内核从 4.4.0.31 更新到 >4.4.0.64 似乎导致我的 wifi 连接速度从 25Mbps 降至 <3-8Mbps。如果我使用较旧的内核 -.31 启动，我的速度就会恢复正常。这会影响其他人吗？我真的不知道如何调查这个问题。
以下是有关我的无线信息的大量信息：
########## wireless info START ##########
Report from: 24 Feb 2017 16:17 CST -0600
Booted last: 24 Feb 2017 00:00 CST -0600
Script from: 08 Jul 2016 02:16 UTC +0000
##### release ###########################
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial
##### kernel ############################
Linux 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20 11:50:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Parameters: ro, quiet, splash, vt.handoff=7
##### desktop ###########################
Ubuntu
##### lspci #############################
01:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095a] (rev 59)
Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5410]
Kernel driver in use: iwlwifi
##### lsusb #############################
Bus 001 Device 002: ID 8087:8001 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 005: ID 04f3:21d0 Elan Microelectronics Corp.
Bus 002 Device 004: ID 8087:0a2a Intel Corp.
Bus 002 Device 003: ID 0c45:64cb Microdia
Bus 002 Device 002: ID 0483:91d1 STMicroelectronics Sensor Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
##### PCMCIA card info ##################
##### rfkill ############################
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
##### lsmod #############################
iwlmvm 311296 0
mac80211 737280 1 iwlmvm
dell_wmi 16384 0
snd_soc_rt5640 114688 0
snd_soc_rl6231 16384 1 snd_soc_rt5640
iwlwifi 200704 1 iwlmvm
snd_soc_core 212992 2 snd_soc_rt5640,snd_soc_ssm4567
cfg80211 565248 3 iwlwifi,mac80211,iwlmvm
snd_pcm 106496 7 snd_soc_rt5640,snd_soc_core,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_pcm_dmaengine,snd_hda_core
sparse_keymap 16384 2 dell_wmi,intel_vbtn
wmi 20480 2 dell_led,dell_wmi
video 40960 2 i915,dell_wmi
##### interfaces ########################
auto lo
iface lo inet loopback
##### ifconfig ##########################
wlp1s0 Link encap:Ethernet HWaddr <MAC 'wlp1s0' [IF1]>
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::b211:6513:5a1d:4151/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3850 errors:0 dropped:0 overruns:0 frame:0
TX packets:2298 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:4384052 (4.3 MB) TX bytes:1432444 (1.4 MB)
##### iwconfig ##########################
lo no wireless extensions.
wlp1s0 IEEE 802.11abgn ESSID:"DFNET2"
Mode:Managed Frequency:2.462 GHz Access Point: ############
Bit Rate=54 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=59/70 Signal level=-51 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:64 Missed beacon:0
##### route #############################
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.1.1 0.0.0.0 UG 600 0 0 wlp1s0
192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlp1s0
##### resolv.conf #######################
nameserver 127.0.1.1
##### network managers ##################
Installed:
NetworkManager
Running:
root 2790 1 0 16:15 ? 00:00:00 /usr/sbin/NetworkManager --no-daemon
##### NetworkManager info ###############
GENERAL.DEVICE: wlp1s0
GENERAL.TYPE: wifi
GENERAL.NM-TYPE: NMDeviceWifi
GENERAL.VENDOR: Intel Corporation
GENERAL.PRODUCT: Wireless 7265 (Dual Band Wireless-AC 7265)
GENERAL.DRIVER: iwlwifi
GENERAL.DRIVER-VERSION: 4.4.0-64-generic
GENERAL.FIRMWARE-VERSION: 16.242414.0
GENERAL.HWADDR: <MAC 'wlp1s0' [IF1]>
GENERAL.MTU: 0
GENERAL.STATE: 100 (connected)
GENERAL.REASON: 0 (No reason given)
GENERAL.UDI: /sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/net/wlp1s0
GENERAL.IP-IFACE: wlp1s0
GENERAL.IS-SOFTWARE: no
GENERAL.NM-MANAGED: yes
GENERAL.AUTOCONNECT: yes
GENERAL.FIRMWARE-MISSING: no
GENERAL.NM-PLUGIN-MISSING: no
GENERAL.PHYS-PORT-ID: --
GENERAL.CONNECTION: ###### 1
GENERAL.CON-UUID: 048840aa-52c9-4436-ad28-e11fda56893c
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/0
GENERAL.METERED: no (guessed)
CAPABILITIES.CARRIER-DETECT: no
CAPABILITIES.SPEED: 54 Mb/s
CAPABILITIES.IS-SOFTWARE: no
WIFI-PROPERTIES.WEP: yes
WIFI-PROPERTIES.WPA: yes
WIFI-PROPERTIES.WPA2: yes
WIFI-PROPERTIES.TKIP: yes
WIFI-PROPERTIES.CCMP: yes
WIFI-PROPERTIES.AP: yes
WIFI-PROPERTIES.ADHOC: yes
WIFI-PROPERTIES.2GHZ: yes
WIFI-PROPERTIES.5GHZ: yes
CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{1}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]: 048840aa-52c9-4436-ad28-e11fda56893c | DFNET2 1
IP4.ADDRESS[1]: 192.168.1.3/24
IP4.GATEWAY: 192.168.1.1
IP4.DNS[1]: 192.168.1.1
DHCP4.OPTION[1]: requested_routers = 1
DHCP4.OPTION[2]: requested_domain_search = 1
DHCP4.OPTION[3]: requested_time_offset = 1
DHCP4.OPTION[4]: requested_domain_name = 1
DHCP4.OPTION[5]: requested_rfc3442_classless_static_routes = 1
DHCP4.OPTION[6]: requested_broadcast_address = 1
DHCP4.OPTION[7]: requested_netbios_scope = 1
DHCP4.OPTION[8]: requested_wpad = 1
DHCP4.OPTION[9]: next_server = 0.0.0.0
DHCP4.OPTION[10]: expiry = 1488060943
DHCP4.OPTION[11]: requested_interface_mtu = 1
DHCP4.OPTION[12]: requested_subnet_mask = 1
DHCP4.OPTION[13]: dhcp_lease_time = 86400
DHCP4.OPTION[14]: dhcp_message_type = 5
DHCP4.OPTION[15]: ip_address = 192.168.1.3
DHCP4.OPTION[16]: requested_static_routes = 1
DHCP4.OPTION[17]: requested_domain_name_servers = 1
DHCP4.OPTION[18]: routers = 192.168.1.1
DHCP4.OPTION[19]: broadcast_address = 192.168.1.255
DHCP4.OPTION[20]: requested_ntp_servers = 1
DHCP4.OPTION[21]: requested_netbios_name_servers = 1
DHCP4.OPTION[22]: domain_name_servers = 192.168.1.1
DHCP4.OPTION[23]: requested_ms_classless_static_routes = 1
DHCP4.OPTION[24]: subnet_mask = 255.255.255.0
DHCP4.OPTION[25]: network_number = 192.168.1.0
DHCP4.OPTION[26]: requested_host_name = 1
DHCP4.OPTION[27]: dhcp_server_identifier = 192.168.1.1
IP6.ADDRESS[1]: fe80::b211:6513:5a1d:4151/64
IP6.GATEWAY:
SSID BSSID MODE CHAN FREQ RATE SIGNAL BARS SECURITY ACTIVE *
-- <MAC '--' [AN1]> Infra 153 5765 MHz 54 Mbit/s 85 ▂▄▆█ WPA2 no
DFNET2 <MAC 'DFNET2' [AN2]> Infra 11 2462 MHz 54 Mbit/s 75 ▂▄▆_ WPA2 yes *
ATT2R7K7a2 <MAC 'ATT2R7K7a2' [AN3]> Infra 1 2412 MHz 54 Mbit/s 37 ▂▄__ WPA1 WPA2 no
-- <MAC '--' [AN4]> Infra 40 5200 MHz 0 Mbit/s 37 ▂▄__ WEP no
NETGEAR79 <MAC 'NETGEAR79' [AN5]> Infra 1 2412 MHz 54 Mbit/s 34 ▂▄__ WPA2 no
MyCharterWiFia4-2G <MAC 'MyCharterWiFia4-2G' [AN6]> Infra 6 2437 MHz 54 Mbit/s 34 ▂▄__ WPA2 no
-- <MAC '--' [AN7]> Infra 1 2412 MHz 54 Mbit/s 32 ▂▄__ WEP no
-- <MAC '--' [AN8]> Infra 1 2412 MHz 54 Mbit/s 30 ▂___ WPA2 no
-- <MAC '--' [AN9]> Infra 1 2412 MHz 54 Mbit/s 22 ▂___ WPA2 no
Flowers <MAC 'Flowers' [AN10]> Infra 6 2437 MHz 54 Mbit/s 19 ▂___ WPA2 no
Flowers <MAC 'Flowers' [AN11]> Infra 6 2437 MHz 54 Mbit/s 15 ▂___ WPA2 no
-- <MAC '--' [AN12]> Infra 6 2437 MHz 54 Mbit/s 14 ▂___ WEP no
GETCHO OWN DAMN WIFI <MAC 'GETCHO OWN DAMN WIFI' [AN13]> Infra 7 2442 MHz 54 Mbit/s 14 ▂___ WPA2 no
The Vue Lofts WiFi <MAC 'The Vue Lofts WiFi' [AN14]> Infra 11 2462 MHz 54 Mbit/s 9 ▂___ -- no
##### NetworkManager.state ##############
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
##### NetworkManager.conf ###############
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=false
##### NetworkManager profiles ###########
[[/etc/NetworkManager/system-connections/DFNET2 1]] (600 root)
[connection] id=DFNET2 1 | type=wifi | permissions=user:def:;
[wifi] mac-address=<MAC 'wlp1s0' [IF1]> | mac-address-blacklist= | ssid=DFNET2
[ipv4] method=auto
[ipv6] method=auto
[[/etc/NetworkManager/system-connections/DFNET2]] (600 root)
[connection] id=DFNET2 | type=wifi | permissions=user:ubuntu:;
[wifi] mac-address=<MAC 'wlp1s0' [IF1]> | mac-address-blacklist= | ssid=DFNET2
[ipv4] method=auto
[ipv6] method=auto
##### iw reg get ########################
Region: America/Chicago (based on set time zone)
country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 40), (N/A, 20), (N/A), NO-IR
(2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, NO-IR
(5170 - 5250 @ 80), (N/A, 20), (N/A), NO-IR
(5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, NO-IR
(5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, NO-IR
(5735 - 5835 @ 80), (N/A, 20), (N/A), NO-IR
(57240 - 63720 @ 2160), (N/A, 0), (N/A)
##### iwlist channels ###################
lo no frequency information.
wlp1s0 32 channels in total; available frequencies :
Channel 01 : 2.412 GHz
Channel 02 : 2.417 GHz
Channel 03 : 2.422 GHz
Channel 04 : 2.427 GHz
Channel 05 : 2.432 GHz
Channel 06 : 2.437 GHz
Channel 07 : 2.442 GHz
Channel 08 : 2.447 GHz
Channel 09 : 2.452 GHz
Channel 10 : 2.457 GHz
Channel 11 : 2.462 GHz
Channel 12 : 2.467 GHz
Channel 13 : 2.472 GHz
Channel 36 : 5.18 GHz
Channel 40 : 5.2 GHz
Channel 44 : 5.22 GHz
Channel 48 : 5.24 GHz
Channel 52 : 5.26 GHz
Channel 56 : 5.28 GHz
Channel 60 : 5.3 GHz
Channel 64 : 5.32 GHz
Channel 100 : 5.5 GHz
Channel 104 : 5.52 GHz
Channel 108 : 5.54 GHz
Channel 112 : 5.56 GHz
Channel 116 : 5.58 GHz
Channel 120 : 5.6 GHz
Channel 124 : 5.62 GHz
Channel 128 : 5.64 GHz
Channel 132 : 5.66 GHz
Channel 136 : 5.68 GHz
Channel 140 : 5.7 GHz
Current Frequency:2.462 GHz (Channel 11)
##### iwlist scan #######################
lo Interface doesn't support scanning.
wlp1s0 Interface doesn't support scanning : Device or resource busy
##### module infos ######################
[iwlmvm]
filename: /lib/modules/4.4.0-64-generic/kernel/drivers/net/wireless/iwlwifi/mvm/iwlmvm.ko
license: GPL
author: Copyright(c) 2003- 2015 Intel Corporation <[email protected]>
description: The new Intel(R) wireless AGN driver for Linux
srcversion: 60ED6558F1225672289299A
depends: iwlwifi,mac80211,cfg80211
intree: Y
vermagic: 4.4.0-64-generic SMP mod_unload modversions
parm: init_dbg:set to true to debug an ASSERT in INIT fw (default: false (bool)
parm: power_scheme:power management scheme: 1-active, 2-balanced, 3-low power, default: 2 (int)
parm: tfd_q_hang_detect:TFD queues hang detection (default: true (bool)
[mac80211]
filename: /lib/modules/4.4.0-64-generic/kernel/net/mac80211/mac80211.ko
license: GPL
description: IEEE 802.11 subsystem
srcversion: 59E6C095E163EDB3ECF327B
depends: cfg80211
intree: Y
vermagic: 4.4.0-64-generic SMP mod_unload modversions
parm: minstrel_vht_only:Use only VHT rates when VHT is supported by sta. (bool)
parm: max_nullfunc_tries:Maximum nullfunc tx tries before disconnecting (reason 4). (int)
parm: max_probe_tries:Maximum probe tries before disconnecting (reason 4). (int)
parm: beacon_loss_count:Number of beacon intervals before we decide beacon was lost. (int)
parm: probe_wait_ms:Maximum time(ms) to wait for probe response before disconnecting (reason 4). (int)
parm: ieee80211_default_rc_algo:Default rate control algorithm for mac80211 to use (charp)
[iwlwifi]
filename: /lib/modules/4.4.0-64-generic/kernel/drivers/net/wireless/iwlwifi/iwlwifi.ko
license: GPL
author: Copyright(c) 2003- 2015 Intel Corporation <[email protected]>
description: Intel(R) Wireless WiFi driver for Linux
firmware: iwlwifi-100-5.ucode
firmware: iwlwifi-1000-5.ucode
firmware: iwlwifi-135-6.ucode
firmware: iwlwifi-105-6.ucode
firmware: iwlwifi-2030-6.ucode
firmware: iwlwifi-2000-6.ucode
firmware: iwlwifi-5150-2.ucode
firmware: iwlwifi-5000-5.ucode
firmware: iwlwifi-6000g2b-6.ucode
firmware: iwlwifi-6000g2a-5.ucode
firmware: iwlwifi-6050-5.ucode
firmware: iwlwifi-6000-4.ucode
firmware: iwlwifi-7265D-13.ucode
firmware: iwlwifi-7265-13.ucode
firmware: iwlwifi-3160-13.ucode
firmware: iwlwifi-7260-13.ucode
firmware: iwlwifi-8000-13.ucode
srcversion: 4116E844336D79483D28F6F
depends: cfg80211
intree: Y
vermagic: 4.4.0-64-generic SMP mod_unload modversions
parm: swcrypto:using crypto in software (default 0 [hardware]) (int)
parm: 11n_disable:disable 11n functionality, bitmap: 1: full, 2: disable agg TX, 4: disable agg RX, 8 enable agg TX (uint)
parm: amsdu_size_8K:enable 8K amsdu size (default 0) (int)
parm: fw_restart:restart firmware in case of error (default true) (bool)
parm: antenna_coupling:specify antenna coupling in dB (default: 0 dB) (int)
parm: nvm_file:NVM file name (charp)
parm: d0i3_disable:disable d0i3 functionality (default: Y) (bool)
parm: lar_disable:disable LAR functionality (default: N) (bool)
parm: uapsd_disable:disable U-APSD functionality (default: Y) (bool)
parm: bt_coex_active:enable wifi/bt co-exist (default: enable) (bool)
parm: led_mode:0=system default, 1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0) (int)
parm: power_save:enable WiFi power management (default: disable) (bool)
parm: power_level:default power save level (range from 1 - 5, default: 1) (int)
parm: fw_monitor:firmware monitor - to debug FW (default: false - needs lots of memory) (bool)
[cfg80211]
filename: /lib/modules/4.4.0-64-generic/kernel/net/wireless/cfg80211.ko
description: wireless configuration support
license: GPL
author: Johannes Berg
srcversion: A7DC879B6551813C20004F1
depends:
intree: Y
vermagic: 4.4.0-64-generic SMP mod_unload modversions
parm: bss_entries_limit:limit to number of scan BSS entries (per wiphy, default 1000) (int)
parm: ieee80211_regdom:IEEE 802.11 regulatory domain code (charp)
parm: cfg80211_disable_40mhz_24ghz:Disable 40MHz support in the 2.4GHz band (bool)
##### module parameters #################
[iwlmvm]
init_dbg: N
power_scheme: 2
tfd_q_hang_detect: Y
[mac80211]
beacon_loss_count: 7
ieee80211_default_rc_algo: minstrel_ht
max_nullfunc_tries: 2
max_probe_tries: 5
minstrel_vht_only: Y
probe_wait_ms: 500
[iwlwifi]
11n_disable: 0
amsdu_size_8K: 0
antenna_coupling: 0
bt_coex_active: Y
d0i3_disable: Y
fw_monitor: N
fw_restart: Y
lar_disable: N
led_mode: 0
nvm_file: (null)
power_level: 0
power_save: N
swcrypto: 0
uapsd_disable: Y
[cfg80211]
bss_entries_limit: 1000
cfg80211_disable_40mhz_24ghz: N
ieee80211_regdom: 00
##### /etc/modules ######################
##### modprobe options ##################
[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci
[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac
[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off
[/etc/modprobe.d/intel-microcode-blacklist.conf]
blacklist microcode
[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211
[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en
##### rc.local ##########################
exit 0
##### pm-utils ##########################
##### udev rules ########################
##### dmesg #############################
[ 11.004694] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-7265D-19.ucode failed with error -2
[ 11.004710] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-7265D-18.ucode failed with error -2
[ 11.004718] iwlwifi 0000:01:00.0: Direct firmware load for iwlwifi-7265D-17.ucode failed with error -2
[ 11.427883] iwlwifi 0000:01:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
[ 12.123454] iwlwifi 0000:01:00.0: Detected Intel(R) Dual Band Wireless AC 7265, REV=0x210
[ 12.123790] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled (repeated 2 times)
[ 12.606159] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 12.840888] iwlwifi 0000:01:00.0 wlp1s0: renamed from wlan0
[ 32.715784] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready
[ 32.716147] iwlwifi 0000:01:00.0: L1 Enabled - LTR Enabled (repeated 4 times)
[ 32.813403] IPv6: ADDRCONF(NETDEV_UP): wlp1s0: link is not ready (repeated 2 times)
[ 41.566470] wlp1s0: authenticate with <MAC 'DFNET2' [AN2]>
[ 41.572197] wlp1s0: send auth to <MAC 'DFNET2' [AN2]> (try 1/3)
[ 41.574144] wlp1s0: authenticated
[ 41.576690] wlp1s0: associate with <MAC 'DFNET2' [AN2]> (try 1/3)
[ 41.579891] wlp1s0: RX AssocResp from <MAC 'DFNET2' [AN2]> (capab=0x1411 status=0 aid=2)
[ 41.582121] wlp1s0: associated
[ 41.582166] IPv6: ADDRCONF(NETDEV_CHANGE): wlp1s0: link becomes ready
########## wireless info END ############