LMC 8.4 installs fine on Vivo phones, then refuses to open, crashes mid-shot, or gets silently killed in the background. FunTouch OS and OriginOS both manage apps more aggressively than stock Android, and that’s usually the real reason behind LMC 8.4 not working on Vivo.
Why Is LMC 8.4 Not Working on Vivo Phones?
“LMC 8.4 is not working on Vivo phones mainly because of five causes: FunTouch OS blocking background permissions, aggressive battery optimization killing the app, missing Camera2 API support, a corrupted install, or a config file built for the wrong phone model.”
Vivo’s FunTouch OS, and its newer OriginOS variant, apply some of the most aggressive background app management among Android skins, alongside Xiaomi’s MIUI and Oppo’s ColorOS, according to app-killing behavior comparisons on the “Don’t Kill My App” community database.
This matters because these restrictions target background processes broadly, not camera apps specifically, but LMC 8.4’s computational photography needs sustained background processing during multi-frame capture, making it more sensitive to being killed mid-shot.
The sections below walk through each cause, starting with FunTouch OS’s permission system, which explains the majority of reported Vivo issues.
Does FunTouch OS Block LMC 8.4 from Running Properly?
Yes, FunTouch OS can block LMC 8.4 from running properly by default, since it restricts background activity and auto-start permissions for apps not pre-installed by Vivo.
This isn’t unique to LMC 8.4 — FunTouch OS applies the same restrictions to most sideloaded apps, part of Vivo’s approach to managing battery life and background resource use system-wide.
The “Don’t Kill My App” project, which tracks OEM battery management aggressiveness, consistently ranks Vivo among the stricter manufacturers, alongside Xiaomi, Oppo, and Huawei.
How Do You Fix LMC 8.4 Not Opening on Vivo?
Go to Settings > Apps > LMC 8.4 > Permissions, and manually enable Camera, Storage, and Autostart permissions, since Vivo often disables autostart by default for sideloaded apps.
If the app still won’t open, clear its cache and app data under Settings > Apps > LMC 8.4 > Storage, then reopen it and grant permissions again from a clean state.
Restarting the phone after granting permissions occasionally resolves cases where the permission change didn’t fully apply without a fresh app launch.
How Do You Fix LMC 8.4 Crashing During Shooting on Vivo?
Disable FunTouch OS’s battery-saving mode while using LMC 8.4, since aggressive power management can throttle the processor mid-shot, causing a crash during Night Sight or HDR+ processing.
Go to Settings > Battery, and confirm High Performance mode or standard mode is active rather than Ultra Battery Saver, which restricts background processing precisely when LMC 8.4 needs it most.
If crashes persist specifically during Night Sight, reducing the frame count in Advanced Settings lowers memory pressure, similar to the fix for freezing on other budget-oriented Android skins.
How Do You Enable Camera2 API Support on Vivo?
Check your Vivo phone’s Camera2 API hardware level using a free probe app, since some Vivo models, particularly budget Y-series phones, only implement Level 2 support rather than the Level 3 LMC 8.4 expects.
Camera2 API support is a hardware and firmware combination Vivo controls, not something users can manually enable if it’s absent — this differs from the FunTouch OS permission issues, which are user-fixable.
Vivo’s V-series and X-series flagship phones more consistently offer full Level 3 support than the budget Y-series, similar to how other brands segment hardware capability by tier.
How Do You Stop Vivo’s Battery Optimization from Killing LMC 8.4?
Go to Settings > Battery > Background Power Consumption Management, find LMC 8.4, and set it to Allow rather than the default restricted setting.
This specific menu, unique to FunTouch OS and OriginOS, controls which apps Vivo permits to run background processes, and it’s separate from the general Android battery optimization settings.
Without this specific permission granted, Vivo’s system can silently terminate LMC 8.4’s background processing mid-shot, which shows up as an unexpected crash rather than a clear error message.
Does Vivo’s App Store Block Sideloaded Apps Like LMC 8.4?
No, Vivo’s own app store doesn’t block sideloaded APKs directly, but FunTouch OS does show extra security warnings when installing apps from outside the store.
These warnings are part of Android’s standard Install Unknown Apps permission system rather than a Vivo-specific block, so approving them the same way as on any other Android phone completes the install normally.
Once installed, the app runs independently of Vivo’s app store, though the background permission restrictions covered above still apply regardless of installation source.
What Should You Do If LMC 8.4 Still Won’t Work on Vivo?
If LMC 8.4 still won’t work after granting all permissions and disabling battery restrictions, confirm your specific Vivo model’s Camera2 API level, since hardware limitations can’t be fixed through settings.
On confirmed Level 2 hardware, switching to Open Camera, which has lighter hardware requirements, often provides a more reliable experience than continuing to troubleshoot LMC 8.4 on unsupported hardware.
If your phone does support Level 3 but problems persist, reinstalling LMC 8.4 fresh after fully uninstalling the previous version resolves most remaining software-level issues.
Conclusion
LMC 8.4 not working on Vivo phones almost always traces back to FunTouch OS’s aggressive background permission and battery management system rather than the app itself. Manually enabling Autostart, Background Power Consumption, and confirming Camera2 API support resolves the majority of cases we’ve seen reported. For more setup guides and downloads, visit the LMC Camera homepage.
Why does LMC 8.4 close itself in the background on Vivo phones?
This happens because FunTouch OS’s Background Power Consumption Management setting restricts most sideloaded apps by default, killing background processes to save battery. Setting LMC 8.4 to Allow under Settings > Battery > Background Power Consumption Management resolves this in most cases. Without this permission, the system can terminate the app mid-shot without any clear error message.
Is LMC 8.4 compatible with all Vivo phone models?
No, compatibility depends on each specific model’s Camera2 API hardware level, which varies between Vivo’s budget Y-series and its higher-tier V-series and X-series phones. Flagship models more consistently offer full Level 3 support than entry-level devices. Checking your exact model with a Camera2 API probe app before troubleshooting further saves time.
Does OriginOS have the same restrictions as FunTouch OS?
Yes, OriginOS, Vivo’s newer Android skin used on some recent models, carries over similar background app management and battery optimization behavior from FunTouch OS. The same fixes — enabling Autostart and Background Power Consumption permissions — apply to both skins. The exact menu wording may differ slightly depending on your OriginOS version.
Will disabling battery optimization hurt my Vivo phone’s battery life?
The impact is minor and limited to LMC 8.4 specifically, since you’re only exempting one app from background restrictions rather than disabling battery optimization system-wide. Most users don’t notice a meaningful difference in overall battery life from exempting a single camera app. The tradeoff is worth it for reliable camera app performance.
Can I fix LMC 8.4 crashes on Vivo without rooting the phone?
Yes, all the fixes covered here — permissions, battery settings, cache clearing, and reinstalling — work on a standard, non-rooted Vivo phone. Rooting isn’t necessary or recommended just to fix LMC 8.4 compatibility issues. The FunTouch OS settings that cause most problems are accessible through the standard Settings app.
Why does LMC 8.4 work fine at first but stop working after a few days on Vivo?
This delayed failure pattern usually means FunTouch OS’s battery optimization re-applied restrictions after a system update or automatic cleanup process reset your permission settings. Re-checking Autostart and Background Power Consumption Management periodically catches this before it becomes a persistent problem. Some users report this happening after every major FunTouch OS update specifically.