Audio issue when HDMI drawing tablet is connected?

I’m running a 13″ Macbook pro 2017 with operating system Mojave 10.14.4.

I have an HDMI connected tablet (Huion Gt-220). When I connect my drawing tablet to my computer, it locks out my sound for the computer.

I’ve tried going into System Preferences and changing the output to internal speakers. I’ve gone into the Audio MIDI setup and tried to configure it from there as well.

In the audio MIDI setup I’ve also tried making a multi output and an aggregated device.

I’ve tried it with and without headphones. I can’t get it to work for the life of me. Does anyone else have any ideas on how to fix this? I’m dying here because I’ll need to watch/listen to classes at the same time as I work and I can’t seem to set it up.

What does it mean for two components to be connected?

It is my impression that in software engineering, a connection can mean many things depending on context and the level of abstraction at which some system is considered. I’m surprised no one has asked this before, as I feel that a connection is such a fundamental concept, but also very easy to misunderstand. I want to wash away any misunderstandings I might have, and thus I ask: What does it mean for two components to be connected? Additionally, how does the view of a connection differ from an software architecture perspective and an implementation perspective?

My current understanding of the concept of “connection” is that two components (or entire systems) have some agreement with eachother to exchange data across some interface. This is usually accomplished through initial request from one part, a subsequent process of handshaking, synchronization and eventually some communication session.

Do i need to implement Security for my webpage, if it is only connected to a LAN

I am making a websocket server that can communicate with clients.

This server is going to be on a private vLAN channel on a public place, AKA only the staff have access to the network which the server is on.

When this is the case, do i need to implement SSL or any other form of security, if the “hackers” cant get access without being connected to the vLAN?

Automatically disable mobile hotspot when no device is connected, using Tasker

I am trying to create a task which automatically disables mobile hotspot (tethering) when no device is connected. I successfully created similar tasks for bluetooth and wifi, however wifi mobile hotspot I seem not to able to get information on how to check if there are clients currently connected or when no client is connected. I researched a bit, a got a hint that this code :

ip neigh show dev wlan0  | grep -i -e reachable -e delay | grep  

can give information on clients currently connected to hotspot.

This was the output in terminal:

u0_a209@hws8701:/ $   su  -i -e reachable -e delay | grep -o' ..\:..\:..'                              < unknown option --  usage: grep [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZz] [-A num] [-B num] [-C[num]]         [-e pattern] [-f file] [--binary-files=value] [--color=when]         [-e pattern] [-f file] [--binary-files=value] [--color=when]         [--context[=num]] [--directories=action] [--label] [--line-buffered]         [pattern] [file ...] [1] + Done                 ip neigh show dev wlan0 |       Stopped (signal)     grep -i -e reachable -e delay |       Done (2)             grep -o" ..\:..\:.." 2|root@hws8701:/ # 

however I don’t know how to manipulate this code to get more useful information to create a variable for zero clients connected.

Connected boundary implies $\pi_1(M,\partial M)=0$.

I have two questions: Let $ M$ be a compact connected manifold with boundary.

1, If the boundary $ \partial\tilde{M} $ of universal covering $ \tilde{M}$ is connected, is $ \partial M$ connected? How about converse direction, if not, any counterexamples?

2, Does connectedness of boundary $ \partial M$ imply $ \pi_1(M,\partial M)=0$ , if not, any counterexamples?

If $ M$ is not necessarily compact, will it be different?

Thanks for your help.

Nginx Ingress 504 timeout – EKS with ELB connected to nginx ingress

We are using a NLB in AWS connected to our EKS cluster via a nginx ingress controller. Some of our requests get a random 504 gateway timeout.

We think we debugged the problem to our nginx ingress. Based on some Stackoverflow recommendations we played around with Connection headers. 1) We set Connection “close” this had no effect 2) We set Connection “keep-alive” again no effect

We also noticed another behavior with our proxy_read_timeout when it was 60seconds our request from the browser would be fulfilled at 60.xx seconds. When we reduced it to 30 it became 30.xx, 20 became 20.xx. We went to 1 but still get random 504 gateway timeouts and do not understand why proxy_read_timeout has this behavior in our environment.

We want to understand what is the effect of proxy_read_timeout and why do we get above behavior? Also is there a way to set Connection “” on our nginx ingress (we are not able to do this via “”)

Thanks in advance!

Run SFC on an Externally connected Hard Drive

Issue: The PRECISE command line text to run SFC (System File Check) on an EXTERNALLY connected. Situation: Host computer: Windows 7 It’s Windows HD partition is “C”. Connected HD: – Connected DIRECTLY to Host logic board. – Has Windows 7 installed on it. – Drive Letter of Windows partition = “E” In your response PLEASE show the PRECISE command line in TOTAL. Thanks – in advance – for your attention and response. Patrick

My IP changes every 10 seconds while connected to internet

I am not a network engineer, I just wanted to check if port 16000 is open for me. I went to and it showed my IP as However after 15-20 seconds, I refreshed the page, and my IP got changed to

Seems like stays as my IP for around 10 seconds and stays as my IP for 30 odd seconds. And this is a continuous endless process.

End goal is to forward port 16000 on my system. My ISP is Broadway Communication in Bangalore, India. They use MAC addressing. Also I am using TP-Link_D72E router.