hdmi interview questions

Top hdmi frequently asked interview questions

How can I switch an application to a different playback device on Windows 10

Googling for solutions to this problem seems to lead to third party solutions like this, sometimes with scripting like this. I'm no stranger to either, but It seems crazy to me that there isn't a better solution.

I'm on Windows 10. I use HDMI audio to my monitor from my AMD video card, and I use a set of headphones plugged into the back of my motherboard. I use both often, but right now I need to tediously switch the default playback device to switch between them (sometimes, for reasons I don't yet know how to replicate, I even need to fully disable the device currently making sounds.

This is what I see in the volume mixer after starting my computer up with AMD HDMI as the default, and opening Chrome to watch a video:

AMD HDMI is playing System Sounds and Chrome's audio.

When I switch to the Speakers device

About to select Speakers device.

I see that it is not assigned any applications, and I see no way to reassign applications:

Speakers device is lonely.

I can usually hammer all of the applications over to the Speakers device by switching the default playback device, and usually vice versa. But that sometimes that only switches some applications, and sometimes it doesn't do anything. But that's besides the point...

How can I assign an application to a specific audio playback device? The Volume Mixer looks like the right place, but it doesn't seem to do it unless I'm missing something.

Source: (StackOverflow)

What kind of cable looks like HDMI but has only one slanted edge?

What kind of cable/connector is this? It looks like an HDMI connector, with very similar pins, but it has a slanted edge on only one side and the other side is square.

Source: (StackOverflow)

Image doesn't fill monitor when connected via HDMI [duplicate]

Possible Duplicate:
Overscan in Catalyst Control Center

Connecting a Dell Studio Slim to a Dell ST2210 21.5" monitor. The PC has a ATI Radeon HD 4350 video card. The video card has DVI and HDMI connections. When I connect with the DVI everything works fine. When I connect with the HMDI the image doesn't fill the screen, i.e. there's a approx 1 inch black border around the image. Win7 tells me the res is 1920x1080 (the native res of the monitor). Tried rebooting, no luck.

Source: (StackOverflow)

Send only video out with HDMI cable

My laptop has an HDMI out port and my new TV has HDMI in ports. Hooking them up so that I can use the laptop to play movies with sound on the TV works fine. However, I haven't been able to find a way to send out just video without sound. Sometimes I want to keep the audio coming through my laptop speakers so I can put headphones on and not have everyone around me tell me to turn the sound down... is there a way to do that?

Source: (StackOverflow)

how do I connect an Apple Thunderbolt display to a PC?

I have this Apple Thunderbolt display.

it works fine with my Macbook Pro. I also want to connect it to my Windows laptop via HDMI. I bought this converter, which converts the HDMI signal to DisplayPort. Everything plugs in just fine, but the display just does not turn on. I tried a variety of resolution settings.

Note: this display does not have a power button. It just turns on when I plug it into a Mac. There is no activity when I plug it into the DisplayPort converter.

Source: (StackOverflow)

Converting DisplayPort and/or HDMI to DVI-D?

Newer Radeon video cards come with four ports standard:

  • DVI (x2)
  • HDMI
  • DisplayPort

enter image description here

If I want to run three 24" monitors, all of which are DVI only, from this video card -- is it possible to convert either the HDMI or DisplayPort to DVI? If so, how? And which one is easier/cheaper to convert?

I did a little research and it looks like there isn't a simple "dongle" method. I found this DisplayPort to DVI-D Dual Link Adapter but it's $120; almost cheaper to buy a new monitor that supports HDMI or DisplayPort inputs at that point!

There's also a HDMI to DVI-D adapter at Monoprice but I'm not sure it will work, either.

AnandTech seems to imply that you do need the DisplayPort-to-DVI:

The only catch to this specific port layout is that the card still only has enough TMDS transmitters for two ports. So you can use 2x DVI or 1x DVI + HDMI, but not 2x DVI + HDMI. For 3 DVI-derived ports, you will need an active DisplayPort-to-DVI adapter.

Source: (StackOverflow)

Does a HDMI-to-DVI (dual link) adapter exist? I don't care about the price

My monitor supports full-resolution display (2560x1440) only when connected to through either the DVI-D dual link port, or the DisplayPort.

My laptop, though, has neither of these two kinds of output. Instead, all it's got is a HDMI port (which is version 1.3, and I also read that the laptop's graphics chipset supports 2560x1440 at 60Hz).

So I'm wondering whether anyone has ever seen an HDMI-to-DVI dual link adapter, which will carry my ultra-highres signal to the monitor I just bought. So far I haven't seen any, and don't even know whether such an adapter (which I understand would have to be active, USB-powered and expensive (but I don't care)) exists.

Source: (StackOverflow)

Is it possible to power on/off a monitor using the computer?

I was wondering if it was possible to power on/off a display using a computer connected via HDMI. Let me explain :

I want my computer to power off my monitors (not standby mode) when I don't use it (no keyboard/mouse input) for more than 15 minutes, and power them back when such input is received. My monitors are connected over HDMI, so I was wondering if it was possible to use the CEC functionality with a computer. If is it possible, then is there a hardware requirement ?

My point is that I often take a break from my computer, but forget to turn off the screens, and I would prefer to shut down the screens completely instead of putting them to standy mode

Thanks a lot

Source: (StackOverflow)

Is there any benefit of using HDMI over DVI?

I recently bought a Mac mini. It comes with an HDMI to DVI adapter. I bought a LG monitor that has an HDMI port.

My concern is: Is there any improvement when I connect the Mac Mini to the monitor using an HDMI cable?

Currently I am connecting to the monitor's DVI port via the adapter and it is working fine. I need to know whether there's any difference in using the HDMI port directly.

Source: (StackOverflow)

Maximum resolution through VGA/DVI/HDMI(/etc)?

I know the original VGA standard was meant to output 640x480 and that other standards over the original VGA connector are developed to output a higher resolution. (SVGA, XGA, etc.) But I was wondering if there's a specific limit to the resolution that the VGA connector can take.

Furthermore, are, and if so how are for example DVI and HDMI limited on resolution?

Source: (StackOverflow)

HDMI with resolution 2560 x 1440 possible?

I have an Acer 1810T and am going to buy a Dell u2711 with a resolution of 2560 x 1440.

Can I connect the panel over HDMI with the Acer and use the 2560 x 1440 res?

Source: (StackOverflow)

Cleaning computer cables In the dishwasher

A large quantity of assorted computer cables came into my possession. The collection includes almost every type of computer-related cable (video, USB, Ethernet, printer, audio and speaker, SATA, power, etc.). I'm focused here on just passive cables, nothing with active electronics or things like power bricks. They became dirty in storage and need to be cleaned.

Most of us have probably heard about washing a keyboard in the dishwasher, and now I am wondering if the same method can be applied to dirty cables. My assumption is that because the older PS2 keyboards used in these dishwashing experiments have their own cables attached, what could be the difference?

Some of the possible concerns I can envision with using a dishwasher to clean them:

  • Cable construction could be different from a keyboard cable and the materials and fastenings might not hold up to dishwasher cleaning.
  • Dishwasher water temperature might be too hot for the materials used in some kinds of cables.
  • Immersing some kinds of cables in water might be bad for them, so some might be cleanable in a dishwasher and some not.

My assumption is that if all kinds of cables cannot be safely cleaned in this way, cables fall into just a few broad categories that drive what would be dishwasher-safe.


  1. Dishwashability

    What characteristics (for example, type of construction or type of use), would differentiate computer-related cables that should not be cleaned in a dishwasher, and why?

  2. Scope of risk

    If a computer cable is put through the dishwasher and is adversely affected in a way that isn't externally visible (so it would be used rather than discarded), would it be only the cable that was affected? Or, is there any kind of computer cable where the kinds of adverse effects that could come from cleaning in a dishwasher could damage the equipment it's plugged into?

Source: (StackOverflow)

HDMI vs Component vs VGA vs DVI vs DisplayPort

What are the pros and cons of each of these different display adapters and cables?

From what I can understand, HDMI offers the ability to send audio along the same cable as well as the ability to do progressive scan.

I've Googled but I can't seem to find any real answers. Why would someone care to run 1280x1024 over HDMI or DVI instead of VGA? What about component?

All I hear is one is digital and one is analog, but I can't find what that means from a feature/benefit stand point.

Source: (StackOverflow)

Triple monitor setting in Linux with USB-HDMI adapter

I'm trying to set up a triple monitor desktop at my office using Fedora 17, but it seems impossible, let me explain the setting:

  • Laptop ASUS K53SD with 2 graphic cards, Intel and nVidia (Screen controled by Intel card)
  • 24" Full HD monitor connected to the HDMI output (controlled by Intel card)
  • 23" Full HD monitor connected to an USB-HDMI adapter (via framebuffer in /dev/fb2, apparently)
  • VGA output (not used) controlled by nVidia card

First of all, the USB-HDMI adapter works perfectly, it gives me a green screen (which means the communication is OK) and I can make it work if I set up a single monitor setting via framebuffer in Xorg. Here I leave the page where I got the instructions:

Now I'm trying to set up the the two main monitors (laptop and 24") with the intel driver and the 23" with the framebuffer, but the most succesful configuration I get is the two main monitors working and the third disconnected.

Do you have any idea what can I do to make this work?

Here I leave my xRandr output and my Xorg conf:

-> xrandr
Screen 0: minimum 320 x 200, current 3286 x 1080, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
   1366x768       60.0*+
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA2 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 531mm x 299mm
   1920x1080      60.0*+   50.0     25.0     30.0  
   1680x1050      59.9  
   1680x945       60.0  
   1400x1050      74.9     59.9  
   1600x900       60.0  
   1280x1024      75.0     60.0  
   1440x900       75.0     59.9  
   1280x960       60.0  
   1366x768       60.0  
   1360x768       60.0  
   1280x800       74.9     59.9  
   1152x864       75.0  
   1280x768       74.9     60.0  
   1280x720       50.0     60.0  
   1440x576       25.0  
   1024x768       75.1     70.1     60.0  
   1440x480       30.0  
   1024x576       60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   720x576        50.0  
   848x480        60.0  
   720x480        59.9  
   640x480        72.8     75.0     66.7     60.0     59.9  
   720x400        70.1  
DP1 disconnected (normal left inverted right x axis y axis)
   1920x1080_60.00   60.0  

The Xorg file:

# Xorg configuration file for using a tri-head display

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "HDMI" 0 0
    Screen      1  "USB" RightOf "HDMI"
    Option         "Xinerama" "on"

########### MONITORS ################

Section "Monitor"
    Identifier     "USB1"
    VendorName     "Unknown"
    ModelName      "Acer 24as"
    Option         "DPMS"

Section "Monitor"
    Identifier     "HDMI1"
    VendorName     "Unknown"
    ModelName      "Acer 23SH"
    Option         "DPMS"

########### DEVICES ##################

Section "Device"
    Identifier     "Device 0"
    Driver         "intel"
    BoardName      "GeForce"
    BusID          "PCI:0:02:0"
    Screen          0

Section "Device" 
    Identifier     "USB Device 0" 
    driver         "fbdev" 
    Option         "fbdev" "/dev/fb2" 
    Option         "ShadowFB" "off"

############## SCREENS ######################

Section "Screen"
    Identifier     "HDMI"
    Device         "Device 0"
    Monitor        "HDMI1"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24

Section "Screen"
    Identifier     "USB"
    Device         "USB Device 0"
    Monitor        "USB1"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24

Source: (StackOverflow)

Does the HDMI port on a video card support audio?

When purchasing a video card based on nVidia or AMD, does the HDMI port support audio as well as video?

For what it's worth, I'm running Xubuntu 14.04.

Here's an example of a video card with built-in HDMI:

Please note, that is just an example, please do not flag this as a shopping question!

Source: (StackOverflow)