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221 votes
Accepted

What are differences between VBoxVGA, VMSVGA and VBoxSVGA in VirtualBox?

Based on what I've found in the source code: VBoxVGA This emulates a graphics adapter specific to VirtualBox, the same as in previous versions (<6.0.0). This is the default for images created ...
60 votes

I have a laptop with an HDMI port and I want to use my old monitor which has VGA port. Do I need HDMI-to-VGA or VGA-to-HDMI adapter?

You need a HDMI-to-VGA adapter. Your laptop is outputting an HDMI signal which has to be converted to VGA. Some connectors are physically different, but use identical signaling - in these cases a ...
gronostaj's user avatar
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48 votes
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How does VGA work with resolutions higher than the maximum resolution?

"VGA" has two meanings: A specific graphics card, the IBM Video Graphics Array from 1987, which supported resolutions up to 640×480 (now known as the "VGA" resolution), and which ...
u1686_grawity's user avatar
47 votes
Accepted

Is it safe to unplug an extra monitor from a laptop without turning off the monitor?

Best practice is to always power off any devices that are not designed to be hot-pluggable before disconnecting them. VGA is not hot-pluggable, therefore its cables are not designed to be ...
Keltari's user avatar
  • 73k
36 votes

What are differences between VBoxVGA, VMSVGA and VBoxSVGA in VirtualBox?

But they do tell you quite explicitly when you should prefer them: – VBoxSVGA: The default graphics controller for new VMs that use Linux or Windows 7 or later. This graphics controller improves ...
Mokubai's user avatar
  • 92.3k
33 votes

Dual monitors won't "wake up" after sleep

I had a similar issue with one of my dual monitors not showing up after resuming from sleep. I used the keyboard shortcut Ctrl+Shift+Win+B to restart the graphics driver and my main screen flickered ...
import random's user avatar
26 votes

I have a laptop with an HDMI port and I want to use my old monitor which has VGA port. Do I need HDMI-to-VGA or VGA-to-HDMI adapter?

Many people get this the wrong way round. Signals go from > to You might think you're connecting your display to your computer, but you're not. You're connecting the computer to the display. This ...
Tetsujin's user avatar
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23 votes
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Can a VGA monitor be connected to parallel port?

Unfortunately, no. You would not be able to connect a monitor to a parallel port. They were designed for slow devices, like printers, scanners, etc. Not to mention it would require special device ...
Keltari's user avatar
  • 73k
22 votes

What are differences between VBoxVGA, VMSVGA and VBoxSVGA in VirtualBox?

Performance is one difference. Testing with glxgears, I get: VBoxVGA: 60fps +/- 2 (very low, but moving a window around is not smooth so it seems plausible) VMSVGA: 1570fps +/- 50 (after a reboot, I ...
Luc's user avatar
  • 2,943
22 votes

How does VGA work with resolutions higher than the maximum resolution?

VGA is an older signalling standard where a pixel is transmitted on only three pins by using analog voltages. Each of these voltages is represented as a voltage level between 0 volts (no intensity) ...
harrymc's user avatar
  • 476k
15 votes

Can a VGA monitor be connected to parallel port?

Parallel? No not without a lot of skill and patience and a probably-still suboptimal result. Parallel is just too slow for graphics. A serial console on the other hand, can present text characters ...
Criggie's user avatar
  • 2,429
10 votes

Can a VGA monitor be connected to parallel port?

I started to wonder if this might actually be possible, if one were to bit-bang the parallel port signals and synthesise VGA signalling. However, a VGA dot clock is 25.175MHz and a parallel port in ...
Frog's user avatar
  • 201
9 votes

I have a laptop with an HDMI port and I want to use my old monitor which has VGA port. Do I need HDMI-to-VGA or VGA-to-HDMI adapter?

I'll go through your Q point by point. Do I need (hdmi to vga adapter) OR (vga to hdmi adapter)? My common sense would tell (vga to hdmi adapter), but I am not 100% sure. Well, the exact naming of ...
sleske's user avatar
  • 23k
7 votes

Why are console capabilities stuck in the seventies?

Regarding Linux specifically, the usual reason I've heard is "we don't want it in the kernel". Especially when it comes to fonts and languages – no kernel developer wants to fall down the slope of ...
7 votes
Accepted

Can a VGA monitor be used with a DVI/HDMI graphics card?

As per the Wiki article on DVI: A passive DVI-to-VGA adapter. This adapter will not work with a DVI-D output. It requires a DVI-I or DVI-A output to get the analog signal to a VGA input (even if ...
Seth's user avatar
  • 9,145
6 votes

Can a VGA monitor be used with a DVI/HDMI graphics card?

Any VGA only monitor in this day and age is seriously obsolete - most older monitors would be at least DVI capable. Your video card reflects that and has no ports that can be "passively" converted ...
Journeyman Geek's user avatar
  • 129k
6 votes

Can a VGA monitor be used with a DVI/HDMI graphics card?

If you look at the Wikipedia article for DVI, especially the pinout, you'll see that DVI also can carry analog signals (the variant called "DVI-A"). That's why DVI to VGA adapters work: They take the ...
dirkt's user avatar
  • 16.8k
6 votes

Is it safe to unplug an extra monitor from a laptop without turning off the monitor?

Some monitors might have problems with incorrect timing. (I don't want to describe how CRT and LCD monitors work, etc. See Wikipedia pages or OSDev for that.) Some monitors, both CRT and LCD, ...
jiwopene's user avatar
  • 351
5 votes
Accepted

How to use the VGA/DVI/HDMI backward campatibility feature of DisplayPort?

DisplayPort is compatible through all of these connections via different adapters: DisplayPort to VGA DisplayPort can be adapted to VGA with an active adapter, as it does not output an analog signal ...
Jonno's user avatar
  • 21.2k
5 votes
Accepted

Is a DVI to VGA adapter reversible?

Passive DVI to VGA The DVI connector spec provides for pins for an analog signal as well as digital. That design is primarily to allow a computer to provide both analog and digital output through ...
fixer1234's user avatar
  • 27.4k
5 votes
Accepted

HDMI (M) to VGA (F) vs HDMI (F) to VGA (M) - Why does one type need USB power?

There is an important distinction between those two devices. The first converts from HDMI to VGA, whereas the second converts from VGA to HDMI. They are not bidirectional converters. HDMI provides a ...
Tom Carpenter's user avatar
5 votes
Accepted

is VGA to HDMI cable is same as HDMI to VGA cable?

Because an active conversion is required between HDMI (digital) and VGA (analog), the direction does matter. In theory you could probably create a converter that detects the direction automatically, ...
Daniel B's user avatar
  • 62.5k
5 votes

Is VGA as good (ok) as HDMI for everyday computing and graphic design?

You are essentially asking is analog (VGA) as good as digital (HDMI). In some respects, it is. In others, it is not. For "general computing" it is fine. You said yourself, you are struggling to ...
Keltari's user avatar
  • 73k
5 votes

Can a VGA monitor be connected to parallel port?

I have an old system that I want to connect two monitors with. I have only one VGA port Then install a second video card. PCs have no limit to the number of VGA cards as long as you can find ...
Harper - Reinstate Monica's user avatar
5 votes

what exactly is VGA

It's not exactly a specific piece of hardware; it's multiple "standards" that were introduced by the IBM "PS/2 Display Adapter" graphics card – it could mean any of these depending ...
u1686_grawity's user avatar
4 votes

Why is the monitor image all washed out?

I have an ASUS VE278H 27" backlit LED monitor and NVIDIA GeForce 1060 running with Windows 10, and I noticed this issue recurred after some recent Windows updates, which I'm guessing reset the display ...
Darth Continent's user avatar
4 votes
Accepted

USB-to-VGA adapter or HDMI-to-VGA adapter

USB-VGA is going to be much more unreliable in any situation since it requires a special adapter. USB traditionally isn't even used for Video and is strictly a Data connection. I'd stick with HDMI-...
Jacob K's user avatar
  • 571
4 votes
Accepted

Is it safe to connect two VGA output ports together?

According to the VGA pinout pin 9 sends +5V from the computer to the monitor. If you connect two computers together, they'll be sending +5V at each other. While this might not be enough to immediately ...
Zinzire's user avatar
  • 66
4 votes
Accepted

Connecting an HDMI monitor to a VGA laptop without losing resolution

Your notebook has what is called Display Port, you need a display port to hdmi cable to get full resolution output. HP part number 749288-001 or equvalent Ports and connectors for the 840: 3 USB 3.0;...
Moab's user avatar
  • 58.3k

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