Ubuntu 18.04 GUI on TE0803 Issues

[ian]

Hello,

I'm currently working with the TE0803-03 on the TEBF0808-04A dev board and am running into issues running Ubuntu 18.04 Desktop.

I've followed the instructions listed here: https://wiki.trenz-electronic.de/display/PD/TE0803+SK+Demo1

But I've hit the following snags:

1) Running the mkubuntu_BionicBeaver.sh script gives me an SD card that ends in "Kernel panic" when booting, so I manually partitioned the SD card and followed the install instructions in that script. When I first booted, my displayport monitor shows a blank screen but I'm able to connect via serial.
2) ran "sudo systemctl set-default multi-user" to boot into the terminal, which works
3) running "startx" ends in error - "xinit: connection to X server lost". Posting the log file contents in the next comment.


I'm not sure where I'm going wrong and would greatly appreciate any help or guidance.

Warm regards,
Ian

[mch]

Hi Ian,

Please send for me the full item name of your TE0803 module. I would test the following instruction in Linux consul  to change the display manager:
dpkg-reconfigure lightdm

If lightdm package is already installed , you can test the following instruction to change the display manager :
dpkg-reconfigure lxdm

After changing the display manager , please reset the board and run startx instruction again.

Best regards,

Mohsen

[ian]

Hi Mohsen,

Thank you for the reply! The full item name is TE0803-03-3BE11-A

I tried both commands you suggested and got the same behavior:

'startx' brings up a black screen.

error messages in the log file for dpkg-reconfigure lxdm:

...
[   131.193]    ABI class: X.Org ANSI C Emulation, version 0.4
[   131.219] (==) FBDEV(0): Backing store enabled
[   131.219] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.219] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.219] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.219] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.219] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.219] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.219] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.219] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
...
[   131.221] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.221] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.221] (EE) FBDEV(0): FBIOPUTCMAP: Device or resource busy
[   131.221] (==) FBDEV(0): DPMS enabled                                                                                                                                                                           
[   131.221] (==) RandR enabled                                                                                                                                                                                   
[   131.235] (II) SELinux: Disabled on system                                                                                                                                                                     
[   131.237] (II) AIGLX: Screen 0 is not DRI2 capable                                                                                                                                                             
[   131.237] (EE) AIGLX: reverting to software rendering                                                                                                                                                           
[   131.308] (II) IGLX: enabled GLX_MESA_copy_sub_buffer                                                                                                                                                           
[   131.313] (II) IGLX: Loaded and initialized swrast                                                                                                                                                             
[   131.313] (II) GLX: Initialized DRISWRAST GL provider for screen 0
[   131.620] (II) config/udev: Adding input device Logitech USB Receiver (/dev/input/event0)
...
..

[mch]

Hi Ian,

have you already tested our prebuilt image file? Does it work?  If not , please test our prebuilt image file and let me to know if it works. You can download the prebuilt image file in the following link:

https://shop.trenz-electronic.de/de/Download/?path=Trenz_Electronic/Modules_and_Module_Carriers/5.2x7.6/TE0803/Reference_Design/2019.2/SK%20DEMO1

Best regards,

Mohsen