Desktop GUI does not work with rebuild kernel image

Please provide the following info (check/uncheck the boxes after creating this topic):
Software Version
DRIVE OS Linux 5.2.6
DRIVE OS Linux 5.2.6 and DriveWorks 4.0
DRIVE OS Linux 5.2.0
DRIVE OS Linux 5.2.0 and DriveWorks 3.5
NVIDIA DRIVE™ Software 10.0 (Linux)
NVIDIA DRIVE™ Software 9.0 (Linux)
other DRIVE OS version
other

Target Operating System
Linux
QNX
other

Hardware Platform
NVIDIA DRIVE™ AGX Xavier DevKit (E3550)
NVIDIA DRIVE™ AGX Pegasus DevKit (E3550)
other

SDK Manager Version
1.7.1.8928
other

Host Machine Version
native Ubuntu 18.04
other

I rebuild the kernel, after the new image is flashed into Xavier, I follow the Dirve OS SDK instructions trying to enable desktop GUI,

sudo apt-get update
sudo apt-get install gdm3 ubuntu-unity-desktop

and modify custom.conf file, then reboot the system, but GUI does not work. I got below message:

[ OK ] Created slice User Slice of nvidia.
Starting User Manager for UID 1000…
[ OK ] Started Session 1 of user nvidia.
[ OK ] Started User Manager for UID 1000.
[ OK ] Started Wait for Network connected to WWW to be Configured…
[ OK ] Reached target Network is Online.
Starting startup for DUV3…
[ OK ] Started crash report submission daemon.
Starting Sync/Update RTC time…
[ OK ] Started startup for DUV3.
[ OK ] Created slice User Slice of gdm.
Starting User Manager for UID 120…
[ OK ] Started Session c1 of user gdm.
[ OK ] Started User Manager for UID 120.
Stopping User Manager for UID 1000…
[ OK ] Stopped User Manager for UID 1000.
[ OK ] Removed slice User Slice of nvidia.
Stopping User Manager for UID 120…
[ OK ] Stopped User Manager for UID 120.
[ OK ] Removed slice User Slice of gdm.
[ OK ] Created slice User Slice of gdm.
Starting User Manager for UID 120…
[ OK ] Started Session c2 of user gdm.
[ OK ] Started User Manager for UID 120.
Starting Daemon for power management…
[ OK ] Started Daemon for power management.
Stopping User Manager for UID 120…
[ OK ] Stopped User Manager for UID 120.
[ OK ] Removed slice User Slice of gdm.
[ OK ] Created slice User Slice of gdm.
Starting User Manager for UID 120…
[ OK ] Started Session c3 of user gdm.
[ OK ] Started User Manager for UID 120.
Stopping User Manager for UID 120…
[ OK ] Stopped User Manager for UID 120.
[ OK ] Removed slice User Slice of gdm.
[ OK ] Created slice User Slice of gdm.
Starting User Manager for UID 120…
[ OK ] Started Session c4 of user gdm.
[ OK ] Started User Manager for UID 120.
Stopping User Manager for UID 120…
[ OK ] Stopped User Manager for UID 120.
[ OK ] Removed slice User Slice of gdm.
[ OK ] Created slice User Slice of gdm.
Starting User Manager for UID 120…
[ OK ] Started Session c5 of user gdm.
[ OK ] Started User Manager for UID 120.
Stopping User Manager for UID 120…
[ OK ] Stopped User Manager for UID 120.
[ OK ] Removed slice User Slice of gdm.
[ OK ] Created slice User Slice of gdm.
Starting User Manager for UID 120…
[ OK ] Started Session c6 of user gdm.
[ OK ] Started User Manager for UID 120.

Did I miss something?

Thanks

Dear @user121210,
Could you confirm if you do not display issues before flashing new kernel image? Also, Could you check No screen visible after DRIVE AGX reflashing if it helps.

If I flash with original downloaded Image and zImage, the HDMI desktop works fine. But if I flash with rebuild Image and zImage, no HMDI signal, no display. I rebuild kernel from the downloaded source code without any change. I do try the lightdm setting, some thing, no display.
Is there any special configures?

Thanks

Dear @user121210,

I do try the lightdm setting, some thing, no display.

Could you choose gdm instead of lightdm. We notice for couple of customers using gdm has fixed display issue. Let us know if it helps?

I tried both, some issue.

Thanks

Dear @user121210,
Could you share the syslogs and boot log? Also, what is the status of display manager?