rasperilice15
Posts: 1
Joined: Sun May 08, 2016 3:41 pm

How to edit config.txt while using hdmi to vga converter?

Sun May 08, 2016 3:52 pm

Hi guys,

I have a raspberry pi 3 and installed the latest version of windows 10 iot core on a micro sd card by following the steps on Micrsoft's web site. I'm using a vga monitor and have an hdmi to vga converter to connect my raspberry pi 3. At first, I couldn't get any image on screen. After a quick web search, I found out that I should edit the config.txt to get any image. I tried a few suggestion on the web, but couldn't achieve it.

Below is what is written in my config.txt. Where and what exactly should I change or add?

Code: Select all

gpu_mem=32                  # set ARM to 480Mb DRAM, VC to 32Mb DRAM
framebuffer_ignore_alpha=1  # Ignore the alpha channel for Windows.
framebuffer_swap=1          # Set the frame buffer to be Windows BGR compatible.
disable_overscan=1          # Disable overscan
init_uart_clock=16000000    # Set UART clock to 16Mhz
hdmi_group=2                # Use VESA Display Mode Timing over CEA
arm_freq=900
arm_freq_min=900
force_turbo=1
PS: I found similar topics on this forum, but they couldn't solve my problem, because they are offering changing or uncommenting some lines which are not included in my config file as seen above.

User avatar
Dis93
Posts: 132
Joined: Thu Apr 07, 2016 8:30 pm
Location: Wuthering, Yorkshire

Re: How to edit config.txt while using hdmi to vga converter

Sun May 08, 2016 4:06 pm

What resolution is your monitor?
I'm using a 1920x1080 monitor with a HDMI to DVI convertor and had to add
hdmi_mode=82
hdmi_drive=1
to get the correct resolution. The mode number will be different for you if you have a different resolution.
Last edited by Dis93 on Sun May 08, 2016 4:19 pm, edited 2 times in total.


mikerr
Posts: 2825
Joined: Thu Jan 12, 2012 12:46 pm
Location: UK
Contact: Website

Re: How to edit config.txt while using hdmi to vga converter

Sun May 08, 2016 4:37 pm

I'd start with

Code: Select all

hdmi_safe=1
in there. If that works, you can then find individual settings.

Your HDMI VGA convertor may be stopping the pi from detecting HDMI, and so turning it off, try:

Code: Select all

hdmi_force_hotplug=1
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