seems like a very, common & frustrating topic... but my wifi is at a super slow crawl. I am getting speeds slower than dial-up modems, which gets maddening when you are trying develop a website.
TEMPORARY SOLUTION
After trying -EVERY- solution below, nothing worked. So I used Timeshift and rolled back my machine to Oct. 22nd, then I did NOT do any updates or upgrades.. and now wifi seems to be working pretty well. So I plan to ignore updates & upgrades for the next month and see if the problem gets corrected elsewhere. It was definitely a recent update that caused this problem.
This is my hardware:
$sudo lshw -class network -short && nmcli device status
H/W path Device Class Description
===============================================================
/0/100/14.3 wlp0s20f3 network Killer Wi-Fi 6 AX1650i 160MHz Wireless Network Adapter
My current kernel is:
5.11.0-38-generic
More Details
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
I have tried -all- of the solutions found here:
Ubuntu 20.04 Network Performance Extremely Slow
and nothing has worked.
Does anybody have any new tricks, that I can try? even 1MB download would be a blessing from the heavens.
Additional Requested Info
Machine Brand/Model:
Acer Aspire 5 A515-55G
Command 1:
$ sudo lshw -class network
[sudo] password for dragonpharaoh:
*-network
description: Wireless interface
product: Killer Wi-Fi 6 AX1650i 160MHz Wireless Network Adapter (201NGW)
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
logical name: wlp0s20f3
version: 30
serial: 34:cf:f6:61:c0:38
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.11.0-38-generic firmware=59.601f3a66.0 Qu-c0-hr-b0-59.uc ip=192.168.0.20 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: iomemory:600-5ff irq:16 memory:6013104000-6013107fff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: enp3s0
version: 15
serial: b4:a9:fc:b0:b0:d1
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=5.11.0-38-generic firmware=rtl8168h-2_0.0.2 02/26/15 latency=0 link=no multicast=yes port=twisted pair
resources: irq:16 ioport:4000(size=256) memory:51104000-51104fff memory:51100000-51103fff
Command 2:
$ ls -al /etc/pm/config.d/
ls: cannot access '/etc/pm/config.d/': No such file or directory
Command 3:
$ ls -al /etc/modprobe.d/
total 64
drwxr-xr-x 2 root root 4096 Sep 20 17:55 .
drwxr-xr-x 177 root root 12288 Oct 29 2021 ..
-rw-r--r-- 1 root root 2507 Jul 31 2015 alsa-base.conf
-rw-r--r-- 1 root root 154 Feb 16 2020 amd64-microcode-blacklist.conf
-rw-r--r-- 1 root root 325 Mar 12 2020 blacklist-ath_pci.conf
-rw-r--r-- 1 root root 1518 Mar 12 2020 blacklist.conf
-rw-r--r-- 1 root root 210 Mar 12 2020 blacklist-firewire.conf
-rw-r--r-- 1 root root 677 Mar 12 2020 blacklist-framebuffer.conf
-rw-r--r-- 1 root root 156 Jul 31 2015 blacklist-modem.conf
lrwxrwxrwx 1 root root 41 Dec 28 2020 blacklist-oss.conf -> /lib/linux-sound-base/noOSS.modprobe.conf
-rw-r--r-- 1 root root 583 Mar 12 2020 blacklist-rare-network.conf
-rw-r--r-- 1 root root 127 Jan 22 2020 dkms.conf
-rw-r--r-- 1 root root 154 Jun 11 2020 intel-microcode-blacklist.conf
-rw-r--r-- 1 root root 347 Mar 12 2020 iwlwifi.conf
-rw-r--r-- 1 root root 95 Sep 20 17:55 v4l2loopback.conf
Command 3:
$ lspci -knn | grep Net -A2
00:14.3 Network controller [0280]: Intel Corporation Killer Wi-Fi 6 AX1650i 160MHz Wireless Network Adapter (201NGW) [8086:34f0] (rev 30)
Subsystem: Intel Corporation Killer Wi-Fi 6 AX1650i 160MHz Wireless Network Adapter (201NGW) [8086:0074]
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
Command 4:
$ modinfo iwlwifi
Too long, pastebin:
https://pastebin.com/ThKWTSyf
Command 5:
$ sudo iwlist freq
lo no frequency information.
enp3s0 no frequency information.
wlp0s20f3 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:2.412 GHz (Channel 1)
wg-client1 no frequency information.
vboxnet0 no frequency information.
Command 6:
$ sudo iwconfig
lo no wireless extensions.
enp3s0 no wireless extensions.
wlp0s20f3 IEEE 802.11 ESSID:"8D"
Mode:Managed Frequency:2.412 GHz Access Point: 1C:AB:C0:21:E1:C8
Bit Rate=144.4 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
Link Quality=70/70 Signal level=-31 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:900 Missed beacon:0
wg-client1 no wireless extensions.
vboxnet0 no wireless extensions.
Command 7:
$ inxi -Fxz
System: Kernel: 5.11.0-38-generic x86_64 bits: 64 compiler: N/A Desktop: Gnome 3.36.9
Distro: Ubuntu 20.04.3 LTS (Focal Fossa)
Machine: Type: Laptop System: Acer product: Aspire A515-55G v: V1.13 serial: <filter>
Mobo: IL model: Doc_IL v: V1.13 serial: <filter> UEFI: Insyde v: 1.13 date: 10/15/2020
Battery: ID-1: BAT1 charge: 39.5 Wh condition: 39.5/53.0 Wh (75%) model: PANASONIC AP19B5L status: Full
CPU: Topology: Quad Core model: Intel Core i5-1035G1 bits: 64 type: MT MCP arch: Ice Lake rev: 5 L2 cache: 6144 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 19046
Speed: 2256 MHz min/max: 400/3600 MHz Core speeds (MHz): 1: 2995 2: 3104 3: 3389 4: 3109 5: 2424 6: 1099 7: 3223
8: 3275
Graphics: Device-1: Intel vendor: Acer Incorporated ALI driver: i915 v: kernel bus ID: 00:02.0
Device-2: NVIDIA GP107M [GeForce MX350] vendor: Acer Incorporated ALI driver: nvidia v: 460.91.03 bus ID: 02:00.0
Display: x11 server: X.Org 1.20.11 driver: modesetting,nvidia unloaded: fbdev,nouveau,vesa
resolution: 1920x1080~60Hz
OpenGL: renderer: GeForce MX350/PCIe/SSE2 v: 4.6.0 NVIDIA 460.91.03 direct render: Yes
Audio: Device-1: Intel Smart Sound Audio vendor: Acer Incorporated ALI driver: snd_hda_intel v: kernel bus ID: 00:1f.3
Sound Server: ALSA v: k5.11.0-38-generic
Network: Device-1: Intel Killer Wi-Fi 6 AX1650i 160MHz Wireless Network Adapter driver: iwlwifi v: kernel port: 6000
bus ID: 00:14.3
IF: wlp0s20f3 state: up mac: <filter>
Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Acer Incorporated ALI driver: r8169
v: kernel port: 4000 bus ID: 03:00.0
IF: enp3s0 state: down mac: <filter>
IF-ID-1: vboxnet0 state: up speed: 10 Mbps duplex: full mac: <filter>
IF-ID-2: wg-client1 state: unknown speed: N/A duplex: N/A mac: N/A
Drives: Local Storage: total: 2.96 TiB used: 2.16 TiB (73.0%)
ID-1: /dev/nvme0n1 vendor: Kingston model: RBUSNS8154P3256GJ1 size: 238.47 GiB
ID-2: /dev/sda vendor: Seagate model: ST1000LM035-1RK172 size: 931.51 GiB temp: 41 C
ID-3: /dev/sdb type: USB vendor: Western Digital model: WD Elements 25A2 size: 1.82 TiB
Partition: ID-1: / size: 91.17 GiB used: 57.70 GiB (63.3%) fs: ext4 dev: /dev/nvme0n1p5
ID-2: /home size: 821.50 GiB used: 547.91 GiB (66.7%) fs: ext4 dev: /dev/sda2
Sensors: System Temperatures: cpu: 74.0 C mobo: N/A gpu: nvidia temp: 70 C
Fan Speeds (RPM): N/A
Info: Processes: 425 Uptime: 33m Memory: 19.33 GiB used: 9.02 GiB (46.7%) Init: systemd runlevel: 5 Compilers: gcc: 9.3.0
Shell: bash v: 5.0.17 inxi: 3.0.38
Command 8:
$ nmcli device wifi list
IN-USE BSSID SSID MODE CHAN RATE SIGNAL BARS SECURITY
* 1C:AB:C0:21:E1:C8 8D Infra 1 270 Mbit/s 100 ▂▄▆█ WPA1 WPA2
1C:AB:C0:22:3F:B8 8_A Infra 6 270 Mbit/s 67 ▂▄▆_ WPA1 WPA2
0C:9D:92:53:8F:71 CHU_ Home Infra 8 195 Mbit/s 52 ▂▄__ WPA2
1C:AB:C0:DB:BC:B8 77-7F Infra 11 130 Mbit/s 50 ▂▄__ WPA1 WPA2
F4:30:B9:E1:8D:0A DIRECT-09-HP DeskJet 5820 series Infra 11 65 Mbit/s 49 ▂▄__ WPA2
98:DA:C4:F9:E4:CE CCL Infra 3 270 Mbit/s 42 ▂▄__ WPA2
60:A4:B7:3D:37:A7 TANT Infra 4 130 Mbit/s 37 ▂▄__ WPA2
5C:92:5E:C3:E0:30 mkmkmk Infra 5 270 Mbit/s 35 ▂▄__ WPA2
74:DA:88:B2:89:B6 DiDihome Infra 2 195 Mbit/s 34 ▂▄__ WPA1 WPA2
40:9B:CD:A4:38:A0 dlink-38A0 Infra 1 130 Mbit/s 32 ▂▄__ WPA1 WPA2
FC:4A:E9:4D:BF:32 56N9F Infra 8 130 Mbit/s 32 ▂▄__ WPA2
AC:20:2E:EB:CE:58 110-8FB Infra 6 270 Mbit/s 27 ▂___ WPA1 WPA2
B8:55:10:44:FA:D4 pumpkin Infra 6 135 Mbit/s 27 ▂___ WPA2
CA:6C:87:FD:EE:54 stobene Infra 11 65 Mbit/s 27 ▂___ WPA2
C4:12:F5:40:89:A8 D-Link_DIR-612 Infra 1 270 Mbit/s 20 ▂___ WPA1 WPA2
74:DA:88:B2:89:B5 DiDihome_5G Infra 157 270 Mbit/s 17 ▂___ WPA1 WPA2
iperf test output following @matigo 's solution (post-reboot)
# iperf -s
---------------------------------------------
Server listening on TCP port 5001
TCP window size: 128 KByte (default)
---------------------------------------------
[ 4] local 173.18.61.138 port 5001 connected with 49.212.186.177 port 58582
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-14.7 sec 7.75 MBytes 4.43 Mbits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 47048
[ 4] 0.0- 5.0 sec 35.0 Bytes 56.0 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 48766 (peer 29797.29556.29797-unk)
[ 5] 0.0- 5.0 sec 4.00 Bytes 6.34 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 49782
[ 4] 0.0- 5.0 sec 35.0 Bytes 56.0 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 52368
[ 5] 0.0- 5.0 sec 4.00 Bytes 6.40 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 53856
[ 4] 0.0- 5.0 sec 35.0 Bytes 56.0 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 56368
[ 5] 0.0- 5.0 sec 243 Bytes 389 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 57994 (peer 29797.29556.29797-unk)
[ 4] 0.0- 5.1 sec 4.00 Bytes 6.33 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 60388
[ 5] 0.0- 5.0 sec 1.00 Bytes 1.60 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 33430
[ 4] 0.0- 5.0 sec 5.00 Bytes 8.00 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 35588
[ 5] 0.0- 5.0 sec 289 Bytes 463 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 36804 (peer 29797.29556.29797-unk)
[ 4] 0.0- 5.1 sec 4.00 Bytes 6.27 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 39110
[ 4] 0.0- 5.0 sec 1.00 Bytes 1.60 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 40280
[ 5] 0.0- 5.0 sec 18.0 Bytes 28.8 bits/sec
recvn abort failed: Resource temporarily unavailable
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 42074
[ 4] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec
recvn abort failed: Resource temporarily unavailable
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 42078
[ 5] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 42088 (peer 12992.43009.275-unk)
[ 4] 0.0- 5.0 sec 22.0 Bytes 34.9 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 43546
[ 5] 0.0- 4.8 sec 20.0 Bytes 33.1 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 45790 (peer 3338.3338.18245-alpha)
[ 4] 0.0- 4.6 sec 40.0 Bytes 69.0 bits/sec
connect failed: Connection refused
connect failed: Connection refused
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 47048 (peer 14901.12336.12557-unk)
[ 5] 0.0- 5.1 sec 45.0 Bytes 69.9 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 48896 (peer 3338.3338.18245-alpha)
[ 4] 0.0- 5.1 sec 40.0 Bytes 62.3 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 50210 (peer 3338.3338.18245-alpha)
[ 5] 0.0- 5.1 sec 40.0 Bytes 63.4 bits/sec
recvn abort failed: Resource temporarily unavailable
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 52430
[ 4] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 52444 (peer 116.25971.29812)
[ 5] 0.0- 5.1 sec 37.0 Bytes 57.8 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 53996
[ 4] 0.0- 5.0 sec 52.0 Bytes 83.2 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 56104 (peer 29797.29556.29797-unk)
[ 5] 0.0- 5.1 sec 4.00 Bytes 6.33 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 57490
[ 4] 0.0- 5.0 sec 50.0 Bytes 80.0 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 59838
[ 5] 0.0- 5.0 sec 210 Bytes 336 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 32774
[ 4] 0.0- 5.0 sec 18.0 Bytes 28.8 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 34698 (peer 18245.21536.12064-unk)
[ 5] 0.0- 5.1 sec 18.0 Bytes 28.5 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 35982 (peer 12081.11824.3338)
[ 4] 0.0- 5.0 sec 52.0 Bytes 82.4 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 36596
[ 5] 0.0- 5.0 sec 22.0 Bytes 34.9 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 38688
[ 4] 0.0- 5.1 sec 21.0 Bytes 33.2 bits/sec
[ 5] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 39754
[ 5] 0.0- 5.0 sec 1.00 Bytes 1.60 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 41736 (peer 29797.29556.29797-unk)
[ 4] 0.0- 5.1 sec 4.00 Bytes 6.29 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 9.132.28.227 port 42864 (peer 29556.24948.29556-unk)
[ 4] 0.0- 5.0 sec 4.00 Bytes 6.34 bits/sec
[ 4] local 173.18.61.138 port 5001 connected with 49.212.186.177 port 59900
[ 4] 0.0-12.7 sec 6.88 MBytes 4.55 Mbits/sec
Client
Client connecting to 49.212.186.177, TCP port 5001
TCP window size: 85.0 KByte (default)
---------------------------------------------
[ 3] local 10.10.10.2 port 59900 connected with 49.212.186.177 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-11.0 sec 6.88 MBytes 5.26 Mbits/sec
While the Bandwith and Transfer on the client side seem high... that is not what I am experiencing most of the time... I still luck to break 800KB transfer.
Being more clear, there are periods when wifi works as it should and I can 3, even 4 MB transfer rates..but this tansitory... it might last for 30 minutes, an hour, then instantly drop to 50KB/s at random. Also, it is always slow at boot time.
