I recently upgraded my Ubuntu from 16.04 to 18.04 (clean install, full wipe). Now I can no longer connect to the corporate network at my office (perhaps related to these bugs: [bug 1](https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1748839?comments=all), [bug 2](https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1761003)). What proved to fix this issue in Ubuntu 16.04 is the answer to [this question](https://askubuntu.com/questions/690032/after-upgrade-to-15-10-wifi-to-a-corporate-network-wpa2-is-not-working-anymore); Downgrade `wpa_supplicant` to 2.1.

However, even with the linode repository, this fix can no longer be applied. There is no version for `wpa_supplicant` below 2.6 to the best of my knowledge for Ubuntu 18.04.

My question is this: How can I downgrade wpa\_supplicant to 2.1 for Ubuntu 18.04?

Configuration needed for corporate the wifi connection:

* Security: WPA & WPA2 Enterprise
* Authentication: Protected EAP (PEAP)
* Checkbox No CA certificate required.
* Inner authentication: MSCHAPv2