@diavolino: Thanks, you provided all the right info in the right way
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Unfortunately, that model's has been supported for a few days now, so you mist be doing something wrong somewhere...
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@Aeris: I see an SSHD, which, yeah, of course is running, it's a daemon, that's the job
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And I see a bunch of sftp processes, which probably means that something is handling sftp like crap on your end of things
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Check with htop in tree mode (or ps faux) to see what's hogging the sftp subsystem.
That, and define 'closed', because without some context it doesn't mean much
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