228
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 ...
61
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 ...
- 57.5k
48
votes
Accepted
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 ...
- 466k
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 ...
- 73.6k
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 ...
- 93.8k
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 ...
- 431
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 ...
- 50k
23
votes
Accepted
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 ...
- 73.6k
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 ...
- 3,082
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 ...
- 2,479
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 ...
- 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 ...
- 23.2k
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 ...
- 9,213
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 ...
- 130k
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 ...
- 17k
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, ...
- 349
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 ...
- 27.6k
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 ...
- 1,556
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, ...
- 64k
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 ...
- 73.6k
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 ...
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 ...
- 466k
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 ...
- 180
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;...
- 58.5k
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 ...
- 66
4
votes
How can I extend the desktop across 8 VGA monitors so they operate as one large monitor from one PC?
If your graphics cards are Nvidia, they have a software called Surround Vision that turns any amount of monitors into a single one. http://nvidia.custhelp.com/app/answers/detail/a_id/2667
If you have ...
- 3,747
4
votes
Accepted
My Notebook always thinks there is a VGA monitor plugged in
I tested the input pins against the GND pin, and found out two of them (pins 4 and 11), which should be N/C (so, probably pulled up), are exactly at GND's level.
You are correct, pulling pins 4 and ...
- 9,466
4
votes
What are differences between VBoxVGA, VMSVGA and VBoxSVGA in VirtualBox?
I was able to auto set the resolution of the guest with wayland compositor only using VBoxSVGA. virtualbox-guest-additions couldn't auto-resize guest display with wayland when using VMSVGA.
- 335
Only top scored, non community-wiki answers of a minimum length are eligible