How to Wipe Cache Partition on Xiaomi Phone to Fix Lag

The “System UI has stopped” error on Xiaomi HyperOS is usually fixed by restarting the phone, clearing data for System UI-related apps, removing a bad theme or widget, and installing pending system updates. If the system ui crash hyperos issue started after an update, Safe mode checks whether a third-party app is causing the crash.

Steps

Restart the device and check for pending updates.

A temporary HyperOS process failure can trigger system ui stopped xiaomi errors. Install all available HyperOS, Security, and system app updates before trying deeper fixes.
Clear cache and data for System Launcher and Themes.

Open Settings, find Apps, then clear cache for System Launcher, Themes, and Wallpaper Carousel if installed. If the error continues, clear app data for Launcher and Themes, then reapply the default theme.
Remove recent widgets, icon packs, or themes.

A broken widget or incompatible theme often causes fix systemui xiaomi searches after an update. Switch to the default theme, remove newly added widgets, and disable third-party launchers.
Boot into Safe mode and test stability.

Safe mode disables downloaded apps. If the crash stops in Safe mode, uninstall recently added apps, especially cleaner apps, overlay tools, or lock screen customization apps.
Reset app preferences or perform a factory reset if needed.

Resetting app preferences can restore disabled system components. If System UI keeps crashing even in Safe mode, back up data and use a factory reset as the final software step.

Common Issues and Fixes

Issue	Likely Cause	Fix
Error appears after a HyperOS update	Corrupted launcher or theme cache	Clear Launcher and Themes cache, then reboot.
Status bar or recent apps keep crashing	Theme engine conflict	Switch to the default theme and remove custom fonts or icon packs.
Crash starts after installing a utility app	Overlay or permission conflict	Uninstall cleaner, booster, floating window, or lock screen apps.
Home screen loads slowly, then System UI stops	Broken widget or launcher data	Remove recent widgets and clear Launcher data.
Crash continues in Safe mode	System-level corruption	Install the latest patch or factory reset after backup.

Quick Tips

Free up storage: Low free storage can cause random UI crashes. Keep several GB free before major updates.
Expect layout reset: Clearing Launcher data may reset home screen layout and folders.
Use Safe mode if boot loops happen: If the phone reboots repeatedly before the home screen appears, Safe mode may be the only workable test.
Know the reset limitation: A factory reset will not help if the issue is caused by faulty hardware, though hardware faults are less common than software conflicts.

🤔Note:

If the System UI crash started right after a HyperOS update, begin with Launcher, Themes, and widget-related fixes before trying a factory reset, because theme and launcher conflicts are a common cause.

Can a theme cause System UI to crash on Xiaomi HyperOS?

Yes. Custom themes, fonts, icon packs, and lock screen effects are common triggers for a system ui crash hyperos problem after updates.

Does Safe mode help with “System UI has stopped” on Xiaomi?

Yes. Safe mode is useful for checking whether a downloaded app is causing the system ui stopped xiaomi error. If the crash disappears there, the cause is usually not the core system.

💡Protip:

Before a factory reset, a phone management tool such as Dr.Fone can help export photos, videos, and other files so important data is not lost during troubleshooting.

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