Samsung QS Lag Fix (UN1CA)

A minimal Xposed module to fix frame drops in the Quick Settings panel on Samsung devices running the UN1CA 3 ROM when music is playing.

The Issue

Samsung’s AudioVisSeekBar (QS Media Player’s progress bar) uses a wave animation. By default, on flagship OneUI port ROMs (like UN1CA) it renders with stepX = 2, which is an excessive high resolution that forces frequent and expensive path calculations. On midrange devices, this can result in up to 30% CPU usage increase by SystemUI, causing the panel to skip frames when expanding or interacting with the QS panel.

The Fix

This module hooks the constructor of MultiWaveAreaTrackRenderer and forces stepX to 10. This reduces the path complexity significantly with almost no visible impact on the animation quality, eliminating the Quick Settings stutter during music playback.

While 10 is a balanced sweet spot, values like 15 may provide slightly better performance on very low-end devices. However, anything past 20 results in visual diminishing returns and distorted waves with no measurable improvements to CPU usage.

Target

• Package: com.android.systemui
• Class: com.android.systemui.media.audiovisseekbar.renderer.track.auto.MultiWaveAreaTrackRenderer
• Parameter Modified: stepX (Int)

Installation

1. Install APK.
2. Enable in LSPosed/Xposed.
3. Select System UI scope.
4. Restart System UI or Reboot.

Links

• PayPal
• Revolut Tag @danielem47
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License

Apache License 2.0.

Attribution Requirement: As per the NOTICE file, any project that incorporates this specific stepX optimization must provide clear acknowledgement of this project as the original source of the tweak.