Lenovo X200T can't connect to 5Ghz Wifi
Hi there,
I recently changed my hotspot exclusively to 5Ghz to keeping it connected to my Raspberry Pi 4 (it has issues with the 2.4Ghz connections).
Now that I have upgraded, my laptop is no longer connecting to my hotspot for some reason. I know it has something to do with switching it to a certain channel (unsure if it's the laptop or the wifi that I will have to edit) but I don't know how to go about it.
Here are some details with my wifi card:
iwconfig
lo no wireless extensions.
enp0s25 no wireless extensions.
wlp2s0 IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=16 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
virbr0 no wireless extensions.
wg0 no wireless extensions.
sudo lshw -C network
*-network
description: Ethernet interface
product: 82567LM Gigabit Network Connection
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
logical name: enp0s25
version: 03
serial: 00:26:2d:f0:6d:4c
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=5.15.0-139-generic firmware=1.8-3 latency=0 link=no multicast=yes port=twisted pair
resources: irq:28 memory:e1600000-e161ffff memory:e1624000-e1624fff ioport:3000(size=32)
*-network
description: Wireless interface
product: AR9287 Wireless Network Adapter (PCI-Express)
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 01
serial: 4c:0f:6e:94:cb:a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=5.15.0-139-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:17 memory:e1500000-e150ffff
Please let me know which commands I can use to get closer to an answer, cause iw reg commands are not working.
All inquiries and advice would be well appreciated
Thank you
So far I have only have experience with this card to work properly on newer computers.
03:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter (rev 01)
My older laptops used some other models, also Atheros.
According to the specification, the AR9287 only supports 2.4GHz:
https://deviwiki.com/files/Atheros/specsheets/AR9287.pdf
It's not clear why you must change your router to "only" do 5GHz. It should be able to support both at the same time. Then work on your Raspberry Pi to only use the 5GHz part.
I see. Well, I guess I can just buy a new wireless mini card that supports dual band. There are some on the market.
In the meantime, I can take your advice and force the pi to accept only 5Ghz. Just trying to look into that now and not to sure were to begin. I know it's to do with finding a specific frequency and editing a text file somewhere. wpa_supplicant.conf I think?