我今天安装了 Ubuntu 17.04，连接速度非常慢。最大速度为 60kbps。我研究了几个小时，但没有结果。一旦恢复正常，它又坏了。我试过了所有方法，关闭 ipv6、更改 DNS、关闭省电……请帮帮我，互联网对我来说非常重要，而且没有其他连接。我的电脑：
系统配置
enp0s25 no wireless extensions.
lo no wireless extensions.
wlp3s0 IEEE 802.11 ESSID:"KYKWIFI"
Mode:Managed Frequency:5.32 GHz Access Point: 4C:FA:CA:71:75:50
Bit Rate=54 Mb/s Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=60/70 Signal level=-50 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:1 Missed beacon:0
须藤lshw
*-network
description: Wireless interface
product: Centrino Advanced-N 6205 [Taylor Peak]
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 34
serial: 6c:88:14:33:39:1c
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.10.0-38-generic firmware=18.168.6.1 ip=10.57.36.67 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:30 memory:f1c00000-f1c01fff
iw wlp3s0 链接
Connected to 4c:fa:ca:71:75:50 (on wlp3s0)
SSID: KYKWIFI
freq: 5320
RX: 30435166 bytes (53652 packets)
TX: 2970888 bytes (26332 packets)
signal: -47 dBm
tx bitrate: 54.0 MBit/s
bss flags: short-slot-time
dtim period: 1
beacon int: 100
iw wlp3s0 信息
Interface wlp3s0
ifindex 3
wdev 0x1
addr 6c:88:14:33:39:1c
type managed
wiphy 0
channel 64 (5320 MHz), width: 20 MHz (no HT), center1: 5320 MHz
txpower 15.00 dBm
我正在使用宿舍互联网，连接后网页打开，然后使用密码登录。