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Cubieboard2 no video ...anymore..


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I've build an SD card image with in a buildroot myself, used the stable branch as suggested. "For stable branch use --branch=v23.11"..and that all worked good so far.

I'm no linux guy at all and begun some investigations, installed packages and configured the system, this was an desktop variant with xfce.

Somewhere in the middle of work I've got the message that a security update is available and I should do an apt upgrade..done that.

Interresting for me was, that I've got an Update to Armbian 24.2.1 jammy.. ok ..then this is so.


I've noticed later that I don't have any video output from X11 anymore, after the login prompt the screen gets black with an cursor above left and later is shut off entirely,

but the Xserver is still running,


1125 tty7     Ssl+   0:06 /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/ru
n/lightdm/root/:0 -nolisten tcp vt7 -novtswitch 



xrandr output:



Screen 0: minimum 8 x 8, current 3840 x 1200, maximum 16384 x 16384
DVI-I-0 disconnected primary (normal left inverted right x axis y axis)
DVI-I-1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 518mm x 324mm
   1920x1200     59.95*+
   1920x1080     60.00    59.93  
   1680x1050     59.95  
   1600x1200     60.00  
   1440x900      74.98    59.89  
   1280x1024     75.02    72.00    60.02  
   1024x768      75.03    70.07    60.00  
   800x600       75.00    72.19    60.32  
   640x480       75.00    72.81    65.99    59.94  
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DVI-D-0 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 521mm x 293mm
   1920x1080     60.00*+  50.00  
   1680x1050     59.95  
   1600x900      60.00  
   1440x900      59.89  
   1280x1024     75.02    60.02  
   1280x800      59.81  
   1280x720      60.00    50.00  
   1152x864      75.00  
   1024x768      75.03    70.07    60.00  
   800x600       75.00    72.19    60.32    56.25  
   720x576       50.00  
   720x480       59.94  
   640x480       75.00    72.81    59.94  
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)


I've fiddeled around with some commands, but I'm unable to restore the Xserver Output on the DVI Output of the Cubieboard2. I have an DVI to VGA Connector plugged in and an TFT Display with the VGA Input to the converter. I'm unable to use the vga output that is provided at the DVK521 Board (WaveShare) too and already had planned to ask here how I can switch between the Video connectors with an actual Armbian.  The last thing I've done where some entries in the armbianEnv to get an 2nd uart and the 1wire Interface enabled, that worked so far, but I was logged in with ssh from my host and haven't seen the X-Display from the Cubieboard2 since the monitor was switched to DVI which is connected to the host as 2nd monitor. I don't think that there is something wrong:



overlays=uart3 w1-gpio                                                          



The commented out extraargs line was from Igor suggested in another thread for a problem w/o connected monitor..but changed nothing.


Can someone help me please?

I hadn't much todo with Xserver setup in the last years..I'm tapping around pretty much in the dark..


Kind Regards,


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Posted (edited)

134 views and no Idea? Should I reinstall the old image?





Ok.. forget about that above, it's simply the wrong xrandr output )false DISPLAY variable).

I can switch to HDMI1-1 and get a picture, but the default generated config for the Xserver seems to be wrong after the update..


One Question left: How can I switch the Video Output to VGA or HDMI or LCD on Armbian? Originally this was possible with a u-boot kernel Variable..but the original u-boot can't write to a fat partition..since there is none..?




Edited by holm
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