Portrait graphics slower than landscape

Autonomous Machines Jetson & Embedded Systems Jetson AGX Xavier
#1

Hi, When I configure xorg (or weston) for portrait display (rotation left or right) I notice that it is much more juddery than when in landscape. It does not maintain a smooth 60fps.

I have used HD videos (encoded @ 60) and displayed with gstreamer and also a very basic opengl program to test this. It is always butter smooth in landscape (HD or UHD) and juddery in portrait (HD or UHD).

Our application requires portrait, so … please help!

Thanks,

Robin Carlisle
Framestore

#2

Hi,
Please share steps of changing Ubuntu desktop to potrait mode and profiling fps. We can try to reproduce it and then do further check.

#3

Hi Framestore,

Have you managed to get issue resolved? If not, please share steps of changing Ubuntu desktop to potrait mode and profiling fps, then we can try to reproduce it.

#4

Hi, sorry for delay. I am off for xmas so cannot get repo steps until next year. Will update then.

Thanks

Robin
Framestore

#5

Hi,

I run X standalone (without GDM) using the service file attached.

I have also attached 2 xorg.conf files we use for 1080p60 landscape and portrait.

I have attached a test program binary (syncBars) which gives an easy visual indication of whether the graphics are smooth or not. It is a C++ program using OpenGL and glfw. I can provide source if you want to check it.

apt install libglfw3

When in landscape mode, run the syncBars application like this :-

DISPLAY=:0 syncBars 0 0 1920 1080 1 8 8

When in portrait mode, run the syncBars application like this :-

DISPLAY=:0 syncBars 0 0 1080 1920 1 8 8

You will be able to see that when X is in landscape mode, the test app runs buttery smooth. When in portrait mode it judders very obviously.
jetson_portrait_issues.zip (7.17 KB)

#6

Hi guys,

Were you able to repro at your end?

THanks,

Robin

#7

Hi,
We are checking it. Will update.

For more information, do you use r32.3.1 or r32.2.3?

#8

head -n 1 /etc/nv_tegra_release

R32 (release), REVISION: 2.3, GCID: 17644089, BOARD: t186ref, EABI: aarch64, DATE: Tue Nov 5 21:48:17 UTC 2019

Thanks,

Robin

#9

Did you guys manage to repro?

Thanks,

Robin

#10

Hi,
We can reproduce the issue. It is not default mode and we are checking if we can support it.

#11

Hi robin.carlisle,

Can you reproduce issue with weight glxgears app and heavy weight bubble app?
We tried these two app are working fine and smooth.

#12

Hi,

What is “heavy weight bubble app” ?

Robin

#13

Also, I can easily reproduce the juddering in portrait with glxgears. It judders roughly twice a second

glxgears -fullscreen
#14

Hi,
We porovide demo samples in each release. The bubble app is

/usr/src/nvidia/graphics_demos/bubble/

We don’t observe the issue in running the app. Please give it a try. Would be great if you can develop your usecase based on the demo apps.

#15

Hi,

I have tested.

The bubble app runs perfectly in landscape, but judders around once a second) in portrait. It is easily visible. The glxgears apps also suffers visibly in portrait.

#16

Hi robin.carlisle,

When you run bubble and glxgears apps, how do you set display in portrait mode?
Are you using System Settings -> Displays -> Rotation to change portrait mode?
Thanks!

#17

Hi, we use X directly without a window manager. Full instructions and config files further up in thread. Thanks

#18

Hi robin,

Are you able to see this issue with window manager?

#19

Hi,

I have never tested in window manager. I think to make sure I have a good test setup I will do a total reflash and start from scratch. Which version of L4T shall I go for? the latest one?

#20

Yes, please always test on latest one.
I remembered we once had an graphic related issue year ago which would only reproduce on X but when window manager is enabled, it is gone.