I loaded Ubuntu Mate 20.04 a few days ago and have not been able to connect to 5G since. I can connect to 2G without any problems. When I try to connect to 5G I enter password but after a few seconds it keeps asking me for the WiFi password again. The connection to 5 GHz worked flawlessly in Windows a few weeks ago but now not in Ubuntu.
My laptop computer is a Dell Latitude E6330 with release 20.04.3 LTS, kernel 5.11.0-41generic x86_64. The laptop has 8GB memory, an Intel i7-3540 M @ 3.00 GHZx4 processor with the Mesa DRI Intel HD Graphics 4000 card.
Not sure how to troubleshoot, can anybody help?
Here is the output of lshw -c network:
*-network
description: Ethernet interface
product: 82579LM Gigabit Network Connection (Lewisville)
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: eno1
version: 04
serial: f0:1f:af:3f:b1:3e
capacity: 1Gbit/s
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.11.0-41-generic firmware=0.13-3 latency=0 link=no multicast=yes port=twisted pair
resources: irq:26 memory:f7e00000-f7e1ffff memory:f7e39000-f7e39fff ioport:f080(size=32)
*-network
description: Wireless interface
product: Centrino Advanced-N 6205 [Taylor Peak]
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 34
serial: a4:4e:31:3d:91:94
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.11.0-41-generic firmware=18.168.6.1 6000g2a-6.ucode ip=192.168.1.10 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:31 memory:f7d00000-f7d01fff