‎External display problem screen mirroring hdmi

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shivamPandey9340

Active Level 3

last edited

07-19-2026 08:14 PM

in

When I connect my Samsung S25 Ultra to a 120Hz-capable capture card via an HDMI cable, the phone's refresh rate gets stuck at 60Hz as soon as the external display is detected. Why is this happening, and what is the solution?

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PankajBharadwaj
Active Level 10
07-20-2026 04:32 AM

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Samsung DeX
Check HDMI Cable if it's HDMI 2.2/2.1 or not.

HDMI 2.0 is locked at 4K@60Hz.
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shivamPandey9340
Active Level 3
07-20-2026 05:52 PM

in

Samsung DeX
Have you practically checked on the S25 Ultra when screen mirroring through HDMI 2.1 or 2.2? Regardless of the output resolution (even if it is 1080p), what is the FPS of the phone's own screen? Does it give 120 FPS? Does the S25 Ultra's screen maintain 120Hz, or does it get stuck at 60Hz? Please tell me🙏
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cs_member10
Moderator
07-20-2026 02:38 PM

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Samsung DeX
Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your query, we request you kindly share the log file. Also, share video clips and images for better understanding. This will help us to investigate further and resolve this issue.

Samsung Members Application (Open Samsung Members Application > Support> Tap on send feedback> Choose Composer> Select error report> select the appropriate issue category> Type your query and send.)

Note: To ensure relevant log information is included in the error report, submit the report within 3 minutes of encountering the bug or error, and do not terminate (swipe away) the Samsung Members application until you are notified that the report has been sent. This can take up to 5 minutes.

Warm Regards,
Samsung Customer Support
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ArpanChandra
Active Level 3
09-28-2026 09:08 PM

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Samsung DeX
Facing same problem, both in screen mirroring and samsung dex mode and in both wired and wireless mode. As soon as I share screen to external display, it stucks to 60hz. I can confirm it is not a OneUI problem, it is android problem. I also tested wired external display output via HDMI in Xiaomi 15 and OnePlus 12, both showing same problem in Android 16. I downgraded and flashed Xiaomi 15 to android 15, the 60hz problem solved instantly and gives 120hz on both mobile screen as well as in my capture card.
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External display problem screen mirroring hdmi

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