Start Larix Broadcaster and confirm that it is streaming while your Vivo phone is unlocked; lock the screen only after you can see that the stream is live. Larix supports Android background streaming by default, so if the stream stops after locking, check whether battery restrictions or background permissions are stopping it rather than assuming screen lock is unsupported.
The exact settings depend on your Vivo model and software version. Change one setting at a time, then test again: that makes it easier to identify whether the cause is an app permission, device power management, mobile signal or battery capacity.
Confirm the stream while the phone is unlocked
Open Larix Broadcaster and connect to your YouTube stream while the phone is awake. Check the app’s status and, if practical, confirm in YouTube Studio or on a separate device that the broadcast is actually live. A connection attempt in Larix is not the same as a confirmed live picture and sound at the destination.
Give the stream a moment to establish before locking the screen. Check that the image is moving, audio is present if your broadcast includes it, and the connection status does not show an error. If you are testing a devotional, music or ambience stream, listen for a short stretch too; a frozen picture and missing audio can have different causes from a stream that has disconnected altogether.
Once you have verified the broadcast, lock the phone normally. Wait and check the stream from another device rather than repeatedly waking the Vivo, since doing so can obscure whether it continues on its own. Keep the test short at first. If it ends, note approximately when and what the phone was doing, such as switching from Wi-Fi to mobile data, entering a power-saving mode, or reaching a low battery warning.
This sequence matters because a stream that never connected cannot be diagnosed as a lock-screen problem. It also gives you a useful baseline: if the broadcast works while unlocked and ends only after the screen turns off, background operation or power management becomes a more plausible place to investigate. For a wider view of making existing uploads into a continuous broadcast, see this guide to turning YouTube uploads into a 24/7 live channel.
What Larix background streaming is intended to do
Softvelum’s Larix FAQ says Android background streaming is available by default. It describes Larix as continuing in the background until you explicitly close the app. In ordinary use, that means switching away from Larix or locking the display should not, by itself, be treated as an instruction to stop the broadcast.
That is the intended app behaviour, not a promise that every phone permits an uninterrupted session. Android includes background battery modes, and manufacturers may add power controls of their own. The app can be designed to continue running while the phone’s operating system or manufacturer settings limit its background activity. This is why the Vivo settings matter when Larix is reliable with the screen on but stops after you lock it.
Also distinguish locking the display from closing Larix. A lock button turns off the screen; explicitly closing the app or using a system control that stops it is different. Avoid swiping Larix away from the recent-apps view during the test, and do not use a force-stop control. If you want to compare the live workflow with a file-based YouTube loop, the article on making a church sermon playlist repeat automatically on YouTube Live covers a different approach; it does not change how a phone treats Larix in the background.
The useful question is therefore not simply “does Larix support a locked screen?” It does support background streaming on Android by default. The practical question is whether this Vivo’s battery and background-use settings allow the app to keep working when its display is off, and whether the phone can sustain the connection and power demand of your particular stream.
Check whether Larix remains active after locking
After confirming the stream while unlocked, lock the phone and observe the broadcast from another device. If it keeps playing, leave the phone alone for a little longer and note whether the result changes when the display remains off. If it stops, wake the Vivo and check Larix before changing settings. A clear disconnect, a frozen preview, a warning or an app that has disappeared from the active task can each point to a different problem.
Do not assume that a dark screen means Larix has stopped. The phone’s screen can be off while the app continues transmitting. Conversely, seeing Larix still listed among recent apps does not prove that the broadcast is reaching YouTube. Use the destination stream as the check, and make a note of whether it ended, merely buffered, or continued without visible evidence on the phone.
Check whether Larix was explicitly closed, whether a recent-apps action dismissed it, or whether a system battery feature was enabled during the test. If the stream ends only after a long interval, compare that interval with any power-saving or battery threshold you observed, but do not infer a universal timeout from one attempt. Repeat under the same network and battery conditions after each change.
A useful record is simple: note the Vivo model, Android and Vivo software version, whether you used Wi-Fi or mobile data, Larix’s battery mode, and what you changed. This information makes a support query more productive and prevents cycling through unrelated settings. The exact labels vary, so describing what you see is more useful than relying on instructions for a different Vivo model.
Review Vivo battery restrictions
Vivo’s support pages identify a control associated with high background power consumption, but they do not establish one menu path that applies to every phone. Search the Vivo Settings app for terms such as “Larix”, “battery”, “background”, or “high background power consumption”. Depending on the model and software release, the setting may appear under battery management or an app-specific information page, or it may not be present under that exact name.
If you find a control that limits Larix in the background, review what it does before changing it. Permit background use for Larix for the test, then lock the phone and check the stream again. Do not change several unrelated battery controls at once. If the result improves, you have evidence that a restriction was involved; if not, restore settings you do not need and continue with the next check.
Android’s background optimisation documentation explains app battery modes including Unrestricted, Optimized and Restricted. Restricted prevents an app from running in the background. The precise menus can differ by Android version, and Vivo may apply additional manufacturer-specific controls, so use Android’s documentation to understand the distinction rather than expecting its examples to match your screen exactly.
Where the Android app battery page offers a choice, check the mode assigned to Larix. Optimized is the default on Android; it balances background activity and battery use. Unrestricted allows more background activity and can use more power. Restricted is unsuitable for an app that needs to keep streaming after the display is off. If you temporarily select a less restrictive mode to diagnose the issue, check the battery impact and decide whether you want to keep it after the test.
A setting that permits background activity is not a guarantee that every stream will continue. The connection can still fail because of weak mobile coverage, an interrupted Wi-Fi connection, low battery or another phone-level limit. Vivo notes that weak signal and prolonged live-streaming use can increase power consumption; see its battery and background-power support information. Treat these as separate checks instead of assuming a battery toggle fixes every disconnect.
Check app background permissions
Look for app-specific permissions or background-use controls for Larix in Vivo Settings. Search Settings rather than following a fixed sequence of menu names: Vivo models and software versions can arrange app information, battery use and background permissions differently. If your phone offers an option to allow background activity or auto-start for Larix, read its description and enable only what is relevant to the test.
Some devices provide an app-lock or recent-apps option intended to keep an app available. That may help prevent a manual cleanup action from dismissing Larix, but it is not equivalent to Android’s battery mode or a setting that allows background work. Do not assume a padlock icon or a “keep open” option grants all the permissions needed for a continuous stream. Test the result rather than relying on the label alone.
Make sure the phone is not in an active power-saving mode that restricts background work. For a controlled test, temporarily turn off a power-saving feature if it is enabled, allow Larix to run in the background, and then lock the screen after confirming the live stream. If this changes the result, re-enable features one at a time to learn which one affects Larix. Keep in mind that relaxed restrictions can use more battery and mobile data.
If you still cannot find the controls, consult the manual or Vivo support for the specific model and software version. Vivo’s support index for battery questions is a starting point, not a universal step-by-step guide. When asking for help, include the phone model and software version, the Larix version if available, whether the test used Wi-Fi or mobile data, and the settings you have already checked.
Retest and observe where the stream ends
After each change, repeat the same test: connect in Larix while unlocked, confirm the YouTube stream, lock the display and observe from a separate device. Change only one relevant setting between tests. That makes the outcome meaningful: if you alter Android’s battery mode, Vivo background use and power-saving controls together, you will not know which change mattered.
Use the symptoms to narrow the next check. If the broadcast never goes live while the phone is unlocked, investigate the connection setup and network before changing screen-lock permissions. If it starts correctly and stops soon after lock, prioritise background battery modes and Vivo restrictions. If it runs for a while and then ends, check whether signal, battery level or power-saving behaviour changed. These are clues, not proof; repeat the test before drawing a conclusion.
Try to keep network conditions consistent. Wi-Fi may be steadier in one location, while mobile data may be the only practical connection elsewhere. A weak signal can increase power use and disrupt the connection. If the stream fails only on mobile data, test the coverage and data connection separately from background permissions. For a continuous YouTube channel, dependable upload connectivity matters as much as the app setting; this upload-speed guide for a 24/7 YouTube stream can help you think about the network side, though its specific example is not a substitute for testing your own connection.
Battery capacity is another separate constraint. Streaming, mobile data and background activity draw power, and Vivo warns that extended live-streaming can contribute to faster battery use. A compatible power bank may help if the phone runs out of charge during a session, but it will not make Android run Larix if the app is restricted. Check your phone’s charging compatibility and keep the device in a safe, ventilated place while testing.
If you have adjusted the relevant settings and the stream still stops, avoid treating any single model-specific trick as a guaranteed fix. Record what happens and contact Vivo or Softvelum with the details; also check whether an app or system update changed the behaviour. If the priority is an always-on YouTube channel rather than a phone-based broadcast, a workflow that does not depend on keeping your handset active may remove the specific burden of maintaining Larix on a locked phone. StreamNeo turns an uploaded video into a YouTube live stream that runs with your computer switched off, so you do not need to keep a phone awake to sustain that file-based broadcast.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
Does Larix Broadcaster support streaming with the Vivo screen locked?
Larix supports background streaming on Android by default, and Softvelum says it continues until explicitly closed. Whether it continues on your Vivo depends on the phone’s battery restrictions, background permissions, network and power state. Confirm the stream while unlocked, then test with the screen locked.
Which Vivo setting should I change first?
There is no single menu path or label that applies to every Vivo model. Search Settings for Larix, battery, background use or high background power consumption, then check Larix’s Android battery mode as well. Change one relevant setting at a time and verify the stream after each change.
Will a power bank stop Larix from disconnecting?
A power bank can help if the phone’s battery is the limiting factor, provided it is compatible with your device. It cannot override an operating-system restriction that prevents Larix from running in the background. Diagnose battery limits and background permissions separately.
What should I do if the stream still ends after changing settings?
Repeat the test under consistent network conditions and note when the stream ends, what the phone shows, and which settings you changed. Check the model-specific Vivo manual or contact Vivo or Softvelum with your phone and software versions. Screen locking is not guaranteed to work on every Vivo configuration, so avoid relying on an untested setup for a session that cannot be interrupted.