<div dir="ltr">Dear Ken,<div><br></div><div>I have gone through this situation several times, most of the cases i found the image is faulty (bit missing / burning error / SD card issue). I always like to have couple of extra adapter. In any urgent case they prove themselves worthless.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Mar 16, 2019 at 7:22 PM Pablo Sebastián Greco <<a href="mailto:pablo@fliagreco.com.ar">pablo@fliagreco.com.ar</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
El 15/3/19 a las 20:52, Gordan Bobic escribió:<br>
> Most of these adapters have various compatibility issues. I went <br>
> through about 4 before I found one that allowed my laptop to talk to <br>
> the monitor I wanted to attach to it. Some of the adapters worked on <br>
> one machine, but not on others, going to the same monitor. I don't <br>
> know what causes these sorts of compatibility issues but it's not <br>
> specific to the Pi, it happens all over the place on all sorts of <br>
> devices, both high end and low end.<br>
As Gordan said, compatibility will always be an issue, but if you want <br>
to continue playing with it, I'd start replacing the bootfiles (and <br>
maybe playing with config.txt, cmdline.txt)<br>
><br>
><br>
> On Fri, Mar 15, 2019 at 11:10 PM kht-lists <<a href="mailto:kht-lists@protonmail.ch" target="_blank">kht-lists@protonmail.ch</a> <br>
> <mailto:<a href="mailto:kht-lists@protonmail.ch" target="_blank">kht-lists@protonmail.ch</a>>> wrote:<br>
><br>
> I downloaded the referenced image a couple of days ago, burned it<br>
> to a 16 GB SD card and booted my Pi 3B+. Fantastic! The Pi was<br>
> connected with a HDMI to DVI cable to a Dell 19" monitor.<br>
><br>
> I received in the mail a couple of HDMI to VGA adapters. The $4<br>
> generic ones which are all over ebay. I have several which I have<br>
> purchased over the years and the generally work fine.<br>
> adapter.png<br>
><br>
> I decided to test the new adapters with the Pi. I connected one<br>
> to the Pi and to a VGA cable to the same monitor (which has two<br>
> inputs). I had NO video. No rainbow screen, no 4 raspberries<br>
> screen, not test. Same for the second adapter. I tested the<br>
> adapters on an Intel based PC. They worked fine. But it gets<br>
> stranger... I booted the same Pi, same new adapter, connected to<br>
> the same monitor from an Ubuntu SD card. The video was fine! And<br>
> stranger still... I tried 3 older adapters with the Pi, CentOS and<br>
> the same cable and monitor. The video was again fine!<br>
><br>
> These adapters have no manufacturer markings. They probably all<br>
> came from the same factory in China. Obviously something changed<br>
> in the devices and I do not expect to ever be able to figure that<br>
> out. However, something is also different in the video (driver I<br>
> guess?) signal from the Pi with CentOS vs. Ubuntu. Can someone<br>
> shed any light on this mystery?<br>
><br>
> TIA,<br>
><br>
> Ken<br>
><br>
><br>
><br>
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><br>
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</blockquote></div>