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DZuck1's avatar
DZuck1
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

DisplayPort Only Connects to Windows not Linux

Hi, I am trying to use the DisplayPort sample design on a Stratix 10 board. I have implemented the exact sample project from Intel with the Bitec daughter card but am seeing some issues. When I plu...
Deshi_Intel's avatar
Deshi_Intel
Icon for Regular Contributor rankRegular Contributor
6 years ago

Hi Daniel,

I presume your system setup is like below. Correct me if I am wrong

  • win/linux CPU -> DP Rx -> DP Tx -> monitor

Does connecting win CPU -> monitor directly (via DP cable) works ?

Do you have S10 GX dev kit board to try out to rule out potential board setup issue ?

Have you try different brand or shorter DP cable to check for potential signal integrity concern ?

Are you using below Stratix 10 Intel FPGA DisplayPort design example ?

I believe it's not about the OS difference issue but rather on the graphic card issue

  • I presume you are using different graphic card on Win and Linux machine ?
  • Have you compare the spec between these 2 graphic card to find out the difference that maybe the root cause
  • Have you try to play around with Nvidia graphic card setting to see if it helps ? (Like BPC setting, lower down video resolution, disable adaptive sync and etc)
  • Also do you really need HBR3 (8G datarate) for 4Kp60 resolution ? Can you try change DisplayPort IP to 4G datarate channel to see if works ?
  • If you are using DP example design, can you dump out the MSA log as per attached 4k support sample screenshot ?

Thanks.

Regards,

dlim

DZuck1's avatar
DZuck1
Icon for Occasional Contributor rankOccasional Contributor
6 years ago
Hi Dlim, I did not have access to the hardware today but will try to get the logs you are asking for tomorrow. As for the setup question. I am using a dual boot PC that boots both into Windows and Linux. The exact same graphics card, DisplayPort cable and Bitec RX port are being used for the test. The only variable here is the OS which is why I am confused why it doesn’t work. The hardware all works with Windows. I will also try to grab the AUX logs and send that to you if that is of any help. Thanks, Daniel