcieport 0000:00:01.0: irq 40 for MSI/MSI-X
[ 1.286308] pcieport 0000:00:1c.0: device [8086:1e10] has invalid IRQ; check vendor BIOS
[ 1.286413] pcieport 0000:00:1c.1: device [8086:1e12] has invalid IRQ; check vendor BIOS
[ 1.286514] pcieport 0000:00:1c.2: device [8086:1e14] has invalid IRQ; check vendor BIOS
[ 1.286630] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ 1.286643] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[ 1.286676] efifb: probing for efifb
[ 1.287099] efifb: framebuffer at 0x90000000, mapped to 0xffffc90010400000, using 4160k, total 4160k
[ 1.287103] efifb: mode is 1366x768x32, linelength=5504, pages=1
[ 1.287104] efifb: scrolling: redraw
[ 1.287107] efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0
[ 1.289654] Console: switching to colour frame buffer device 170x48
[ 1.292128] fb0: EFI VGA frame buffer device
[ 1.292157] intel_idle: MWAIT substates: 0x21120
[ 1.292158] intel_idle: v0.4 model 0x2A
[ 1.292160] intel_idle: lapic_timer_reliable_states 0xffffffff
[ 1.292250] ipmi message handler version 39.2
[ 1.292502] ACPI: Deprecated procfs I/F for AC is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared
[ 1.292749] ACPI: AC Adapter [ACAD] (off-line)
[ 1.292845] input: Lid Switch as /devices/LNXSYSTM:00/device:00/PNP0C0D:00/input/input0
[ 1.293592] ACPI: Lid Switch [LID0]
[ 1.293637] input: Power Button as /devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input1
[ 1.293672] ACPI: Power Button [PWRB]
[ 1.293720] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input2
[ 1.293750] ACPI: Power Button [PWRF]
[ 1.294219] [Firmware Bug]: Invalid critical threshold (0)
[ 1.295132] thermal LNXTHERM:00: registered as thermal_zone0
[ 1.295156] ACPI: Thermal Zone [TZ01] (0 C)
[ 1.295194] GHES: HEST is not enabled!
[ 1.295287] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
[ 1.297057] Linux agpgart interface v0.103
[ 1.298234] brd: module loaded
[ 1.298854] loop: module loaded
[ 1.299155] libphy: Fixed MDIO Bus: probed
[ 1.299240] tun: Universal TUN/TAP device driver, 1.6
[ 1.299261] tun: (C) 1999-2004 Max Krasnyansky <[email protected]>
[ 1.299328] PPP generic driver version 2.4.2
[ 1.299391] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.300382] ehci-pci: EHCI PCI platform driver
[ 1.301485] ehci-pci 0000:00:1a.0: EHCI Host Controller
[ 1.302483] ehci-pci 0000:00:1a.0: new USB bus registered, assigned bus number 1
[ 1.303498] ehci-pci 0000:00:1a.0: debug port 2
[ 1.308398] ehci-pci 0000:00:1a.0: cache line size of 64 is not supported
[ 1.308415] ehci-pci 0000:00:1a.0: irq 16, io mem 0xa3619000
[ 1.318857] ehci-pci 0000:00:1a.0: USB 2.0 started, EHCI 1.00
[ 1.319877] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.320875] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.321870] usb usb1: Product: EHCI Host Controller
[ 1.322856] usb usb1: Manufacturer: Linux 3.13.0-49-generic ehci_hcd
[ 1.323844] usb usb1: SerialNumber: 0000:00:1a.0
[ 1.324908] hub 1-0:1.0: USB hub found
[ 1.325873] hub 1-0:1.0: 2 ports detected
[ 1.326981] ehci-pci 0000:00:1d.0: EHCI Host Controller
[ 1.327925] ehci-pci 0000:00:1d.0: new USB bus registered, assigned bus number 2
[ 1.328876] ehci-pci 0000:00:1d.0: debug port 2
[ 1.333716] ehci-pci 0000:00:1d.0: cache line size of 64 is not supported
[ 1.333731] ehci-pci 0000:00:1d.0: irq 20, io mem 0xa3618000
[ 1.342879] ehci-pci 0000:00:1d.0: USB 2.0 started, EHCI 1.00
[ 1.343824] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.344741] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.345652] usb usb2: Product: EHCI Host Controller
[ 1.346551] usb usb2: Manufacturer: Linux 3.13.0-49-generic ehci_hcd
[ 1.347466] usb usb2: SerialNumber: 0000:00:1d.0
[ 1.348460] hub 2-0:1.0: USB hub found
[ 1.349364] hub 2-0:1.0: 2 ports detected
[ 1.350328] ehci-platform: EHCI generic platform driver
[ 1.351238] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.352127] ohci-pci: OHCI PCI platform driver
[ 1.353011] ohci-platform: OHCI generic platform driver
[ 1.353337] ACPI: Deprecated procfs I/F for battery is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared
[ 1.353341] ACPI: Battery Slot [BAT0] (battery present)
[ 1.355656] uhci_hcd: USB Universal Host Controller Interface driver
[ 1.356635] xhci_hcd 0000:00:14.0: xHCI Host Controller
[ 1.357511] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 3
[ 1.358483] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
[ 1.358507] xhci_hcd 0000:00:14.0: irq 41 for MSI/MSI-X
[ 1.358566] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.359458] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.360344] usb usb3: Product: xHCI Host Controller
[ 1.361215] usb usb3: Manufacturer: Linux 3.13.0-49-generic xhci_hcd
[ 1.362099] usb usb3: SerialNumber: 0000:00:14.0
[ 1.363071] hub 3-0:1.0: USB hub found
[ 1.363953] hub 3-0:1.0: 4 ports detected
[ 1.365106] xhci_hcd 0000:00:14.0: xHCI Host Controller
[ 1.365989] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 4
[ 1.366920] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003
[ 1.367818] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.368715] usb usb4: Product: xHCI Host Controller
[ 1.369605] usb usb4: Manufacturer: Linux 3.13.0-49-generic xhci_hcd
[ 1.370495] usb usb4: SerialNumber: 0000:00:14.0
[ 1.371473] hub 4-0:1.0: USB hub found
[ 1.372363] hub 4-0:1.0: 4 ports detected
[ 1.378969] i8042: PNP: PS/2 Controller [PNP0303:PS2K,PNP0f13:PS2M] at 0x60,0x64 irq 1,12
[ 1.387947] serio: i8042 KBD port at 0x60,0x64 irq 1
[ 1.388847] serio: i8042 AUX port at 0x60,0x64 irq 12
[ 1.389843] mousedev: PS/2 mouse device common for all mice
[ 1.390890] rtc_cmos 00:05: RTC can wake from S4
[ 1.391907] rtc_cmos 00:05: rtc core: registered rtc_cmos as rtc0
[ 1.392823] rtc_cmos 00:05: alarms up to one month, 242 bytes nvram, hpet irqs
[ 1.393770] device-mapper: uevent: version 1.0.3
[ 1.394721] device-mapper: ioctl: 4.27.0-ioctl (2013-10-30) initialised: [email protected]
[ 1.395652] ledtrig-cpu: registered to indicate activity on CPUs
[ 1.396572] EFI Variables Facility v0.08 2004-May-17
[ 1.404768] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input3
[ 1.639204] usb 1-1: new high-speed USB device number 2 using ehci-pci
[ 1.799651] usb 1-1: New USB device found, idVendor=8087, idProduct=0024
[ 1.800605] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 1.801806] hub 1-1:1.0: USB hub found
[ 1.802908] hub 1-1:1.0: 6 ports detected
[ 1.915399] usb 2-1: new high-speed USB device number 2 using ehci-pci
[ 2.075887] usb 2-1: New USB device found, idVendor=8087, idProduct=0024
[ 2.076846] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 2.078042] hub 2-1:1.0: USB hub found
[ 2.079134] hub 2-1:1.0: 6 ports detected
[ 2.151709] usb 1-1.3: new full-speed USB device number 3 using ehci-pci
[ 2.293441] TCP: cubic registered
[ 2.294476] NET: Registered protocol family 10
[ 2.295580] NET: Registered protocol family 17
[ 2.295696] tsc: Refined TSC clocksource calibration: 2394.560 MHz
[ 2.297494] Key type dns_resolver registered
[ 2.298823] Loading compiled-in X.509 certificates
[ 2.299416] usb 1-1.3: New USB device found, idVendor=0a5c, idProduct=21e3
[ 2.299417] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2.299418] usb 1-1.3: Product: BCM20702A0
[ 2.299419] usb 1-1.3: Manufacturer: Broadcom Corp
[ 2.299420] usb 1-1.3: SerialNumber: C01885FFF2EE
[ 2.305262] Loaded X.509 cert 'Magrathea: Glacier signing key: 6fca287c2573d09ca32c1980c0d763777a63d4f5'
[ 2.306210] registered taskstats version 1
[ 2.309573] Key type trusted registered
[ 2.313794] Key type encrypted registered
[ 2.314731] AppArmor: AppArmor sha1 policy hashing enabled
[ 2.315665] IMA: No TPM chip found, activating TPM-bypass!
[ 2.317050] regulator-dummy: disabling
[ 2.318047] Magic number: 11:634:30
[ 2.319073] rtc_cmos 00:05: setting system clock to 2015-04-16 14:01:20 UTC (1429192880)
[ 2.320627] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
[ 2.321570] EDD information not available.
[ 2.322553] PM: Hibernation image not present or could not be loaded.
[ 2.323947] Freeing unused kernel memory: 1340K (ffffffff81d20000 - ffffffff81e6f000)
[ 2.324907] Write protecting the kernel read-only data: 12288k
[ 2.327933] Freeing unused kernel memory: 796K (ffff880002739000 - ffff880002800000)
[ 2.330561] Freeing unused kernel memory: 688K (ffff880002b54000 - ffff880002c00000)
[ 2.351131] systemd-udevd[139]: starting version 204
[ 2.372874] wmi: Mapper loaded
[ 2.374809] rtsx_pci 0000:09:00.0: irq 42 for MSI/MSI-X
[ 2.374846] rtsx_pci 0000:09:00.0: rtsx_pci_acquire_irq: pcr->msi_en = 1, pci->irq = 42
[ 2.376100] usb 2-1.5: new high-speed USB device number 3 using ehci-pci
[ 2.378304] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
[ 2.378305] [drm] Initialized drm 1.1.0 20060810
[ 2.381666] r8169 0000:08:00.0: can't disable ASPM; OS doesn't have ASPM control
[ 2.384110] r8169 0000:08:00.0: irq 43 for MSI/MSI-X
[ 2.384308] r8169 0000:08:00.0 eth0: RTL8105e at 0xffffc90000358000, 80:c1:6e:5d:f3:78, XID 00c00000 IRQ 43
[ 2.386121] ahci 0000:00:1f.2: version 3.0
[ 2.386248] ahci 0000:00:1f.2: irq 44 for MSI/MSI-X
[ 2.399803] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x11 impl SATA mode
[ 2.401350] ahci 0000:00:1f.2: flags: 64bit ncq pm led clo pio slum part ems apst
[ 2.408447] scsi0 : ahci
[ 2.410018] scsi1 : ahci
[ 2.411483] scsi2 : ahci
[ 2.413437] scsi3 : ahci
[ 2.414510] scsi4 : ahci
[ 2.415556] scsi5 : ahci
[ 2.416866] ata1: SATA max UDMA/133 abar m2048@0xa3617000 port 0xa3617100 irq 44
[ 2.417794] ata2: DUMMY
[ 2.418838] ata3: DUMMY
[ 2.419739] ata4: DUMMY
[ 2.420623] ata5: SATA max UDMA/133 abar m2048@0xa3617000 port 0xa3617300 irq 44
[ 2.421651] ata6: DUMMY
[ 2.423409] [drm] Memory usable by graphics device = 2048M
[ 2.424498] checking generic (90000000 410000) vs hw (90000000 10000000)
[ 2.424500] fb: conflicting fb hw usage inteldrmfb vs EFI VGA - removing generic driver
[ 2.425460] Console: switching to colour dummy device 80x25
[ 2.475970] i915 0000:00:02.0: irq 45 for MSI/MSI-X
[ 2.475981] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 2.475986] [drm] Driver supports precise vblank timestamp query.
[ 2.476102] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=none:owns=none
[ 2.504059] [drm] Wrong MCH_SSKPD value: 0x16040307
[ 2.504067] [drm] This can cause pipe underruns and display issues.
[ 2.504070] [drm] Please upgrade your BIOS to fix this.
[ 2.516614] usb 2-1.5: New USB device found, idVendor=04f2, idProduct=b2f4
[ 2.516620] usb 2-1.5: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[ 2.516623] usb 2-1.5: Product: HP Webcam-50
[ 2.516625] usb 2-1.5: Manufacturer: Chicony Electronics Co.,Ltd.
[ 2.516628] usb 2-1.5: SerialNumber: 0x0001
[ 2.521879] fbcon: inteldrmfb (fb0) is primary device
[ 2.740181] ata5: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[ 2.748182] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 2.749573] ata5.00: ATAPI: hp DVD-RAM UJ8B1, H.04, max UDMA/100
[ 2.749692] ata1.00: ATA-8: Hitachi HTS547550A9E384, JE3OA50A, max UDMA/100
[ 2.749696] ata1.00: 976773168 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
[ 2.751269] ata1.00: configured for UDMA/100
[ 2.751504] scsi 0:0:0:0: Direct-Access ATA Hitachi HTS54755 JE3O PQ: 0 ANSI: 5
[ 2.751648] sd 0:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/465 GiB)
[ 2.751650] sd 0:0:0:0: [sda] 4096-byte physical blocks
[ 2.751663] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 2.751702] sd 0:0:0:0: [sda] Write Protect is off
[ 2.751704] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[ 2.751732] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 2.759541] ata5.00: configured for UDMA/100
[ 2.773983] scsi 4:0:0:0: CD-ROM hp DVD-RAM UJ8B1 H.04 PQ: 0 ANSI: 5
[ 2.789193] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[ 2.789194] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 2.789337] sr 4:0:0:0: Attached scsi CD-ROM sr0
[ 2.789420] sr 4:0:0:0: Attached scsi generic sg1 type 5
[ 2.807831] sda: sda1 sda2 sda3
[ 2.808181] sd 0:0:0:0: [sda] Attached SCSI disk
[ 3.121814] random: lvm urandom read with 66 bits of entropy available
[ 3.204618] Console: switching to colour frame buffer device 170x48
[ 3.207574] psmouse serio1: synaptics: Touchpad model: 1, fw: 7.5, id: 0x1e0b1, caps: 0xf00173/0x240000/0xa2400, board id: 2068, fw id: 1028260
[ 3.207716] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[ 3.208723] i915 0000:00:02.0: registered panic notifier
[ 3.209892] [Firmware Bug]: ACPI(PEGP) defines _DOD but not _DOS
[ 3.217275] ACPI: Video Device [PEGP] (multi-head: yes rom: no post: no)
[ 3.234539] acpi device:05: registered as cooling_device4
[ 3.235625] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:03/LNXVIDEO:00/input/input6
[ 3.237541] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no)
[ 3.240769] acpi device:0e: registered as cooling_device5
[ 3.241932] input: Video Bus as /devices/LNXSYSTM:00/device:00/PNP0A08:00/LNXVIDEO:01/input/input7
[ 3.243190] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[ 3.247437] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input5
[ 3.296745] Switched to clocksource tsc
[ 3.313559] bio: create slab <bio-1> at 1
[ 3.841406] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 8.798811] EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: (null)
[ 8.983791] random: nonblocking pool is initialized
[ 10.202240] init: Failed to spawn ureadahead main process: unable to execute: No such file or directory
[ 12.681988] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 12.782346] EXT4-fs (dm-0): re-mounted. Opts: errors=remount-ro
[ 13.055280] systemd-udevd[395]: starting version 204
[ 13.297936] EXT4-fs (sda2): mounting ext2 file system using the ext4 subsystem
[ 13.344852] EXT4-fs (sda2): mounted filesystem without journal. Opts: (null)
[ 13.517202] init: ureadahead-other main process (424) terminated with status 127
[ 14.026644] init: ureadahead-other main process (434) terminated with status 127
[ 14.124530] lp: driver loaded but no devices found
[ 14.159049] ppdev: user-space parallel port driver
[ 14.947138] Initializing HPQ6001 module
[ 14.947245] input: HP Wireless hotkeys as /devices/virtual/input/input8
[ 14.970860] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[ 14.978006] ACPI Warning: 0x0000000000000428-0x000000000000042f SystemIO conflicts with Region \PMIO 1 (20131115/utaddress-251)
[ 14.978015] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 14.978021] ACPI Warning: 0x0000000000000530-0x000000000000053f SystemIO conflicts with Region \GPIO 1 (20131115/utaddress-251)
[ 14.978026] ACPI Warning: 0x0000000000000530-0x000000000000053f SystemIO conflicts with Region \_SB_.PCI0.PEG0.PEGP.GPIO 2 (20131115/utaddress-251)
[ 14.978031] ACPI Warning: 0x0000000000000530-0x000000000000053f SystemIO conflicts with Region \_SB_.PCI0.LPCB.GPIO 3 (20131115/utaddress-251)
[ 14.978035] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 14.978037] ACPI Warning: 0x0000000000000500-0x000000000000052f SystemIO conflicts with Region \GPIO 1 (20131115/utaddress-251)
[ 14.978041] ACPI Warning: 0x0000000000000500-0x000000000000052f SystemIO conflicts with Region \_SB_.PCI0.PEG0.PEGP.GPIO 2 (20131115/utaddress-251)
[ 14.978046] ACPI Warning: 0x0000000000000500-0x000000000000052f SystemIO conflicts with Region \_SB_.PCI0.LPCB.GPIO 3 (20131115/utaddress-251)
[ 14.978050] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 14.978052] lpc_ich: Resource conflict(s) found affecting gpio_ich
[ 15.271791] AMD IOMMUv2 driver by Joerg Roedel <[email protected]>
[ 15.271797] AMD IOMMUv2 functionality not available on this system
[ 15.272269] cfg80211: Calling CRDA to update world regulatory domain
[ 15.291567] hp_accel: laptop model unknown, using default axes configuration
[ 15.299155] lis3lv02d: 8 bits 3DC sensor found
[ 15.303743] mei_me 0000:00:16.0: irq 46 for MSI/MSI-X
[ 15.346923] input: ST LIS3LV02DL Accelerometer as /devices/platform/lis3lv02d/input/input9
[ 15.481627] fglrx: module license 'Proprietary. (C) 2002 - ATI Technologies, Starnberg, GERMANY' taints kernel.
[ 15.481630] Disabling lock debugging due to kernel taint
[ 15.486177] fglrx: module verification failed: signature and/or required key missing - tainting kernel
[ 15.491880] <6>[fglrx] Maximum main memory to use for locked dma buffers: 1706 MBytes.
[ 15.492070] <6>[fglrx] vendor: 1002 device: 6840 count: 1
[ 15.492302] <6>[fglrx] ioport: bar 4, base 0x4000, size: 0x100
[ 15.492310] pci 0000:01:00.0: enabling device (0000 -> 0003)
[ 15.492438] <6>[fglrx] Kernel PAT support is enabled
[ 15.492458] <6>[fglrx] module loaded - fglrx 13.35.5 [Mar 12 2014] with 1 minors
[ 15.685315] kvm: disabled by bios
[ 15.841610] wlan0: Broadcom BCM4727 802.11 Hybrid Wireless Controller 6.30.223.248 (r487574)
[ 16.001042] input: HP WMI hotkeys as /devices/virtual/input/input10
[ 16.037345] Bluetooth: Core ver 2.17
[ 16.037367] NET: Registered protocol family 31
[ 16.037369] Bluetooth: HCI device and connection manager initialized
[ 16.037378] Bluetooth: HCI socket layer initialized
[ 16.037381] Bluetooth: L2CAP socket layer initialized
[ 16.037387] Bluetooth: SCO socket layer initialized
[ 16.069471] snd_hda_intel 0000:00:1b.0: irq 47 for MSI/MSI-X
[ 16.118778] usbcore: registered new interface driver btusb
[ 16.173594] usb 1-1.3: Direct firmware load failed with error -2
[ 16.173598] usb 1-1.3: Falling back to user helper
[ 16.174159] Bluetooth: can't load firmware, may not work correctly
[ 16.236072] mute LED gpio 10 polarity 0
[ 16.236241] autoconfig: line_outs=1 (0xd/0x0/0x0/0x0/0x0) type:speaker
[ 16.236244] speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[ 16.236247] hp_outs=1 (0xb/0x0/0x0/0x0/0x0)
[ 16.236248] mono: mono_out=0x0
[ 16.236249] inputs:
[ 16.236252] Internal Mic=0x11
[ 16.236254] Mic=0xc
[ 16.241899] Linux video capture interface: v2.00
[ 16.277920] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1b.0/sound/card0/input13
[ 16.278015] input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12
[ 16.278094] input: HDA Intel PCH Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11
[ 16.515273] cfg80211: World regulatory domain updated:
[ 16.515278] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[ 16.515280] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 16.515281] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 16.515283] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[ 16.515284] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 16.515286] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[ 16.569454] uvcvideo: Found UVC 1.00 device HP Webcam-50 (04f2:b2f4)
[ 16.576999] input: HP Webcam-50 as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/input/input14
[ 16.577080] usbcore: registered new interface driver uvcvideo
[ 16.577082] USB Video Class driver (1.1.1)
[ 16.604280] type=1400 audit(1429192894.771:2): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/sbin/dhclient" pid=584 comm="apparmor_parser"
[ 16.604290] type=1400 audit(1429192894.771:3): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=584 comm="apparmor_parser"
[ 16.604296] type=1400 audit(1429192894.771:4): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=584 comm="apparmor_parser"
[ 16.604305] type=1400 audit(1429192894.771:5): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/sbin/dhclient" pid=583 comm="apparmor_parser"
[ 16.604313] type=1400 audit(1429192894.771:6): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=583 comm="apparmor_parser"
[ 16.604320] type=1400 audit(1429192894.771:7): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=583 comm="apparmor_parser"
[ 16.604621] type=1400 audit(1429192894.771:8): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/sbin/dhclient" pid=615 comm="apparmor_parser"
[ 16.604628] type=1400 audit(1429192894.771:9): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=615 comm="apparmor_parser"
[ 16.604633] type=1400 audit(1429192894.771:10): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/connman/scripts/dhclient-script" pid=615 comm="apparmor_parser"
[ 16.604911] type=1400 audit(1429192894.771:11): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=584 comm="apparmor_parser"
[ 18.059207] init: avahi-cups-reload main process (705) terminated with status 1
[ 20.204542] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 20.204546] Bluetooth: BNEP filters: protocol multicast
[ 20.204555] Bluetooth: BNEP socket layer initialized
[ 20.218797] Bluetooth: RFCOMM TTY layer initialized
[ 20.218810] Bluetooth: RFCOMM socket layer initialized
[ 20.218814] Bluetooth: RFCOMM ver 1.11
答案1
到目前为止，您似乎还省略了另一种方法：GRUB 分析：
您可以告诉 GRUB 创建一个配置文件，其中包含启动操作系统时需要加载的驱动程序，而不是让它在每次启动时搜索它。
为此，请/etc/default/grub使用提升的权限打开该文件，并将以下行
GRUB_CMDLINE_LINUX_DEFAULT="some other entries"
到
GRUB_CMDLINE_LINUX_DEFAULT="some other entries profile"
不要更改任何其他条目。保存文件并运行
sudo update-grub
通知 GRUB 配置已更改。然后重新启动。此次重启将慢点比平常，因为 GRUB 现在正在创建配置文件。
系统启动后，再次编辑上述文件并消除输入profile后，保存并运行update-grub，否则你的所有启动都会变慢。
将来您的系统应该会启动得更快。我读到过最多可缩短 10 秒的记录，但实际结果可能会有所不同，而且您的硬件不太可能实现这种极端结果。
如果您想进一步提高速度，您应该升级 RAM 和/或购买更快的 HDD 或 SSD 来安装操作系统。
顺便说一句：预加载守护程序根本不会影响您的启动时间。