By using DeepSeek, I may have managed to find out the source of the problem.
By running: iw list | grep "Supported interface modes" -A 10 Supported interface modes: * IBSS * managed * AP * AP/VLAN * monitor Band 1: Capabilities: 0x7c HT20 SM Power Save disabled RX Greenfield "Greenfield" is not appeared when I run the old "GOOD" kernel. "Greenfield" may cause problem to DHCP. Please advise how to remove "Greenfield" from the new kernels. I have tried various ways but still it is given to the output. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2092581 Title: Devices are not connected to the internet via hotspot Status in linux package in Ubuntu: New Bug description: From Kernel 5.15.0-125 and after, no mobile phone device can be connected to the internet via laptop hotspot. They can see my laptop but cannot be connected to it. I still use kernel 5.15.0-124 with Linux Mint. Note: Only one file is possible to get attached! Then how to send 2 files at a minimum requirement??? --- $ cat /proc/version_signature > version.log Ubuntu 5.15.0-130.140-generic 5.15.168 --- $ ubuntu-bug linux *** Collecting problem information The collected information can be sent to the developers to improve the application. This might take a few minutes. ....................................................................... *** Problem in linux-image-5.15.0-130-generic The problem cannot be reported: This does not seem to be an official Linux package. Please retry after updating the indexes of available packages, if that does not work then remove related third party packages and try again. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2092581/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp