October 12, 2015 - London, UK

Running a Raspberry Pi with an HDMI adapter.

Well, that seems pretty trivial, right? You just connect the adapter and it should just work. Well, it should, but it doesn’t.

What in fact happens is that your adapter prevents your Pi from detecting that there is something connected to the HDMI output, so it doesn’t broadcast anything through there and all you will see is a black screen making you wonder whether your Pi is really working and whether you should have gone for that more expensive adapter since this one is not working. Good news for you, it is none of the two.

There is a simple fix for that. We just need to change the Pi’s “BIOS” configuration. Well, the Raspberry Pi in fact does not have a BIOS like other bigger computers do. It has a file called confix.txt which is read by the GPU before the ARM core is initialised. All we need to do is to go to that file and uncomment the line where it says hdmi_safe=1. To do that run:

sudo nano /boot/config.txt

Now look for the line where it says


and remove the # from the beginning of the sentence.

Now press Ctrl + X and then press y and then Enter. Now restart your Pi and enjoy!