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Try the following:
- Enter a root environment in the terminal:
su -
Use your root password to authenticate when requested.
- If successfully authenticated, run the command from within the
rootterminal:
echo “blacklist bcma-pci-bridge” > /etc/modprobe.d/bcma-pci-bridge.conf
The sudo part shouldn’t be necessary.

Be extremely careful in the root terminal, as there is the very real danger of breaking you system completely 

Tip:
When posting terminal output, copy the output and paste it here, wrapped in three (3) backticks, before AND after the pasted text. Like this:
```
pasted text
```
This will just cause it to be rendered like this:
Sed
sollicitudin dolor
eget nisl elit id
condimentum
arcu erat varius
cursus sem quis eros.
Instead of like this:
Sed sollicitudin dolor eget nisl elit id condimentum arcu erat varius cursus sem quis eros.
Alternatively, paste the text you wish to format as terminal output, select all pasted text, and click the </> button on the taskbar. This will indent the whole pasted section with one TAB, causing it to render the same way as described above.
Thereby increasing legibility thus making it easier for those trying to provide assistance.
For more information, please see: