November-13th-2018, 08:43 AM
(This post was last modified: November-13th-2018, 08:45 AM by Armin@netPI.)
Well Dennis,
during the development of the netPI project we had indeed discussions about how to deal with all the original Raspberry Pi 3 options you usually configure in the /boot/config.txt file on an "open" SD card as described here.
This file can be compared to the BIOS you usually find installed on your PC. As you maybe know the Raspberry CPU is booted through its Graphics CPU and not through the main CPU. And this GPU is fed with a file named bootcode.bin that has to be located on the first partition of the SD card to be found during the boot sequence. Once the bootcode has been started it locates the config.txt file and starts to interpret the settings and make all adjustments accordingly.
In the list of the different options you find also those setting the screen resolution driven on the HDMI port. And now comes the problem ... on netPI you have no access to the config.txt file cause on netPI the SD card is not freely accessible due to security reasons. Bound to this fact we decided to configure the screen resolution in the config.txt file on netPI to auto detection mode which adjusts the screen resolution to the connected monitors maximum resolution possible. In your case it seems to be 1920X1080.
I have not found any possibility on the web to adjust the raspberries screen resolution to a specific value after it has booted. So I am sorry to say at the moment netPI drives the max resolution possible with your monitor and you have no possibility to change it, neither in config.txt nor in hdmi-container.
Thx
Armin
during the development of the netPI project we had indeed discussions about how to deal with all the original Raspberry Pi 3 options you usually configure in the /boot/config.txt file on an "open" SD card as described here.
This file can be compared to the BIOS you usually find installed on your PC. As you maybe know the Raspberry CPU is booted through its Graphics CPU and not through the main CPU. And this GPU is fed with a file named bootcode.bin that has to be located on the first partition of the SD card to be found during the boot sequence. Once the bootcode has been started it locates the config.txt file and starts to interpret the settings and make all adjustments accordingly.
In the list of the different options you find also those setting the screen resolution driven on the HDMI port. And now comes the problem ... on netPI you have no access to the config.txt file cause on netPI the SD card is not freely accessible due to security reasons. Bound to this fact we decided to configure the screen resolution in the config.txt file on netPI to auto detection mode which adjusts the screen resolution to the connected monitors maximum resolution possible. In your case it seems to be 1920X1080.
I have not found any possibility on the web to adjust the raspberries screen resolution to a specific value after it has booted. So I am sorry to say at the moment netPI drives the max resolution possible with your monitor and you have no possibility to change it, neither in config.txt nor in hdmi-container.
Thx
Armin
„You never fail until you stop trying.“, Albert Einstein (1879 - 1955)
