DP MST issue

About ORIN using DP to display dual screens.
4k+4K not ok
4k + 2560x1440 ok
Do you have any suggestions ??

As show bellow

ORIN DP → Dell U2723QE
4k60p ok

ORIN DP → Samsung S27A700NWC
4k60p ok

ORIN DP → Dell U2723QE → Samsung S27A700NWC
Dell U2723QE 4k60p ok Samsung S27A700NWC 4k60p not ok
Dell U2723QE 4k30p ok Samsung S27A700NWC 4k30p not ok
Dell U2723QE 4k60p ok Samsung S27A700NWC 2560x1440 ok

Do you have any suggestions ??

What is the result of xrandr in the error case?

Dell U2723QE 4k30p ok Samsung S27A700NWC 4k30p not ok
unable to display

It is suspected that it is a cable problem. I have purchased 8K cables and retested.

1 Like

I switched to 8K cable connection

but still only
Dell U2723QE 4k30p ok Samsung S27A700NWC 2560x1440

if set to
Dell U2723QE 4k30p ok Samsung S27A700NWC 4k30p is not ok
Samsung S27A700NWC show no signal …
( ORIN directly connected to Samsung S27A700NWC can display 4k30p )

kernel message …
root@ubuntu:/home/uuser# dmesg
[ 875.337535] NVRM nvAssertFailedNoLog: Assertion failed: minRequiredIsoBandwidthKBPS <= clientBwValues[DISPLAY_ICC_BW_CLIENT_EXT].minRequiredIsoBandwidthKBPS @ kern_disp_0402.c:111

How to fix it ???

Hi,

Are you talking about

Dell U2723QE 4k30p + Samsung S27A700NWC 4k30p is NG

Dell U2723QE 4k30p ok Samsung S27A700NWC 2560x1440 → is OK

Did you test jp5.1?

yes

root@ubuntu:/etc# cat nv_tegra_release

R35 (release), REVISION: 2.1, GCID: 32413640, BOARD: t186ref, EABI: aarch64, DATE: Tue Jan 24 23:38:33 UTC 2023

root@ubuntu:/etc#

Do you have any suggestions?