next interesting finding: last time switching on my notebook I pressed the wifi key before booting (during the bios init phase).
this caused another output for rfkill:
$ sudo rfkill list 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no
and wifi was working! the very interesting thing is that the dell-wifi entry is missing.
next interesting finding: last time switching on my notebook I pressed the wifi key before booting (during the bios init phase).
this caused another output for rfkill:
$ sudo rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
and wifi was working! the very interesting thing is that the dell-wifi entry is missing.