Jetpack 4.4 Gnome Wayland Desktop Shell issue

Autonomous Machines Jetson & Embedded Systems Jetson Xavier NX
1

Hi all,

We can’t launch Gnome Wayland Desktop Shell successfully in Jetpack 4.4, but it works well in Jetpack 4.2.1. Is it a known issue or we did something wrong? Please help us.

Many thanks.
B.R.
Roland

3

Hi,
We have steps to stop display manager and start Weston compositor in
https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%2520Linux%2520Driver%2520Package%2520Development%2520Guide%2Faccelerated_gstreamer.html%23wwpID0E0JP0HA
Please take a look and give it a try.

4

Hi DaneLLL,

First of all, I’m sorry that this article should be posted on Xavier NX category. Should I re-post on NX category?

We used L4T Sample Root File System to install all the nvidia-l4t和nvidia-jetpack deb package, and follow the Developer Guide to enable Weston. But it still can’t work.
The error message is for your information. Please help us.

[11:00:22.640] weston 6.0.1
[http://wayland.freedesktop.org](http://wayland.freedesktop.org/)
Bug reports to: [https://bugs.freedesktop.org/enter_bug.cgi? 
product=Wayland&component=weston&version=3.0.0] 
(https://bugs.freedesktop.org/enter_bug.cgi? 
product=Wayland&component=weston&version=3.0.0)
Build: unknown (not built from git or tarball)
[11:00:22.641] Command line: weston --idle-time=0
[11:00:22.641] OS: Linux, 4.9.140-tegra, #1 SMP PREEMPT Wed Apr 8 18:15:20 PDT 2020, 
 aarch64
 [11:00:22.641] Using config file '/etc/xdg/weston/weston.ini'
 [11:00:22.642] Output repaint window is 7 ms maximum.
 [11:00:22.642] Loading module '/usr/lib/aarch64-linux-gnu/weston//drm-backend.so'
 [11:00:22.646] initializing drm backend
 [11:00:22.648] using /dev/dri/card0
 [11:00:22.648] DRM: supports universal planes
 [11:00:22.648] DRM: supports atomic modesetting
 [11:00:22.648] DRM: does not support picture aspect ratio
 [11:00:22.648] Loading module '/usr/lib/aarch64-linux-gnu/weston//gl-renderer.so'
 MESA-LOADER: failed to open tegra-udrm (search paths /usr/lib/aarch64-linux- 
 gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
 failed to load driver: tegra-udrm
 MESA-LOADER: failed to open kms_swrast (search paths /usr/lib/aarch64-linux- 
 gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
 failed to load driver: kms_swrast
 MESA-LOADER: failed to open swrast (search paths /usr/lib/aarch64-linux- 
 gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
 failed to load swrast driver
 [11:00:22.672] Failed to load GBM.
 [11:00:22.675] falling back to internal swapchain
 MESA-LOADER: failed to open tegra-udrm (search paths /usr/lib/aarch64-linux- 
 gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
 failed to load driver: tegra-udrm
 MESA-LOADER: failed to open kms_swrast (search paths /usr/lib/aarch64-linux- 
 gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
 failed to load driver: kms_swrast
 MESA-LOADER: failed to open swrast (search paths /usr/lib/aarch64-linux- 
 gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
 failed to load swrast driver
 [11:00:22.720] Failed to load GBM.
 [11:00:22.723] failed to initialize egl
 [11:00:25.880] fatal: failed to create compositor backend
 [11:00:25.881] Internal warning: debug scope 'drm-backend' has not been destroyed.

Many thanks.
B.R.
Roland

5

Hi,
Do you mean the steps do not work on Xavier NX?

1.Stop the display manager:
$ sudo systemctl stop gdm 
$ sudo loginctl terminate-seat seat0 
2.For Weston 6.0 use tegra_drm driver
$ sudo modprobe tegra-udrm modeset=1
3.Unset the DISPLAY environment variable:
$ unset DISPLAY 
4.Create a temporary xdg directory:
$ mkdir /tmp/xdg 
$ chmod 700 /tmp/xdg 
5.Start the Weston compositor:
$ sudo XDG_RUNTIME_DIR=/tmp/xdg weston --idle-time=0 &
1 Like
6

Hi DaneLLL,

Yes, We followed the SOP step you mentioned, and got the error message for your reference.

Many thanks.
B.R.
Roland

7

Hi,

Could you share the result of command"lsmod"?

9

Hi Wayne,

Sure. Please help us check the output result.
Thank you very much.

//-----------------------------------------
hs@hs-nx:~$ lsmod
Module                  Size  Used by
zram                   26166  2
overlay                48691  0
spidev                 13282  0
nvgpu                1580098  3
bluedroid_pm           13912  0
ip_tables              19441  0
x_tables               28951  1 ip_tables
hs@hs-nx:~$

Many thanks.
B.R.
Roland

11

Looks like tegra_udrm failes to load up because of something wrong. We will help check.

12

Hi roland6001,

Please run

$sudo ln -sf /usr/lib/aarch64-linux-gnu/tegra/libnvgbm.so /usr/lib/aarch64-linux-gnu/libgbm.so.1

before
$ sudo modprobe tegra-udrm modeset=1

13

Hi Carolyuu,

Problem solved. Thank you so much.

Many thanks.
B.R.
Roland

1 Like