WiFi frequency channel change
Solution 1
Interface has to be in monitor mode. First bring it down with ifconfig wlo1 down Then change it with iwconfig wlo1 mode monitor Bring it back up ifconfig wlo1 up Change channel iwconfig wlo1 channel 40
Solution 2
Sometimes changing channel will be on auto mode therefore these command won't helpful because it changes to 5GHz or 2.4GHz automatically
iwlist
channel shows which channel to select.
iwconfig wlp2so freq 2.4G
iwconfig wlp2so channel 44
You need to make changes on wireless router and set manual channel select. See the image below
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bombelsky
Updated on September 18, 2022Comments
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bombelsky over 1 year
I am trying to change wifi channel to one that will use 5GHz frequency.
iwconfig lo no wireless extensions. wlo1 IEEE 802.11abg ESSID:off/any Mode:Managed Frequency:5.2 GHz Access Point: Not-Associated Retry short limit:7 RTS thr:off Fragment thr:off Power Management:on eno1 no wireless extensions.
Once I connect to my Wifi, frequency is switched to 2.4GHz
lo no wireless extensions. wlo1 IEEE 802.11abg ESSID:"PiotryStephy" Mode:Managed Frequency:2.412 GHz Access Point: C0:05:C2:BF:6F:79 Retry short limit:7 RTS thr:off Fragment thr:off Power Management:on eno1 no wireless extensions.
In my router settings there are both 2 and 5GHz frequencies allowed. There is no option to change "Mode:Managed".
These are my available channels:
iwlist channel lo no frequency information. wlo1 29 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 38 : 5.19 GHz Channel 40 : 5.2 GHz Channel 42 : 5.21 GHz Channel 44 : 5.22 GHz Channel 46 : 5.23 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 149 : 5.745 GHz Channel 153 : 5.765 GHz Channel 157 : 5.785 GHz Channel 161 : 5.805 GHz Channel 165 : 5.825 GHz Current Frequency:2.412 GHz (Channel 1) eno1 no frequency information.
When I am trying to change a channel:
sudo iwconfig wlo1 channel 40 Error for wireless request "Set Frequency" (8B04) : SET failed on device wlo1 ; Operation not supported.
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chili555 over 6 yearsIn
iwconfig
, it says "Mode:Managed." In that case, the router or other access point sets (manages) the channel, not the user. I suggest that you change the router to a fixed channel: 40. -
bombelsky over 6 yearsThanks for your reply. I changed to a fixed channel but it still connects only to a channels representing 2GHz frequencies. I can not disable this frequencies in router, because other user do not support 5GHz frequencies...
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chili555 over 6 yearsCan you assign a different SSID to the 5gHz segment; for instance, myrouter5 and the 2.4 gHz segment named myrouter24? That's the technique I use on both of my wireless routers.
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bombelsky over 6 yearsI tried doing this. And 5GHz is not recognized. Possible drivers issues of my
08:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01)
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chili555 over 6 yearsNot likely as the 5 gHz channels are recognized in
iwlist channel
. Did you try rebooting both the router and the computer? Is the 5 gHz segment set to fixed channel 40? -
bombelsky over 6 yearsYes, I tried rebooting. It is set to 40, but I tried manual mode with other channels and also with auto mode.
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chili555 over 6 yearsWhen the router is set to channel 40, does your Broadcom simply not see it? Does it appear in
sudo iwlist scan
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bombelsky over 6 yearsThanks for following this topic. It does not appear. There are no channels higher than 11
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chili555 over 6 yearsPlease see: h30434.www3.hp.com/t5/Notebook-Wireless-and-Networking/… Is it possible that only one wire is connected? Does the 5 gHz segment appear if you scan right next to the router?
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bombelsky over 6 yearsThank U. Distance from a router does not affect visibility of 5GHz networks. Might be a hardware problem indeed...
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