我的 Acer Aspire E5 575G 配有 Qualcomm Atheros QCA9377。我尝试过重新安装内核，重新安装驱动程序（ath10k），安装 backport，关闭省电功能，安装 wicd 等……唯一能稍微有帮助的是禁用路由器设置中的 WMM。我的内核版本是 4.10.0-42-generic。路由器旁边的典型速度是上传和下载 15 mbps。我有一个 50/50 计划。50+ mbps 是我的以太网速度。当蓝牙打开时，我的 mbps 是当前慢速 wifi 的一半。以下是你们经常要求的一些命令：
tcr-g@TCR:~/backports-20151120$ lshw -C network
WARNING: you should run this program as super-user.
*-network
description: Wireless interface
product: Qualcomm Atheros
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 31
serial: 3c:a0:67:b7:f9:b5
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath10k_pci driverversion=4.10.0-42-generic firmware=WLAN.TF.1.0-00267-1 ip=192.168.1.13 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:132 memory:b4000000-b41fffff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0.1
bus info: pci@0000:04:00.1
logical name: enp4s0f1
version: 12
serial: a8:1e:84:8c:f3:95
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8411-2_0.0.1 07/08/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:129 ioport:3000(size=256) memory:b4204000-b4204fff memory:b4200000-b4203fff
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
tcr-g@TCR:~/backports-20151120$ dmesg | grep ath
[ 2.605692] ath10k_pci 0000:03:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[ 3.753058] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/pre-cal-pci-0000:03:00.0.bin failed with error -2
[ 3.753072] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/cal-pci-0000:03:00.0.bin failed with error -2
[ 3.756304] ath10k_pci 0000:03:00.0: qca9377 hw1.1 target 0x05020001 chip_id 0x003821ff sub 11ad:08a6
[ 3.756307] ath10k_pci 0000:03:00.0: kconfig debug 0 debugfs 1 tracing 1 dfs 0 testmode 0
[ 3.756709] ath10k_pci 0000:03:00.0: firmware ver WLAN.TF.1.0-00267-1 api 5 features ignore-otp crc32 79cea2c7
[ 3.826673] ath10k_pci 0000:03:00.0: board_file api 2 bmi_id N/A crc32 93da0176
[ 5.624886] ath10k_pci 0000:03:00.0: htt-ver 3.1 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
[ 5.631635] ath: EEPROM regdomain: 0x69
[ 5.631636] ath: EEPROM indicates we should expect a direct regpair map
[ 5.631637] ath: Country alpha2 being used: 00
[ 5.631638] ath: Regpair used: 0x69
[ 5.635286] ath10k_pci 0000:03:00.0 wlp3s0: renamed from wlan0
[ 8.219280] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[ 17.699227] ath10k_pci 0000:03:00.0 wlp3s0: disabling HT as WMM/QoS is not supported by the AP
[ 17.699229] ath10k_pci 0000:03:00.0 wlp3s0: disabling VHT as WMM/QoS is not supported by the AP
[ 17.706891] ath: EEPROM regdomain: 0x8348
[ 17.706892] ath: EEPROM indicates we should expect a country code
[ 17.706892] ath: doing EEPROM country->regdmn map search
[ 17.706893] ath: country maps to regdmn code: 0x3a
[ 17.706893] ath: Country alpha2 being used: US
[ 17.706894] ath: Regpair used: 0x3a
[ 17.706894] ath: regdomain 0x8348 dynamically updated by country IE
[21149.836191] ath10k_pci 0000:03:00.0: failed to install key for vdev 0 peer 00:7f:28:79:03:4e: -110
[21176.174975] ath10k_pci 0000:03:00.0 wlp3s0: disabling HT as WMM/QoS is not supported by the AP
[21176.174976] ath10k_pci 0000:03:00.0 wlp3s0: disabling VHT as WMM/QoS is not supported by the AP
[21176.187707] ath: EEPROM regdomain: 0x8348
[21176.187708] ath: EEPROM indicates we should expect a country code
[21176.187709] ath: doing EEPROM country->regdmn map search
[21176.187710] ath: country maps to regdmn code: 0x3a
[21176.187711] ath: Country alpha2 being used: US
[21176.187711] ath: Regpair used: 0x3a
[21176.187712] ath: regdomain 0x8348 dynamically updated by country IE
[22095.165638] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22095.267894] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22095.370380] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22095.472716] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22095.575322] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22095.677724] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22095.780064] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22095.882586] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22095.984765] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22096.087341] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[22106.315653] ath10k_warn: 10 callbacks suppressed
[22106.315691] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[24125.507965] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[25301.490471] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[25964.493815] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[28246.217197] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[28573.272844] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[28575.380226] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[28887.948033] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[30208.862759] __mutex_lock_slowpath+0x193/0x290
[30208.862822] path_openat+0x2ac/0x1430
[30208.862883] entry_SYSCALL_64_fastpath+0x1e/0xad
[30564.955587] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[30565.470017] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[30899.273952] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[30899.274179] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[30903.578321] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[31557.410765] ath10k_pci 0000:03:00.0: no channel configured; ignoring frame(s)!
[34913.254867] ath10k_pci 0000:03:00.0 wlp3s0: disabling HT as WMM/QoS is not supported by the AP
[34913.254871] ath10k_pci 0000:03:00.0 wlp3s0: disabling VHT as WMM/QoS is not supported by the AP
[34913.270099] ath: EEPROM regdomain: 0x8348
[34913.270100] ath: EEPROM indicates we should expect a country code
[34913.270101] ath: doing EEPROM country->regdmn map search
[34913.270102] ath: country maps to regdmn code: 0x3a
[34913.270103] ath: Country alpha2 being used: US
[34913.270103] ath: Regpair used: 0x3a
[34913.270105] ath: regdomain 0x8348 dynamically updated by country IE
[35173.320845] ath10k_pci 0000:03:00.0 wlp3s0: disabling HT as WMM/QoS is not supported by the AP
[35173.320849] ath10k_pci 0000:03:00.0 wlp3s0: disabling VHT as WMM/QoS is not supported by the AP
[35173.336678] ath: EEPROM regdomain: 0x8348
[35173.336678] ath: EEPROM indicates we should expect a country code
[35173.336679] ath: doing EEPROM country->regdmn map search
[35173.336680] ath: country maps to regdmn code: 0x3a
[35173.336681] ath: Country alpha2 being used: US
[35173.336682] ath: Regpair used: 0x3a
[35173.336683] ath: regdomain 0x8348 dynamically updated by country IE
[39817.251694] ath10k_pci 0000:03:00.0: failed to install key for vdev 0 peer 00:7f:28:79:03:4e: -110
[39817.375135] ath10k_pci 0000:03:00.0 wlp3s0: disabling HT as WMM/QoS is not supported by the AP
[39817.375138] ath10k_pci 0000:03:00.0 wlp3s0: disabling VHT as WMM/QoS is not supported by the AP
[39817.384885] ath: EEPROM regdomain: 0x8348
[39817.384886] ath: EEPROM indicates we should expect a country code
[39817.384887] ath: doing EEPROM country->regdmn map search
[39817.384888] ath: country maps to regdmn code: 0x3a
[39817.384889] ath: Country alpha2 being used: US
[39817.384890] ath: Regpair used: 0x3a
[39817.384891] ath: regdomain 0x8348 dynamically updated by country IE
tcr-g@TCR:~/backports-20151120$ sudo iw reg get
[sudo] password for tcr-g:
country US: DFS-FCC
(2402 - 2472 @ 40), (N/A, 30), (N/A)
(5170 - 5250 @ 80), (N/A, 17), (N/A)
(5250 - 5330 @ 80), (N/A, 23), (0 ms), DFS
(5490 - 5730 @ 160), (N/A, 23), (0 ms), DFS
(5735 - 5835 @ 80), (N/A, 30), (N/A)
(57240 - 63720 @ 2160), (N/A, 40), (N/A)
tcr-g@TCR:~/backports-20151120$
tcr-g@TCR:~/backports-20151120$ modinfo ath10k_pci; dkms status
filename: /lib/modules/4.10.0-42-generic/kernel/drivers/net/wireless/ath/ath10k/ath10k_pci.ko
firmware: ath10k/QCA9377/hw1.0/board.bin
firmware: ath10k/QCA9377/hw1.0/firmware-5.bin
firmware: ath10k/QCA6174/hw3.0/board-2.bin
firmware: ath10k/QCA6174/hw3.0/board.bin
firmware: ath10k/QCA6174/hw3.0/firmware-5.bin
firmware: ath10k/QCA6174/hw3.0/firmware-4.bin
firmware: ath10k/QCA6174/hw2.1/board-2.bin
firmware: ath10k/QCA6174/hw2.1/board.bin
firmware: ath10k/QCA6174/hw2.1/firmware-5.bin
firmware: ath10k/QCA6174/hw2.1/firmware-4.bin
firmware: ath10k/QCA9887/hw1.0/board-2.bin
firmware: ath10k/QCA9887/hw1.0/board.bin
firmware: ath10k/QCA9887/hw1.0/firmware-5.bin
firmware: ath10k/QCA988X/hw2.0/board-2.bin
firmware: ath10k/QCA988X/hw2.0/board.bin
firmware: ath10k/QCA988X/hw2.0/firmware-5.bin
firmware: ath10k/QCA988X/hw2.0/firmware-4.bin
firmware: ath10k/QCA988X/hw2.0/firmware-3.bin
firmware: ath10k/QCA988X/hw2.0/firmware-2.bin
license: Dual BSD/GPL
description: Driver support for Qualcomm Atheros 802.11ac WLAN PCIe/AHB devices
author: Qualcomm Atheros
srcversion: 55269025DC0881FB8B580CD
alias: pci:v0000168Cd00000050sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000042sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000046sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000056sv*sd*bc*sc*i*
alias: pci:v0000168Cd00000040sv*sd*bc*sc*i*
alias: pci:v0000168Cd0000003Esv*sd*bc*sc*i*
alias: pci:v0000168Cd00000041sv*sd*bc*sc*i*
alias: pci:v0000168Cd0000003Csv*sd*bc*sc*i*
depends: ath10k_core
intree: Y
vermagic: 4.10.0-42-generic SMP mod_unload
parm: irq_mode:0: auto, 1: legacy, 2: msi (default: 0) (uint)
parm: reset_mode:0: auto, 1: warm only (default: 0) (uint)
bbswitch, 0.8, 4.10.0-42-generic, x86_64: installed
bbswitch, 0.8, 4.10.0-43-generic, x86_64: installed
bbswitch, 0.8, 4.4.0-105-generic, x86_64: installed
nvidia-384, 384.90, 4.10.0-42-generic, x86_64: installed
nvidia-384, 384.90, 4.10.0-43-generic, x86_64: installed
nvidia-384, 384.90, 4.4.0-105-generic, x86_64: installed
tcr-g@TCR:~/backports-20151120$ sudo iwlist scan
[sudo] password for tcr-g:
vmnet1 Interface doesn't support scanning.
enp4s0f1 Interface doesn't support scanning.
vmnet8 Interface doesn't support scanning.
lo Interface doesn't support scanning.
wlp3s0 Scan completed :
Cell 01 - Address: XX:XX:XX:XX:XX:XX
Channel:8
Frequency:2.447 GHz (Channel 8)
Quality=57/70 Signal level=-53 dBm
Encryption key:on
ESSID:"delbhome"
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 18 Mb/s
Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
Mode:Master
Extra:tsf=00000001bdbf8475
Extra: Last beacon: 48ms ago
IE: Unknown: 000864656C62686F6D65
IE: Unknown: 010882848B960C121824
IE: Unknown: 030108
IE: Unknown: 200100
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: WPA Version 1
Group Cipher : CCMP
Pairwise Ciphers (1) : CCMP
Authentication Suites (1) : PSK
IE: Unknown: 2A0100
IE: Unknown: 32043048606C
IE: Unknown: 2D1A8C131B0000000000000000000000000000000000000000000000
IE: Unknown: 3D1608001B00000000000000000000000000000000000000
IE: Unknown: DD0900037F01010000FF7F
IE: Unknown: DD0A00037F04010000000000
IE: Unknown: 0706555320010B1B
tcr-g@TCR:~$ tracepath mtu
1?: [LOCALHOST] pmtu 1500
1: Wireless_Broadband_Router.home 1.350ms
1: Wireless_Broadband_Router.home 1.247ms
2: 47.187.192.1 10.938ms
3: 172.102.52.82 16.723ms
4: ae7---0.scr01.dlls.tx.frontiernet.net 14.487ms
5: ae1---0.cbr01.dlls.tx.frontiernet.net 12.700ms
6: no reply
7: no reply
8: 10ge3-15.core1.dal1.he.net 24.767ms
9: 100ge4-2.core1.phx2.he.net 49.334ms asymm 11
10: 100ge11-2.core1.lax2.he.net 64.731ms
11: xerocole-inc.gigabitethernet2-9.core1.lax2.he.net 40.325ms
12: no reply
13: no reply
14: no reply
15: no reply
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22: no reply
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29: no reply
30: no reply
Too many hops: pmtu 1500
Resume: pmtu 1500
tcr-g@TCR:~$
感谢您的帮助！
答案1
降低 MTU 值。MTU 为 1500 时，Wifi 会严重滞后。
wlp1s0 Link encap:Ethernet HWaddr a8:6b:ad:0d:b7:bf
inet addr:192.168.*.* Bcast:192.168.*.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:300 Metric:1
RX packets:138453 errors:0 dropped:0 overruns:0 frame:0
TX packets:45222 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:61733823 (61.7 MB) TX bytes:9958448 (9.9 MB)