Dear All. I've recently bougth a BBB and a touch display cape from NHD-7.0CTP-CAPE-N NHD-7.0CTP-CAPE-N [165mm x 119.21mm] - $93.00 : Newhaven Display International, Inc., High Quality Sta…
There is no way to make it works with the latest debian (9.4) Stretch LXQT image provided by beagleboard.org. It seems to be an U-boot issue but for Debian newcomers it is hard to manage this stuff..
We would appreciate suggestions.
Hello Manuel,
I have a 4D systems Cape (7"). I too have issues with the latest debian(9.4) image. I have been able to get my cape to work with "debian 9.3" but I have to have the HDMI plugged into an external monitor. If I plug the HDMI into a monitor (monitor on of off) the LCD cape back light illuminates and the desktop displays on the LCD cape.
When I have both the cape and HDMI cable plugged in, both displays function as desired with the exception of the resolution. I set uEnv.txt to run at 640x480@60 which is why the right side of the cape has a black bar (display "cut off").
Maybe you can try to get an HDMI cable and external monitor and at least prove that the display works and that it is just a configuration issue as I have.
I am still trying to wrap my head around how linux handles a few display items.
xorg.conf
modesettings
xrandr
etc......
I have been struggling with two issues all weekend:
1) why wont the debian 9.4 work with the 7" display for 4D systems (I have the one with headers which enable the beagle bone black to be directly mounted on the LCD panel)
2) why do I need the HDMI cable plugged in for the system to recognize that display/s are attached.
My assumptions for each topic:
1) for the versions 9.6 to 9.3, something changed in the device overlay and/or hardware for the 4D systems cape. I notice 4D systems now has a new model out of the 7" LCD.
2) I think the EDID might have something to do with why the cape will not work without an HDMI cable plugged into the Beaglebone black but this is just a theory.
The picture below is debian 9.3 w/ LXDE desktop version, 4D systems 7" LCD cape with an external monitor. (resolution is 640x480 @ 60)
Hello Manuel,
I have a 4D systems Cape (7"). I too have issues with the latest debian(9.4) image. I have been able to get my cape to work with "debian 9.3" but I have to have the HDMI plugged into an external monitor. If I plug the HDMI into a monitor (monitor on of off) the LCD cape back light illuminates and the desktop displays on the LCD cape.
When I have both the cape and HDMI cable plugged in, both displays function as desired with the exception of the resolution. I set uEnv.txt to run at 640x480@60 which is why the right side of the cape has a black bar (display "cut off").
Maybe you can try to get an HDMI cable and external monitor and at least prove that the display works and that it is just a configuration issue as I have.
I am still trying to wrap my head around how linux handles a few display items.
xorg.conf
modesettings
xrandr
etc......
I have been struggling with two issues all weekend:
1) why wont the debian 9.4 work with the 7" display for 4D systems (I have the one with headers which enable the beagle bone black to be directly mounted on the LCD panel)
2) why do I need the HDMI cable plugged in for the system to recognize that display/s are attached.
My assumptions for each topic:
1) for the versions 9.6 to 9.3, something changed in the device overlay and/or hardware for the 4D systems cape. I notice 4D systems now has a new model out of the 7" LCD.
2) I think the EDID might have something to do with why the cape will not work without an HDMI cable plugged into the Beaglebone black but this is just a theory.
The picture below is debian 9.3 w/ LXDE desktop version, 4D systems 7" LCD cape with an external monitor. (resolution is 640x480 @ 60)
