Mint lenteur au démarrage

Bonjour,

J'étais en dual boot avec win7 et mint 17 et j'ai voulu supprimer windows pour ne garder que linux et en même temps passer à mint 18.
Sauf que depuis j'ai un problème de lenteur au démarrage, voici ce que j'obtiens en faisant une analyse :
Startup finished in 29.519s (firmware) + 3.892s (loader) + 3.587s (kernel) + 38.952s (userspace) = 1min 15.953s

SI je regarde dans le détail, j'observe que c'est 36.869s upower.service qui met énormément de temps à se charger

Et en faisant un coup dmesg, je vois des erreurs mais ça dépasse mes compétences, quelqu'un saurait-il m'aider ?

[    4.016908] Adding 8324092k swap on /dev/sda3.  Priority:-1 extents:1 across:8324092k SSFS
[    4.056201] nvidia: module license 'NVIDIA' taints kernel.
[    4.056203] Disabling lock debugging due to kernel taint
[    4.079451] nvidia: module verification failed: signature and/or required key missing - tainting kernel
[    4.082751] vgaarb: device changed decodes: PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=io+mem
[    4.082811] nvidia-nvlink: Nvlink Core is being initialized, major device number 245
[    4.082822] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  370.23  Mon Aug  8 18:02:36 PDT 2016
[    4.085336] intel_rapl: Found RAPL domain package
[    4.085338] intel_rapl: Found RAPL domain core
[    4.085340] intel_rapl: Found RAPL domain dram
[    4.085919] asus_wmi: ASUS WMI generic driver loaded
[    4.086760] asus_wmi: Initialization: 0x0
[    4.086772] asus_wmi: BIOS WMI version: 0.9
[    4.086792] asus_wmi: SFUN value: 0x0
[    4.086962] input: Eee PC WMI hotkeys as /devices/platform/eeepc-wmi/input/input13
[    4.087025] asus_wmi: Number of fans: 1
[    4.091646] [drm] Initialized drm 1.1.0 20060810
[    4.119230] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms  370.23  Mon Aug  8 17:29:28 PDT 2016
[    4.119814] [drm] [nvidia-drm] [GPU ID 0x00000100] Loading driver
[    4.149145] nvidia-uvm: Loaded the UVM driver in 8 mode, major device number 244
[    4.450266] input: HDA NVidia HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input14
[    4.450297] input: HDA NVidia HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input15
[    4.450323] input: HDA NVidia HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input16
[    4.450350] input: HDA NVidia HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input17
[    4.814788] NVRM: Your system is not currently configured to drive a VGA console
[    4.814790] NVRM: on the primary VGA device. The NVIDIA Linux graphics driver
[    4.814791] NVRM: requires the use of a text-mode VGA console. Use of other console
[    4.814792] NVRM: drivers including, but not limited to, vesafb, may result in
[    4.814792] NVRM: corruption and stability problems, and is not supported.
[    4.937741] cgroup: new mount options do not match the existing superblock, will be ignored
[    5.068163] IPv6: ADDRCONF(NETDEV_UP): eno1: link is not ready
[    5.173479] nvidia-modeset: Allocated GPU:0 (GPU-6a2dd4a7-564d-3e0c-e6f8-fe5d7a2fdce2) @ PCI:0000:01:00.0
[    5.273748] IPv6: ADDRCONF(NETDEV_UP): eno1: link is not ready
[    5.309623] snd_hda_codec_hdmi hdaudioC1D0: HDMI: invalid ELD data byte 1
[    8.067365] e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
[    8.067393] IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready
[   11.077651] usb 3-3: device descriptor read/all, error -110
[   11.201393] usb 4-3: new SuperSpeed USB device number 2 using xhci_hcd
[   11.355170] usb 4-3: New USB device found, idVendor=174c, idProduct=3074
[   11.355172] usb 4-3: New USB device strings: Mfr=2, Product=3, SerialNumber=0
[   11.355173] usb 4-3: Product: ASM107x
[   11.355174] usb 4-3: Manufacturer: ASUS Tek.
[   11.414823] hub 4-3:1.0: USB hub found
[   11.425561] usb 3-3: new high-speed USB device number 3 using xhci_hcd
[   11.426712] hub 4-3:1.0: 4 ports detected
[   21.553764] usb 3-3: device descriptor read/all, error -110
[   21.665677] usb 3-3: new high-speed USB device number 4 using xhci_hcd
[   26.681768] usb 3-3: device descriptor read/8, error -110
[   31.801659] usb 3-3: device descriptor read/8, error -110
[   32.017616] usb 3-3: new high-speed USB device number 5 using xhci_hcd
[   37.033558] usb 3-3: device descriptor read/8, error -110
[   42.157595] usb 3-3: device descriptor read/8, error -110
[   42.261517] usb usb3-port3: unable to enumerate USB device
[   42.373504] usb 3-10: new full-speed USB device number 6 using xhci_hcd
[   42.503932] usb 3-10: New USB device found, idVendor=046d, idProduct=c52b
[   42.503944] usb 3-10: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   42.503945] usb 3-10: Product: USB Receiver
[   42.503946] usb 3-10: Manufacturer: Logitech
[   42.669500] usb 3-13: new high-speed USB device number 7 using xhci_hcd
[   42.798876] usb 3-13: New USB device found, idVendor=8564, idProduct=1000
[   42.798888] usb 3-13: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   42.798889] usb 3-13: Product: Mass Storage Device
[   42.798890] usb 3-13: Manufacturer: JetFlash
[   42.798891] usb 3-13: SerialNumber: 05HPM1CSKYE2NNYH
[   42.799030] usb 3-13: ep 0x81 - rounding interval to 128 microframes, ep desc says 255 microframes
[   42.799034] usb 3-13: ep 0x2 - rounding interval to 128 microframes, ep desc says 255 microframes
[   42.819372] hidraw: raw HID events driver (C) Jiri Kosina
[   42.826005] usb-storage 3-13:1.0: USB Mass Storage device detected
[   42.826281] scsi host8: usb-storage 3-13:1.0
[   42.826353] usbcore: registered new interface driver usb-storage
[   42.827525] usbcore: registered new interface driver uas
[   42.828374] usbcore: registered new interface driver usbhid
[   42.828375] usbhid: USB HID core driver
[   42.832843] logitech-djreceiver 0003:046D:C52B.0003: hiddev0,hidraw0: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:14.0-10/input2
[   42.955919] input: Logitech Performance MX as /devices/pci0000:00/0000:00:14.0/usb3/3-10/3-10:1.2/0003:046D:C52B.0003/0003:046D:101A.0004/input/input18
[   42.956182] logitech-hidpp-device 0003:046D:101A.0004: input,hidraw1: USB HID v1.11 Mouse [Logitech Performance MX] on usb-0000:00:14.0-10:1
[   42.959956] input: Logitech K800 as /devices/pci0000:00/0000:00:14.0/usb3/3-10/3-10:1.2/0003:046D:C52B.0003/0003:046D:2010.0005/input/input19
[   42.961708] logitech-hidpp-device 0003:046D:2010.0005: input,hidraw2: USB HID v1.11 Keyboard [Logitech K800] on usb-0000:00:14.0-10:2
[   44.462569] scsi 8:0:0:0: Direct-Access     JetFlash Transcend 32GB   1100 PQ: 0 ANSI: 4
[   44.462873] sd 8:0:0:0: Attached scsi generic sg4 type 0
[   44.463053] sd 8:0:0:0: [sdd] 63406080 512-byte logical blocks: (32.5 GB/30.2 GiB)
[   44.463430] sd 8:0:0:0: [sdd] Write Protect is off
[   44.463432] sd 8:0:0:0: [sdd] Mode Sense: 43 00 00 00
[   44.463842] sd 8:0:0:0: [sdd] No Caching mode page found
[   44.463844] sd 8:0:0:0: [sdd] Assuming drive cache: write through
[   44.466106]  sdd: sdd1
[   44.468138] sd 8:0:0:0: [sdd] Attached SCSI removable disk
[   44.633146] FAT-fs (sdd1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[   50.874702] EXT4-fs (sdc1): mounted filesystem with ordered data mode. Opts: (null)