How to turn on a laptop without a USB cable and VGA?

modInfo · 2013-08-13 16:33:22

Today I connected the cable to the laptop http://i.imgur.com/5tfh2j4.jpg the USB and the other end to the VGA PC, turned on the laptop and Windows has installed drivers Unkown, had a laptop reset after installation to make new changes. Now I can not turn on the laptop without the USB cable connected to a PC and VGA. when trying to turn on a laptop without a USB cable connected to a laptop and VGA for PC is a laptop boots not only shows a black screen and a white line. when trying to run a laptop with USB and VGA connected to a PC the system starts up nicely, but it is in the GRUB menu and detach the USB or VGA from PC to grub freezes and have to restart the laptop with the USB connected to a laptop and VGA connected to a PC. I turn on my laptop with the USB cable connected to a laptop and vga connected to the PC and go into the bios it works as long as vga disconnecting from the PC, then freezes in the bios and you have to reboot. He recorded a video showing my problem: https://www.youtube.com/watch?v=QCIku8j4m9s

Photo which shows linux Disconnect and reconnect the VGA cable to the PC: http://i.imgur.com/iHiGJ9N.jpg

schmidtbag · 2013-08-13 19:36:23

What exactly is that cable supposed to do? Anyways, it wouldn't surprise me if the computer is actually booting just fine without the cable plugged in, but it's confused thinking that the VGA port it is the primary display. While I'm not sure why plugging in the cable triggers it, I also don't know what the cable is supposed to do, so there's a possibility the laptop is like "oh look an external display is plugged in, I'll go use it" only to find out it doesn't respond to normal signals and decides "nevermind, I'm going to use the default screen".

Try booting up normally without the VGA cable or USB. On your laptop's keyboard, you should have a key that looks like this:

Use that with the Fn key and see if that makes your display work again.

WonderWoofy · 2013-08-13 19:41:27

Try setting the bios back to the default maybe? It might also be good to indicate what kind of machine yu actually have (without requiring anyone to watch the video).

Also, I'm not sure if this has to do with english not being your primary language, but your post is very hard to parse.

schmidtbag · 2013-08-13 19:44:22

WonderWoofy wrote:

Try setting the bios back to the default maybe? It might also be good to indicate what kind of machine yu actually have (without requiring anyone to watch the video).
Also, I'm not sure if this has to do with english not being your primary language, but your post is very hard to parse.

I thought the same thing, about both of your points. But, this appears to be an OS problem, not a BIOS problem. Also, if you watch the video modinfo's post becomes much clearer to understand.

WonderWoofy · 2013-08-13 19:57:05

I would have agreed with you on that it is an OS problem, until the OP indicated that it this happened before he/she indicated that it happened in the bootloader.

Though now that I think about it... maybe grub was installed with these things plugged in. I think that grub has become so bloated these days that it tries to add only what it thinks it needs to the image before writing it to the MBR (and beyond). So maybe this has to do with that as well?

schmidtbag · 2013-08-13 20:05:33

WonderWoofy wrote:

I would have agreed with you on that it is an OS problem, until the OP indicated that it this happened before he/she indicated that it happened in the bootloader.
Though now that I think about it... maybe grub was installed with these things plugged in. I think that grub has become so bloated these days that it tries to add only what it thinks it needs to the image before writing it to the MBR (and beyond). So maybe this has to do with that as well?

I also though grub was the problem, as grub today can now boot using a specific display (I'm not too familiar with how that works). That's why I wanted to see if that Fn combo would work, as it'd prove if grub is simply trying to boot using the USB thingy.

modInfo · 2013-08-14 18:11:35

WonderWoofy wrote:

Try setting the bios back to the default maybe?

I tried set the bios back, but nothing helped.

WonderWoofy wrote:

I would have agreed with you on that it is an OS problem, until the OP indicated that it this happened before he/she indicated that it happened in the bootloader.

is not a problem with the system, the systems work well, the problem is only the start of

schmidtbag wrote:

Use that with the Fn key and see if that makes your display work again.

When the boots with cable, and disconnect it, then the system will freeze and restart is required
when I'm in the BIOS, and unplug it freezes bios, did not even help re-connect
Fn+F5 does not help, because the system is frozen

Last edited by modInfo (2013-08-14 18:11:46)

WonderWoofy · 2013-08-14 18:20:59

I don't understand how this is "not a problem with the system" when in the same post you say that this occurs in a booted system as well as from the bios and trying the switch the screen ouput "does not help, because the systemd is frozen".

I'm confused.

ANOKNUSA · 2013-08-14 23:38:31

I have no idea how to help with this right now--it's just too bizarre--but I do have a question that might get you closer: How did you even get to the point where connecting the laptop to a desktop's VGA port via USB was necessary? Put another way: How the hell could you possibly know that the only way to boot the system was by attaching that specific cable to those specific machines? There's a huge chunk of the story missing here. (You mention a "laptop reset," but that's not too clear.)

P.S.: Your cooling fan sounds like its running so fast, it could decapitate a horse. That would suggest a problem with the machine, in my mind. Firmware corruption, maybe.

nomorewindows · 2013-08-15 00:00:33

The second picture would show that I don't even think it likes the USB device you are trying to plug into it, either that or the USB port is toast. Are you sure it isn't supposed to be USB/video on one end and connect the other end?

schmidtbag · 2013-08-15 03:39:48

nomorewindows wrote:

The second picture would show that I don't even think it likes the USB device you are trying to plug into it, either that or the USB port is toast. Are you sure it isn't supposed to be USB/video on one end and connect the other end?

I too was thinking the USB port is fried, and keeping the cable plugged in somehow acts as an "electrical bandage".

modInfo · 2013-08-15 15:04:32

WonderWoofy wrote:

I don't understand how this is "not a problem with the system" when in the same post you say that this occurs in a booted system as well as from the bios and trying the switch the screen ouput "does not help, because the systemd is frozen".

This is not the fault of the OS, because every system freezes when disconnecting the USB cable.
here has something with a laptop.

But, but! Interesting fact that I found!
But the makings short between gnd and {pin 2,pin 3} on USB, the system boots as if he had connected the vga cable and USB

Last edited by modInfo (2013-08-15 15:05:21)

nomorewindows · 2013-08-15 20:54:17

Those are signal lines.

aocab · 2013-08-15 21:39:53

schmidtbag wrote:

<snip>there's a possibility the laptop is like "oh look an external display is plugged in, I'll go use it" only to find out it doesn't respond to normal signals and decides "nevermind, I'm going to use the default screen". <snip>

@schmidtbag: That is what I think is happening.

@modInfo: You could try adding something like the following to your kernal command line to disable the external vga.

video=VGA-1:d

See the section on "How to force enabling or disabling a connector?" here:
https://www.osadl.org/Single-View.111+M … ea7.0.html

On a side note:
Why are you connecting the laptop's vga(out) to the desktop's vga(out)?

Shouldn't you be connecting the laptop's vga(out) to the vga(in) on a TV or projector?

HTH (Hope this helps)

cfr · 2013-08-15 21:47:35

WonderWoofy wrote:

I don't understand how this is "not a problem with the system" when in the same post you say that this occurs in a booted system as well as from the bios and trying the switch the screen ouput "does not help, because the systemd is frozen".

Either you've added a 'd' or the OP has edited the text you quoted after you copied/quoted it. Not sure which since the post has been edited though the time means it might have been earlier than your post... or not...

Anyway, I think this is the source of confusion on all sides?

modInfo · 2013-08-15 22:16:29

nomorewindows wrote:

Those are signal lines.

When connecting pin 2 and 3 of gnd laptop starts without cable

schmidtbag · 2013-08-16 02:49:53

modInfo wrote:

nomorewindows wrote:
Those are signal lines.
When connecting pin 2 and 3 of gnd laptop starts without cable

Right, this is where I get the impression the USB ports are physically damaged. 2 and 3 are signal pins. I don't remember the pinout order of USB off the top of my head, but if at least 2 of your USB wires are shifted to the next pin over, what's preventing the 5v pin from breaching into one of the data pins? Shorting out the 5v pin can cause some damage.

nomorewindows · 2013-08-16 16:30:13

Maybe I'm thinking of Knoppix here, but isn't there a kernel command line option to disable usb?

WonderWoofy · 2013-08-16 17:23:01

cfr wrote:

WonderWoofy wrote:
I don't understand how this is "not a problem with the system" when in the same post you say that this occurs in a booted system as well as from the bios and trying the switch the screen ouput "does not help, because the systemd is frozen".
Either you've added a 'd' or the OP has edited the text you quoted after you copied/quoted it

No that is indeed a typo. After switching to and trying to learn about systemd, I have a nasty habit of automatially tacking that 'd' on to the end of 'system' any time I try to type it.

Arch Linux

#1 2013-08-13 16:33:22

How to turn on a laptop without a USB cable and VGA?

#2 2013-08-13 19:36:23

Re: How to turn on a laptop without a USB cable and VGA?

#3 2013-08-13 19:41:27

Re: How to turn on a laptop without a USB cable and VGA?

#4 2013-08-13 19:44:22

Re: How to turn on a laptop without a USB cable and VGA?

#5 2013-08-13 19:57:05

Re: How to turn on a laptop without a USB cable and VGA?

#6 2013-08-13 20:05:33

Re: How to turn on a laptop without a USB cable and VGA?

#7 2013-08-14 18:11:35

Re: How to turn on a laptop without a USB cable and VGA?

#8 2013-08-14 18:20:59

Re: How to turn on a laptop without a USB cable and VGA?

#9 2013-08-14 23:38:31

Re: How to turn on a laptop without a USB cable and VGA?

#10 2013-08-15 00:00:33

Re: How to turn on a laptop without a USB cable and VGA?

#11 2013-08-15 03:39:48

Re: How to turn on a laptop without a USB cable and VGA?

#12 2013-08-15 15:04:32

Re: How to turn on a laptop without a USB cable and VGA?

#13 2013-08-15 20:54:17

Re: How to turn on a laptop without a USB cable and VGA?

#14 2013-08-15 21:39:53

Re: How to turn on a laptop without a USB cable and VGA?

#15 2013-08-15 21:47:35

Re: How to turn on a laptop without a USB cable and VGA?

#16 2013-08-15 22:16:29

Re: How to turn on a laptop without a USB cable and VGA?

#17 2013-08-16 02:49:53

Re: How to turn on a laptop without a USB cable and VGA?

#18 2013-08-16 16:30:13

Re: How to turn on a laptop without a USB cable and VGA?

#19 2013-08-16 17:23:01

Re: How to turn on a laptop without a USB cable and VGA?

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