E3950 DP port display OUTPUT is not right at ubuntu18.04

[denghf]

DP port of E3950 display output is not right at ubuntu18.04, the HDMI display output is right ; and the DP & HDMI is right at window; the Abnormal phenomenon is  that the Gray scale display of DP  port is not right；Corresponding brightness is maybe YUV 16-235 ,but not the sRGB 0-255 we need

[CarlosAM_INTEL]

Hello, @denghf:

Thank you for contacting Intel Embedded Community.

We want to address the following question to better understand the reported situation:

Could you please let us know if the design related to this situation has been developed by you or by a third-party company?

Could you please give us the information of the affected system (such as the manufacturer, part number, model, and where we can find its information)?

Could you please list the sources used to develop the affected system?

We are waiting for your clarification.

Best regards,

@CarlosAM_INTEL.

[denghf]

Hello, @CarlosAM_INTEL :

The CPU mode is designed by Advantech China, and the model is SOM-2569 (https://www.advantech.com.cn/products/f1cfcaf1-d1ac-44fe-99f6-a7142b2f46e7/som-2569/mod_ce2875fa-14da-45d9-839a-4851366be61c). We have tried the Ubuntu 18.04/20.04/21.10 (https://cn.ubuntu.com/download/desktop)

[CarlosAM_INTEL]

Hello, @denghf:

Thanks for your clarification.

Your questions related to the devices developed by the cited manufacturer should be addressed by filling out the form stated on the following website:

https://www.advantech.com.cn/contact/inquiryrequestform?subject=technical%2Bsupport

Best regards,

@CarlosAM_INTEL.