Bug#915008: I've seen a similar problem and managed to work around it.

(Disclaimer, don't know if it's exactly the same problem). On one of our DELL Lattitude 5400 laptops the wifi stopped working, giving: Jul 27 22:00:04 oceanic kernel: [ 141.298350] iwlwifi :00:14.3: enabling device ( -> 0002) Jul 27 22:00:04 oceanic kernel: [ 141.323938] iwlwifi :

Bug#915008:

see also: https://bugzilla.kernel.org/show_bug.cgi?id=201813

Bug#915008: firmware-iwlwifi: latest firmware broken for Intel AC9560

Package: firmware-iwlwifi Version: 20180825+dfsg-1 Severity: important Tags: upstream Dear Maintainer, * What led up to the situation? -> Upgrade of the firmware package * What exactly did you do (or not do) that was effective (or ineffective)? -> Downgrading firmware seems ineffe