Monitor connection issues
Posted: Sun Mar 06, 2022 8:20 am
Hi!
I'm having quite some trouble getting my monitor to work with the buildbotics controller.
I have tried just about every combination of settings in the boot/config.txt file as suggested by several forums. For instance here: https://forums.raspberrypi.com/viewtopic.php?t=166650. And here is the link to the official documentation: https://www.raspberrypi.com/documentati ... g_txt.html.
The backstory/what I've tried:
My monitor is a fairly old BenQ GL2250 with inputs for only DVI and VGA. Therefore, I first tried to use a short HDMI to DVI adapter with a DVI to DVI cable going to the monitor. I could only get this working with "hdmi_safe=1" in the config.txt-file, but this made the display only show 640*480 px in a weird format, but I couldn't get it working with any other setting than just pure safe-mode, not even setting the exact same settings as hdmi_safe=1 means, parameter by parameter (see documentation for details). "Not working" being the monitor remains blank and says "no input".
Moving on, I tried to fix it with buying a HDMI to DVI cable instead. This worked partially yesterday (full 1080p resolution except for a dark region on the left hand side). So I tried to change the overscan parameters in the config.txt-file to combat this, but after changing this, at some point, the monitor wouldn't work again.
So, after that I tried changing a bunch of parameters again to no luck and even switched back to the DVI-DVI cable with the adapter, but to no luck (not even with hdmi_safe=1).
I've tried the monitor with my laptop and the DVI to HDMI cable and it works just fine.
So status quo is that the video output never works now.
This has been super frustrating and I feel like I've tried every trick in the book, but if someone has any tips on what to try next, that would be great.
Could it be a hardware issue? (I have triple checked all the connections)
All help is very much appreciated,
Adrian
I'm having quite some trouble getting my monitor to work with the buildbotics controller.
I have tried just about every combination of settings in the boot/config.txt file as suggested by several forums. For instance here: https://forums.raspberrypi.com/viewtopic.php?t=166650. And here is the link to the official documentation: https://www.raspberrypi.com/documentati ... g_txt.html.
The backstory/what I've tried:
My monitor is a fairly old BenQ GL2250 with inputs for only DVI and VGA. Therefore, I first tried to use a short HDMI to DVI adapter with a DVI to DVI cable going to the monitor. I could only get this working with "hdmi_safe=1" in the config.txt-file, but this made the display only show 640*480 px in a weird format, but I couldn't get it working with any other setting than just pure safe-mode, not even setting the exact same settings as hdmi_safe=1 means, parameter by parameter (see documentation for details). "Not working" being the monitor remains blank and says "no input".
Moving on, I tried to fix it with buying a HDMI to DVI cable instead. This worked partially yesterday (full 1080p resolution except for a dark region on the left hand side). So I tried to change the overscan parameters in the config.txt-file to combat this, but after changing this, at some point, the monitor wouldn't work again.
So, after that I tried changing a bunch of parameters again to no luck and even switched back to the DVI-DVI cable with the adapter, but to no luck (not even with hdmi_safe=1).
I've tried the monitor with my laptop and the DVI to HDMI cable and it works just fine.
So status quo is that the video output never works now.
This has been super frustrating and I feel like I've tried every trick in the book, but if someone has any tips on what to try next, that would be great.
Could it be a hardware issue? (I have triple checked all the connections)
All help is very much appreciated,
Adrian