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  1. Bug #1871408
  2. Comment #0

Comment 0 for bug 1871408

Revision history for this message
Patrick Gillespie (vermontpoet) wrote : Upgrading 18.04 to 20.04 causes Network/WIFI Throughput Slowdowns

In brief, I upgraded Kubuntu 18.04 to 20.04 Beta.

STEPS TO REPRODUCE
1. Connecting to as yet "random"(?) websites (duckduckgo, startpage, and OMGUbuntu for example) can result in extenuated wait times for page loading.
2. Attempting to updatwapt leads to failures to fetch.
3. Connecting to Speedtest.net resulted in 300 mbps upload and download whereas onnecting to https://www.speakeasy.net/speedtest/ resulted in a Connection Has Timed Out Error.

System: Host: ThinkPad Kernel: 5.4.0-21-generic x86_64 bits: 64 Desktop: KDE Plasma 5.18.3
           Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine: Type: Laptop System: LENOVO product: 20HF0012US v: ThinkPad T470s serial: <superuser/root required>
           Mobo: LENOVO model: 20HF0012US v: SDK0J40697 WIN serial: <superuser/root required> UEFI: LENOVO v: N1WET31W (1.10 )
           date: 04/17/2017
Battery: ID-1: BAT0 charge: 21.6 Wh condition: 22.0/23.5 Wh (94%)
           ID-2: BAT1 charge: 21.4 Wh condition: 21.7/26.3 Wh (82%)
CPU: Topology: Dual Core model: Intel Core i5-7300U bits: 64 type: MT MCP L2 cache: 3072 KiB
           Speed: 800 MHz min/max: 400/3500 MHz Core speeds (MHz): 1: 792 2: 830 3: 809 4: 822
Graphics: Device-1: Intel HD Graphics 620 driver: i915 v: kernel
           Display: x11 server: X.Org 1.20.7 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz
           OpenGL: renderer: Mesa Intel HD Graphics 620 (KBL GT2) v: 4.6 Mesa 20.0.2
Audio: Device-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel
           Sound Server: ALSA v: k5.4.0-21-generic
Network: Device-1: Intel Ethernet I219-LM driver: e1000e
           IF: enp0s31f6 state: down mac: c8:5b:76:e3:99:5b
           Device-2: Intel Wireless 8265 / 8275 driver: iwlwifi
           IF: wlp58s0 state: up mac: f8:59:71:49:f6:2e
Drives: Local Storage: total: 476.94 GiB used: 272.06 GiB (57.0%)
           ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 960 PRO 512GB size: 476.94 GiB
Partition: ID-1: / size: 33.65 GiB used: 22.44 GiB (66.7%) fs: ext4 dev: /dev/nvme0n1p2
           ID-2: swap-1 size: 15.62 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/nvme0n1p4
Sensors: System Temperatures: cpu: 36.5 C mobo: N/A
           Fan Speeds (RPM): cpu: 0
Info: Processes: 236 Uptime: 1d 19h 44m Memory: 19.43 GiB used: 6.50 GiB (33.5%) Shell: bash inxi: 3.0.38

WORKAROUND:

This may have to do with a Kernel Regression or is at least Kernel related? (This is getting quickly above my pay grade.) I used Grub Customizer to boot with kernel 4.18.5-041805-generic and network connectivity/throughput is now functioning as it should.