If your Galaxy S26 Ultra screen refuses to turn off automatically, it can drain your battery quickly and become frustrating to manage. You lock the phone, but the display stays on longer than expected, or never turns off at all. This issue is often caused by display settings, smart features, or apps that keep the screen awake in One UI 8.5.
Why Your Galaxy S26 Ultra Screen Timeout Is Not Working
- Screen timeout is set to a very long duration.
- Smart Stay or attention features are keeping the screen awake.
- Certain apps are preventing the screen from turning off.
- Power saving or developer settings are overriding timeout behavior.
- Temporary software glitches affecting display controls.
1. Check Screen Timeout Duration
If the timeout is set too high, the screen will stay on longer than expected. Many users accidentally set it to several minutes and assume it is not working.
Open Settings, and then tap Display.
Tap Screen timeout, and then select a shorter duration like 30 seconds or 1 minute.
2. Turn Off Smart Stay or Attention Features
Smart features use the front camera to detect if you are looking at the screen. If enabled, your phone may keep the display on even when you are not interacting with it.
Go back to the Settings screen, and then tap Advanced features.
Tap Motions and gestures, and then turn off Keep screen on while viewing.
3. Check for Apps Keeping the Screen Awake
Some apps, like video players or games, can override screen timeout settings. If one of these apps is running, your screen may stay on continuously.
Open Settings again, and then tap Battery.
Tap Usage since last full charge, and then check for apps with unusually high screen usage.
Close any active apps that may be keeping the display awake, and then test if the timeout works again.
4. Disable Stay Awake in Developer Options
The Stay Awake feature keeps the screen on while charging. If this is enabled, your phone will ignore screen timeout settings when plugged in.
Open Settings, and then tap Developer options.
Scroll down and find Stay awake, and then turn it off.
If Developer options is not visible, you can skip this step.
5. Restart Your Galaxy S26 Ultra
A simple restart can fix temporary bugs affecting the display timer. It refreshes system processes that control screen behavior.
Swipe down from the top right of the screen, and then open Quick Settings.
Tap the Power icon, and then tap Restart.
Wait for the phone to reboot and check if the screen now turns off as expected.
6. Reset All Settings
If the problem continues, some system settings may be misconfigured. Resetting all settings restores defaults without deleting your personal data.
Open Settings, and then tap General management.
Tap Reset, and then tap Reset all settings.
Confirm the reset and allow the phone to restart if needed.
Fixing screen timeout issues on your Galaxy S26 Ultra is usually quick once you identify what is keeping the display active. After adjusting the right settings, your phone should turn off the screen exactly when you expect it to.
FAQs
Why does my Galaxy S26 Ultra screen stay on while charging?
This usually happens when the Stay Awake option in Developer options is enabled. Turning it off allows the screen timeout to work normally.
Can apps override screen timeout settings?
Yes. Some apps, especially video streaming or gaming apps, can keep the screen on as long as they are active.
Is screen timeout affected by face detection features?
Yes. Features like Smart Stay can keep the screen on when the phone detects your face, even if you are not touching the screen.
