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## macbook-air-13-sd.md

      
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                dododevs
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              Created
              February 15, 2021 18:43
            
              
                Macbook Air 13" 6,2 (mid 2013) SD Card Reader on Linux
              
          
    Macbook Air 13" 6,2 (mid-2013) SD Card Reader on Linux

The problem

Macbook Air 6,2's hardware comes with a decently annoying issue: the processor's southbridge (codenamed Lynx Point) has a problem with the internal SD card reader (with USB 3.0 devices in general) which makes it unusable after returning from S3 state (suspend-to-ram). The device spontaneously detaches and doesn't appear to come back on when the system resumes. More on that on Wikipedia.
On Mac OS X and macOS the issue doesn't seem to be present - the driver probably takes care of it - but Linux distributions don't currently have a viable solution.
However, there is a workaround.
The workaround


## headead.txt
Il normale funzionamento dell'app Headead non richiede accettazione di particolari privacy policy. L'app non memorizza né
diffonde dati personali, account, dati della SIM, dati sul posizionamento e database dell'utente.
Tutti i dati rimangono di proprietà esclusiva dell'utente.

## expect_demo.sh
#!/usr/bin/env expect

spawn bluetoothctl # start the process you want to talk with
expect -re {\[bluetooth\]} # wait for a particular input to come in based on the regex
send "default-agent" # generate whatever output and send it to the process
send "\n"

interact # drop to an interactive session with the open process
	Il normale funzionamento dell'app Headead non richiede accettazione di particolari privacy policy. L'app non memorizza né
	diffonde dati personali, account, dati della SIM, dati sul posizionamento e database dell'utente.
	Tutti i dati rimangono di proprietà esclusiva dell'utente.
	#!/usr/bin/env expect

	spawn bluetoothctl # start the process you want to talk with
	expect -re {\[bluetooth\]} # wait for a particular input to come in based on the regex
	send "default-agent" # generate whatever output and send it to the process
	send "\n"

	interact # drop to an interactive session with the open process