On 2023-11-16 10:06:17, Jaron Kent-Dobias wrote: > On Thursday, 16 November 2023 at 16:56 (+0800), Sadeep Madurange wrote: > > The AP is using frequency 5240MHz. This frequency is disabled on the > > T490 according to the output of iw list | grep -A 15 Frequencies:. > > Great, so we know the problem! > > The ArchWiki page I linked earlier [1] has some advice on checking whether > the firmware of your laptop is enforcing a hardcoded regulatory domain. This > might be the case if the laptop's hardware was originally intended for > another country. > > > I am in Singapore, and according to > > https://en.wikipedia.org/wiki/List_of_WLAN_channels, 5240MHz can be used > > here without restrictions. Additionally, I don't understand why this > > kicked in this week while working fine for about 2 months now. > > Probably the access point changed its frequency. If you can configure the > access point, you can set its channel to something supported. This is unlikely, because this is my home router. I didn't change the frequency there. I will investigate how to enable the frequency in the iw list along the lines you suggested, thanks! Although, is it normal that all the 5G frequencies are disabled like this? -- Regards, Sadeep PGP: 103BF9E3E750BF7E
