I was previously using a version of the IOT (non gui image) which was able to give me a command line interface. (see: https://groups.google.com/forum/#!category-topic/beagleboard/beaglebone-black/3Ffp74qhveQ). I’ve installed the latest version of Debian LXQT (9.4) from the official website, loaded it onto a microSD card and now booted it (with SD card in and the LCD screen attached). The output on the screen is now a backlit black screen. The LCD’s onboard LEDs (power and user) are a solid green ‘on’ and the beagle itself has its heartbeat LED pulse. There is no linux logo or any type of interface, only backlight. Same results using a 5VDC Jack. A picture is attached.
With the screen disconnected, I am still able to use PuTTY to connect to the beagle and display the current image (pic attached).
Do you have any idea what’s happening?
please save me.
(through putty, without LCD)
Your old version of u-boot in the eMMC is blocking overlays from
sudo dd if=/dev/zero of=/dev/mmcblk1 bs=1M count=10
Then u-boot will auto-detect the LCD and pass the proper overlay to
the kernel. You should see the LCD come up early with a linux mascot
It works now!!!
Words cannot express my gratitude. Thank you thank you thank you for the help. Keep up the good work.
All the best,
Just for information …
What does the date/version of the bootloader in the eMMC need to be (or later than) so that this does not happen?
Well, our patched u-boot: 2018.03
Which currently detects this list of LCD's and will correctly pass the
correct overlay to the kernel..
If i'm missing one, either i don't have it or, something...
Soon we will transition to 2018.07 to get the spectre/meltdown fixes,
but overlay support is the same as 2018.03.
(dealing with one odd bug in 2018.07)