One of my "Pi-compatible" HDMI/VGA Adaptors doesn't work to my display.

I have 2 HDMI/VGA adaptors, both certified compatible with Raspberry Pi by their supplier, but only the second listed below works between my Pi and a Proview RV729/700P display.

I have used the parameter "hdmi_safe=1" in config.txt, but that is not sufficient with the first adaptor. Any ideas what other config parameters might need changing for this to work ?

This one displays nothing:

http://www.minifo.com/en/hdmi-to-vga-adapter.html

This one works fine, displaying 28 lines of 74 characters:

https://www.modmypi.com/pi-vew-raspberry-pi-hdmi-to-vga-converter

johnbeetem over 12 years ago

It seems that many HDMI -> VGA adapters require various config.txt settings. There's useful lore at the RasPi Hardware Wiki: http://elinux.org/RPi_VerifiedPeripherals#HDMI-.3EVGA_converter_boxes
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Former Member over 12 years ago

my config has only the following "active" lines in it (the rest are comented out) without the "hdmi_mode=16" i was only getting a blank screen on my monitor using a china made adaptor try the below config and see what happens.

framebuffer_width=1024
framebuffer_height=768
console-width=1024
console-height=768

# uncomment to force a specific HDMI mode (this will force VGA)
hdmi_group=1
hdmi_mode=16
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mgt6910 over 12 years ago in reply to Former Member

Many thanks for the advice; I would really like to make some progress with this( as opposed to recycling several
perfectly good VGA screens).
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mgt6910 over 12 years ago in reply to Former Member

I am having trouble with this. I would like to confirm the use of underscore after framebuffer and minus after console
(before I brick my configuration), but I can find no documentation of any options beginning with the keyword "console".
Is there a definitive description somewhere of all the options supported in config.txt ?

P.S. I've found references to the framebuffer options in http://elinux.org/RPi_config.txt.
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Former Member over 12 years ago in reply to mgt6910

my running config is has exactly those lines and yes its odd but thats how it looks in the config for my XBMC and raspbian sd cards
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mgt6910 over 12 years ago in reply to Former Member

Tests completed. The display shows a large alert box with the message "display mode not supported". It then functions just as it did with my previous config.txt, apart from the alert box hiding the central part of the screen. I guess that it is falling back to some default mode. This is with the "approved" Pi-View converter from Element14, no reason to try the doubtful converter after that result.
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Former Member over 12 years ago in reply to mgt6910

try reducing the resolution using the below

framebuffer_width=640
framebuffer_height=480
console-width=640
console-height=480

# uncomment to force a specific HDMI mode (this will force VGA)
hdmi_group=1
hdmi_mode=16
I suspect the monitor cant handle the higher resolutiions
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