>looks like lar_disable functionality was removed as of 5.5 kernel as a way to fix the firmware crash issue with iwlwifi, is that right?
>[...] i've tried replacing the wifi adapter but this happens on intel wireless-ac 3165, 8265, and 9260 dual band 160Mhz (currently installed adapter).
>[...] On Intel ax210ngw all 5ghz channels are disabled and cannot be used to transmit
So it's iwlwifi specifically.
>i should add that this happens on both windows and linux but at least on linux i had a way of disabling LAR so my regulatory domain gets detected properly and all the wifi channels/widths works as they should.
>[...]
on all 5.3 and earlier kernels, using lar_disable=1 all my channels work and i get a full 1733mbps link speed (5ghz ch.36 at 160mhz)as shown here
So it's not a Linux-specific issue. Rather it seems to be buggy firmware, and a method that OP was relying on to work around that bug was disabled because it was causing other issues with said buggy firmware.
>[...] i've tried replacing the wifi adapter but this happens on intel wireless-ac 3165, 8265, and 9260 dual band 160Mhz (currently installed adapter).
>[...] On Intel ax210ngw all 5ghz channels are disabled and cannot be used to transmit
So it's iwlwifi specifically.
>i should add that this happens on both windows and linux but at least on linux i had a way of disabling LAR so my regulatory domain gets detected properly and all the wifi channels/widths works as they should.
>[...] on all 5.3 and earlier kernels, using lar_disable=1 all my channels work and i get a full 1733mbps link speed (5ghz ch.36 at 160mhz)as shown here
So it's not a Linux-specific issue. Rather it seems to be buggy firmware, and a method that OP was relying on to work around that bug was disabled because it was causing other issues with said buggy firmware.