HDMI to VGA


28 posts   Page 1 of 2   1, 2
by gadgetmo » Thu May 03, 2012 4:19 pm
Just received my Raspberry Pi (yay!) and have got an old Dell monitor with a VGA port on it. Should I purchase an HDMI to VGA cable? Will it work?

Thanks,

Arthur
Posts: 1
Joined: Thu May 03, 2012 3:12 pm
by Joe Schmoe » Thu May 03, 2012 4:33 pm
Search the forum - it has been discussed many times (and "to death").

The short answer is that if at all possible, abandon the idea of using the VGA monitor.  That's old technology.

The mid-level answer is "You can do it, but it will cost more than the Pi" (only slightly exagerated).

The longer answers, I leave to others.
Never answer the question you are asked. Rather, answer the question you wish you had been asked.

- Robert S. McNamara - quoted in "Fog of War" -
Posts: 2799
Joined: Sun Jan 15, 2012 1:11 pm
by Phil Spiegel » Thu May 03, 2012 7:40 pm
Contrary to repeated comment in earlier threads; there ARE some economical HDMI to VGA adapter-'cables' available! Presumably powered off the HDMI voltages.

I've just received my  Neewer Black HDMI Input to VGA Adapter Converter For PC Laptop

Sold by: TCT ( seller profile ) ordered from Amazon, and, in the absence of my RPi, I've tested it with the hdmi output of a Philips Blue Ray player - and with the expected absence of sound 8-) it works into my TV's VGA input without a problem. (UK <16GBP)

For those wishing to spend more money, there are similar offerings from HP, at HP prices.

Note that a review, read before ordering, reminded one that  it is not changing resolution.

It's (presumably) simply D to A converting the HDMi signal, and providing trhe required answer-back to the source equipement.  I tried it with the Hdmi  outout set to 2 different resolutions, but admittedlyt didin't check for any reported resolution on the TV because that was having to rescale to 768 lines anyway (DLP rearProjector)
Posts: 209
Joined: Tue Jan 17, 2012 8:17 am
by Bluemerlin » Thu May 03, 2012 8:36 pm
Currently unavailable. :(
Posts: 57
Joined: Tue Dec 20, 2011 3:41 pm
by JeremyF » Thu May 03, 2012 10:07 pm
http://www.ebay.com/itm/1080P-.....0885651197

$17 / 14 pounds.

You'll also need a physical/passive adapter to go from HDMI type C to HDMI type A.

http://www.ebay.co.uk/itm/Gold.....2eb13eae13
{sig} Setup: Original version Raspberry Pi (B, rev1, 256MB), Dell 2001FP monitor (1600x1200), 8GB Class 4 SD Card with Raspbian and XBMC, DD-WRT wireless bridge
Posts: 516
Joined: Wed Jan 25, 2012 9:06 pm
by bwoodbury » Thu May 03, 2012 10:36 pm
The cable Phil referenced is available from Amazon at

http://www.amazon.com/Black-In.....038;sr=8-1
User avatar
Posts: 122
Joined: Fri Dec 23, 2011 2:49 pm
Location: Canal Flats Canada
by Uaneme » Sat May 05, 2012 2:13 pm
This one looks interesting. Though it is still under construction so it seems (the page changed several times today so I'm not sure that you will see what i saw)

https://sites.google.com/site/scidiy/pc-diy/hdmi-to-vga

It also links to http://www.linusakesson.net/ha.....rd/vga.php.
Posts: 8
Joined: Sun Apr 22, 2012 4:12 pm
by mahjongg » Sat May 05, 2012 10:57 pm
A user that tried one of the cheaper adapters similar to the ones considered here reports dissatisfaction with the result, see this thread:

http://www.raspberrypi.org/for.....-convertor
User avatar
Forum Moderator
Forum Moderator
Posts: 5752
Joined: Sun Mar 11, 2012 12:19 am
by Impulse405 » Sun May 06, 2012 3:04 am
I am wondering if a USB dvi video card would work. dvi has vga signals in it. Yes VGA is outdated. and unfortunately is still used by laptop manufactures.  This could work
Posts: 5
Joined: Thu Mar 22, 2012 5:00 pm
by mahjongg » Sun May 06, 2012 3:13 am
do you mean an USB device that contains the complete video logic of a system, discrete and apart from its own video logic. That will only work if there is an alternative video driver for the USB device, and as the GPU of the PI isn't used things like GPU accelerated video decoding and 3D support will not work. Also the USB speed will be a limiting factor.

A small addendum only DVI-A outputs VGA compatible (A for analog) signals, the DVI-D signals that are available from the HDMI port of the R-pi are digital (D for digital) and not suitable for a monitor that only supports VGA.
User avatar
Forum Moderator
Forum Moderator
Posts: 5752
Joined: Sun Mar 11, 2012 12:19 am
by Impulse405 » Sun May 06, 2012 3:23 am
Try something like this, with a large powered hub you could in theory do a very nice multi monitor setup

http://www.amazon.com/gp/produ.....agazine-20
Posts: 5
Joined: Thu Mar 22, 2012 5:00 pm
by Uaneme » Sun May 06, 2012 11:13 am
Mahjonng : yes, the cheap HDMI -> VGA converters don't seem to work though it looks like it should be possible to DIY a converter that actually will work and doesn't cost a leg.

I'm just wondering if THAT DIY project is going in the right direction.

If someone has a cheap and working HDMI to VGA converter (and low shipping price) then let us know.

Impulse 405 :  Have a look at this topic: http://www.raspberrypi.org/for.....38;ret=all

I hope someone is able to give it a try ASAP, I don't have mi Pi yet…

Don't expect high performance over USB, but at least you would be able to connect a VGA (or a display with DisplayLink USB)

I doubt if the Pi CPU is powerful enough for multi display,  though some kind of multi display time table system should be possible I guess.

THOUGH we need someone to test and see if it is already working on the Pi.

Can you imagine the power of such a display with a touchscreen???? :-D
Posts: 8
Joined: Sun Apr 22, 2012 4:12 pm
by emg » Sun May 06, 2012 2:58 pm
FYI - I have this: KanaaN HDMI to VGA Adapter Converter

and it seems to work well for standard PC monitor resolutions. I would not watch video with it but as the initial release was supposed to be aimed at 'developers' and the hacking community, it is perfect. I'm driving an old monitor at 1184x928 and the resolution is plenty good for coding and playing about.

Those who are looking for HDMI high quality resolutions should stick with...HDMI.
Posts: 88
Joined: Wed Jan 11, 2012 11:01 pm
by mahjongg » Sun May 06, 2012 3:28 pm
perhaps we could add something about reasonable priced and working HDMI to VGA converters in the Wiki, together with the other "working for R-PI" stuff like WiFi adapters and stuff. here:

http://elinux.org/RPi_Screens

Also, if we have conformation, we could edit the wiki to say there -are- cheaper adapters available, here:

http://elinux.org/RPi_Hardware.....up#Display

But note we must first be fairly certain that the stuff we recommend really works, so ideally a well known poster here should confirm it.
User avatar
Forum Moderator
Forum Moderator
Posts: 5752
Joined: Sun Mar 11, 2012 12:19 am
by Uaneme » Sun May 06, 2012 6:29 pm
@emg: thx, pitty that they only ship in the UK., hope i can find one of those

@mahjongg: yes a 'proven to work' list for this kind of peripherals would be helpful specially for people on a low budget, so they can look at forehand if their current owned stuff is able to interface with a Pi.
Posts: 8
Joined: Sun Apr 22, 2012 4:12 pm
by hexelpdkk » Sun May 06, 2012 8:06 pm
@emg: What settings are you using in config.txt? I have the same adapter, and I haven't managed to get better than 640x480, but only tried a few values.
User avatar
Posts: 128
Joined: Fri Feb 24, 2012 4:40 pm
by JeremyF » Sun May 06, 2012 8:09 pm
mahjongg: http://elinux.org/RPi_Verified.....y_adapters

I've been trying to make a list.
{sig} Setup: Original version Raspberry Pi (B, rev1, 256MB), Dell 2001FP monitor (1600x1200), 8GB Class 4 SD Card with Raspbian and XBMC, DD-WRT wireless bridge
Posts: 516
Joined: Wed Jan 25, 2012 9:06 pm
by Uaneme » Sun May 06, 2012 11:28 pm
@Jeremy great!  Could you please add as

13.5 USB -> VGA/DVI/UbiSync/DisplayLink

UbiSync aka DisplayLink devices are USB to VGA converters there are several display's fitted with this port.

Even when it would be definite not working.. then everone can find the answer and hopefully why.. then someone can look into it.

I don't know if the ARM kernel supports these and/or if it is even implemented in the various distro's.

Fed days ago i started this topic:

http://www.raspberrypi.org/for.....ue=UbiSync I hope someone is able to test it. I still don't have my peice of Pi. :-D
Posts: 8
Joined: Sun Apr 22, 2012 4:12 pm
by hexelpdkk » Mon May 07, 2012 6:30 am
Seem to have sorted out my issues with the Kanaan adapter (removing hdmi_mode from config.txt certainly helped) so have added it to the wiki page.
User avatar
Posts: 128
Joined: Fri Feb 24, 2012 4:40 pm
by emg » Mon May 07, 2012 8:37 am
hexelpdkk

No idea, whatever the default is. I've made no changes to config.txt...
Posts: 88
Joined: Wed Jan 11, 2012 11:01 pm
by emg » Mon May 07, 2012 8:48 am
Uaneme: Protip: google the ASIN: B007QT0NNW. It turns up this: KanaaN HDMI zu VGA Adapter on Amazon.de. Any use?
Posts: 88
Joined: Wed Jan 11, 2012 11:01 pm
by emg » Mon May 07, 2012 8:51 am
Also, direct from Leicke. They have a lots of interesting looking converters...
Posts: 88
Joined: Wed Jan 11, 2012 11:01 pm
by Uaneme » Tue May 08, 2012 11:11 am
Thx! Leicke is the better option, they accept iDeal and ship to .nl

Though the total price will be more then the Pi itself, so for now my hopes are still on  DisplayLink.
Posts: 8
Joined: Sun Apr 22, 2012 4:12 pm
by na1pir » Tue May 08, 2012 6:11 pm
This one works with my rpi: http://www.ebay.com.hk/itm/ws/.....0628153937

I think this two should work as well because it looks the same to me: http://dx.com/hdmi-male-to-vga.....0cm-119691

http://dx.com/hdmi-v1-4-male-t.....5cm-130458
Posts: 69
Joined: Fri Sep 02, 2011 4:43 pm
by penguintutor » Wed May 09, 2012 10:30 pm
I have one working which cost just over £15, but at the moment only running at 720p. The description on the website says it does work at 1080, but I don't believe that is the case.

The cable came from amazon.co.uk Neewer Black HDMI Input To VGA Adapter Converter For PC Laptop

Once connected you see the initial boot screen, but then it goes blank when it tries to run at 1080p. To get this to work you need to edit the config.txt file, or create if it doesn't already exist (/boot/config.txt on Linux - or just config.txt if you have the SD card in a Windows machine) and add the following entry:

hdmi_mode=4


This forces it into 720p60 mode.
User avatar
Posts: 338
Joined: Tue May 08, 2012 9:11 am
Location: UK