my problem was not related to the driver but to an unresolved bug of knetworkmanager (network-manager-kde on Kubuntu), https://bugs.kde.org/show_bug.cgi?id=209673, which wrongly handles the certificate.
my problem was not related to the driver but to an unresolved bug of knetworkmanager (network- manager- kde on Kubuntu), /bugs.kde. org/show_ bug.cgi? id=209673, which wrongly handles the certificate.
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