Refresh rate goes back to 60hz after each restart with ARC A770 16GB

[StarkX]

I noticed a recent problem, every time I restart my PC, the refresh rate of my monitor goes to 60hz, VRR is then greyed out too in Arc Control.

I have to completely turn off my monitor screen and turn it back on to get my refresh rate back to 240hz or completely turn off my PC and turn it back on.

My monitor is the LG 27GR95QE-B OLED Gaming Monitor plugged in with the original HDMI 2.1 cable. 

GPU ARC A770 16GB

[StarkX]

Hi,

I don't think I said that my a770 graphics card has two HDMI ports, it's my monitor that has two HDMI ports. I will try the HDR test later. Thanks.

[NormanS_Intel]

Hello StarkX,

Thank you for providing that clarification; it helps to clear up any misunderstanding. It's wonderful to know that you plan to perform an HDR test later on. If you need any assistance or have questions about setting it up, feel free to reach out. I'm here if you need any help. 

Best regards,

Norman S.

Intel Customer Support Engineer

[StarkX]

Apparently when I disable Variable Refresh Rate on my monitor I no longer have this problem via the HDMI port after a restart. But it works perfectly via the Display Port.

I just realized that my monitor does not indicate VRR when I am connected to the Dispay Port, it is only available on the HDMI ports. Display port shows Adaptive Sync instead of VRR, or is it a same thing?

HDMI 2.1

Display Port

I don't know if this problem is related to ARC, in any case I didn't have this problem with my old AMD graphics card on the HDMI port

[NormanS_Intel]

Hello StarkX,

Thank you for your response and the information you provided. It seems like you've encountered a common confusion regarding display technologies. Adaptive Sync and Variable Refresh Rate (VRR) are indeed related concepts, but they are referred to differently depending on the connection type and standards.

Adaptive Sync is a term used by VESA (Video Electronics Standards Association) specifically for DisplayPort connections. 

On the other hand, VRR is a term often associated with HDMI, especially since the introduction of HDMI 2.1, which includes VRR as part of its specification. VRR over HDMI functions similarly to Adaptive Sync, aiming to provide a smooth visual experience by matching the display's refresh rate with the output of the GPU.

So, when you're connected via DisplayPort, your monitor indicates Adaptive Sync, which is essentially the same functionality as VRR indicated when connected via HDMI. The different naming conventions can be attributed to the different standards and protocols used by DisplayPort and HDMI

In summary, while the terms may differ, the underlying technology serves the same purpose. Furthermore, it seems we have identified the underlying cause of the issue at hand. I plan to engage in detailed discussions with our internal team to explore this further. Following our deliberations, I will ensure to provide a comprehensive update in this thread at the earliest opportunity.

Best regards,

Norman S.

Intel Customer Support Engineer

[NormanS_Intel]

Hello StarkX,

Upon reviewing the situation, we would like to convey that the matter at hand pertains to a compatibility concern. The Arc A-Series GPUs are designed to officially support Variable Refresh Rate (VRR) exclusively via VESA Adaptive Sync on HDMI 2.1 and DisplayPort 1.4 interfaces. When examining your display's specifications, we note that it accommodates VRR through AMD FreeSync™ Premium technology. While AMD FreeSync Premium does derive from VESA Adaptive Sync, it incorporates a distinct implementation that may lead to compatibility challenges, including those related to the LSPCON chip within the GPU that facilitates the DP to HDMI 2.1 conversion. Consequently, our best advice would be to utilize a DisplayPort 1.4 connection with your display, as opting for a different GPU is unlikely to resolve this issue.

Should you have any inquiries or require further assistance, please feel free to reach out to us. We're here to help! 

Best regards,

Norman S.

Intel Customer Support Engineer

[NormanS_Intel]

Hello StarkX,

I wanted to check if you had the chance to review the information I posted. If there are any questions or additional support needed, don't hesitate to reach out. 

Best regards,

Norman S.

Intel Customer Support Engineer

[NormanS_Intel]

Hello StarkX, 

I have not heard back from you so I will close this inquiry now. If you need further assistance, please submit a new question as this thread will no longer be monitored.

Best regards,

Norman S.

Intel Customer Support Engineer