I have a dual boot system (Ubuntu 18.04, Win 10) on which my internet speed is ~70Mbit/s on both Ubuntu and Windows, but after a few minutes it drops to only ~50kbit/s on Ubuntu, making internet basically unusable.
From Ubuntu:
$ iwconfig
wlxe84e06453c21 IEEE 802.11
Mode:Managed Frequency:2.437 GHz
Bit Rate=72.2 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B 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:44427 Missed beacon:0
which seems to indicate the connection is set up properly at the correct bit rate, but this is not what I get in practice.
For completeness (ethernet connections omitted):
$ sudo lshw -C network
*-network:1
description: Wireless interface
physical id: 3
bus info: usb@3:4
logical name: wlxe84e06453c21
serial: e8:4e:06:45:3c:21
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=rtl8192cu driverversion=4.15.0-33-generic firmware=N/A ip=10.0.1.7 link=yes multicast=yes wireless=IEEE 802.11
lsmod output:
rtl8xxxu 122880 0
rtl8192cu 73728 0
rtl_usb 20480 1 rtl8192cu
rtl8192c_common 57344 1 rtl8192cu
rtlwifi 77824 3 rtl_usb,rtl8192c_common,rtl8192cu
mac80211 778240 7 rt2800lib,rt2x00lib,rt2x00usb,rtl_usb,rtlwifi,rtl8192cu,rtl8xxxu
cfg80211 622592 3 rt2x00lib,mac80211,rtlwifi
Given that the hardware and router are identical between the Windows and Ubuntu install, I'm left to believe there's a bad Linux driver or config somewhere. Any tips on where to look appreciated.
UPDATE: This is not a duplicate of the bug marked by chili555. I don't experience freezing and blacklisting the rtl8192cu driver does not resolve the issue.
