WIFI issue solved, however Bluetooth not yet.
This video has helped to solve the WIFI issue:
https://www.youtube.com/watch?v=vvzFYP8WjXo
A tiny switch at the front side of the laptop had turned off the WIFI
function. I switched the switch back to the on positition - from that
moment on, it was
Tests related to Bluetooth:
https://askubuntu.com/questions/641892/hcitool-scan-does-not-find-my-
bluetooth-device
According to this article, the command hcitool dev should need to
deliver a list of Bluetooth devices. I get this non-result - though I
have been using Bluetooth at the same laptop,
** Attachment added: "3a. Impossible to get Bluetooth enabled"
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/2065074/+attachment/5775993/+files/3a.%20Impossible%20to%20get%20Bluetooth%20enabled.png
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** Attachment added: "3. Bluetooth disbabled"
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/2065074/+attachment/5775992/+files/3.%20Bluetooth%20disbabled.png
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** Attachment added: "2. Enabling WIFI not possible."
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/2065074/+attachment/5775973/+files/2.%20Enabling%20WIFI%20not%20possible.png
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** Attachment added: "1a. Focus at mouse pointer at WIFI connection corner
right down under"
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/2065074/+attachment/5775972/+files/1a.%20Focus%20at%20%20mouse%20pointer%20at%20WIFI%20connection%20corner%20right%20down%20under.png
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