Ubuntu can flash the entire display or just the active window’s title whenever the system plays an alert sound. Open Activities, search for Accessibility, go to Hearing, enable Visual Alerts, and select the flash area.
What Ubuntu Visual Alerts do
Visual Alerts are an accessibility option that adds a visible cue to Ubuntu’s built-in alert sounds. Ubuntu describes those sounds as simple signals for certain messages and events. When Visual Alerts is enabled, Ubuntu flashes either the whole screen or the title bar of the current window at the moment that alert sound is played.
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This is useful if you have difficulty hearing system sounds, work in a quiet place such as a library, or need a visual indication without increasing the computer’s volume. It is a visual counterpart to an alert sound, not a general notification-effects engine.
“Your computer will play a simple alert sound for certain types of messages and events.” — Ubuntu Documentation Team
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Where the setting is located
On the Ubuntu desktop covered by the current stable user-help guide, the control is here:
Activities > Accessibility > Hearing > Visual Alerts
The guide is on Ubuntu’s stable help site and does not identify a specific Ubuntu release number. GNOME-based Ubuntu installations generally use this path, but a derivative distribution, a different desktop environment, or a release with redesigned settings may use different labels or placement.
Enable Visual Alerts in Settings
- Open the Activities overview. You can move the pointer to the top-left hot corner or press the Super key on a standard Ubuntu keyboard.
- Start typing Accessibility. You do not need to open a separate search application; typing in the Activities overview searches installed settings panels.
- Select Accessibility from the results to open the accessibility settings panel.
- Open the Hearing section. This section groups options related to audio alerts and hearing access.
- Find Visual Alerts and switch it on.
- Use Flash Area to select the visual scope you want: Entire screen or Current window title.
The change applies as soon as the switch is enabled; there is no Apply or Save button described for this setting. From then on, Ubuntu flashes the selected area when it plays an alert sound.
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Choose the flash area
Ubuntu documents two choices. They differ in how much of the desktop is used as the visual signal:
| Flash Area | What flashes | When it is useful |
|---|---|---|
| Entire screen | The complete display flashes. | Best when you need the strongest, easiest-to-see cue regardless of which application has focus. |
| Current window title | The title area of the currently active window flashes. | Useful when a full-screen flash would be distracting and you can identify the active application from its title bar. |
The official guide does not list controls for flash color, duration, brightness, intensity, animation style, or individual applications. Do not expect a per-program rules editor in this panel.
Turn Visual Alerts on or off from the top bar
After the accessibility menu is available, you can change the setting without opening the full Settings application:
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- Select Visual Alerts to toggle the feature.
Ubuntu’s guide specifically describes this as a quick way to turn visual alerts on and off. The quick menu changes the enabled state; choose the flash area in the Accessibility settings panel.
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If the accessibility icon is missing
The top-bar menu is controlled by a separate setting. Open Accessibility from Activities, then enable Accessibility Menu. Once that menu is enabled, its icon appears in the top bar and provides the Visual Alerts toggle.
Ubuntu documents the following keyboard route in its guide to finding the accessibility menu:
- Press Ctrl+Alt+Tab to move keyboard focus to the top bar.
- Use the arrow keys to move to the accessibility icon.
- Press Enter to open the menu.
- Use the arrow keys to highlight Visual Alerts.
- Press Enter to toggle the selected item.
These instructions come from Ubuntu’s accessibility-menu guide. If the icon still does not appear after enabling the menu, use the full Accessibility settings path instead; the quick menu is optional.
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What causes a visual flash?
Visual Alerts react when Ubuntu plays one of its alert sounds for a supported message or event. The flash therefore follows the alert-sound event; it is not an independent alert stream.
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- If an event does not produce an Ubuntu alert sound, Visual Alerts has no documented signal to flash.
- The feature does not claim to convert every application notification, banner, chat message, or browser event into a flash.
- Changing the flash area changes where the cue appears, not which events generate it.
Ubuntu’s documentation does not publish a complete list of alert-producing events, so the safest expectation is limited to events that already produce the system’s simple alert sound.
Check that the setting is working
First confirm that the switch remains on after you leave the Hearing section. Then make sure the selected flash area matches what you are watching: with Entire screen, the cue can appear anywhere on the display; with Current window title, watch the title area of the focused window.
A flash occurs only alongside an alert sound covered by Ubuntu’s accessibility feature. If an ordinary application notification appears silently, the absence of a flash does not by itself indicate a configuration failure. The documentation does not specify a separate “test flash” button, so there is no documented test control to run from this panel.
Troubleshooting by symptom
The Visual Alerts switch is not where expected
Use the Activities search and open Accessibility, then look specifically under Hearing. The documented path is not a general Notifications setting. If your desktop uses a different environment or a customized Ubuntu derivative, its settings organization may differ from the stable Ubuntu guide.
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The top-bar toggle is unavailable
Enable Accessibility Menu in the Accessibility settings. The top-bar icon is a shortcut, not a prerequisite for the feature. You can always return to Accessibility > Hearing > Visual Alerts to switch it on or off.
The screen does not flash when a notification appears
Check whether the event actually plays an alert sound. Visual Alerts are documented as a response to alert sounds, not as a flash for every notification generated by every application. Also verify that Visual Alerts is enabled and that you are observing the selected area.
The flash is too broad or too easy to miss
Reopen Accessibility > Hearing and change Flash Area. Choose Entire screen for the broadest cue, or Current window title for a localized cue. Ubuntu does not document additional intensity, duration, or color controls in this setting.
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Keyboard navigation does not open the menu
Make sure the accessibility menu itself is enabled first. Then press Ctrl+Alt+Tab, navigate with the arrow keys, and use Enter to open or toggle items, following Ubuntu’s documented keyboard sequence. If the top bar has a different layout, use the full settings panel instead of relying on the shortcut.
Compatibility and requirements
- No extra hardware: Ubuntu documents Visual Alerts as a built-in desktop setting; it does not list a special monitor, speaker, camera, or other accessory requirement.
- No purchase or account: Enabling the option is performed locally in Settings.
- Desktop matters: The cited instructions describe Ubuntu’s documented desktop interface. Labels and locations may not match every Ubuntu release, derivative distribution, or non-GNOME desktop.
- Language and release scope: The cited pages are English-language stable user-help pages and do not state a publication date or release number. Treat the labels as the current documented path rather than a guarantee for every historical or customized installation.
Privacy and interruption considerations
Visual Alerts do not replace the underlying alert sound; they add a visual response when that sound is played. In a quiet environment, you can use the feature without raising the volume, but the full-screen option may be more noticeable to people nearby than the current-window-title option. Select the smallest area that remains visible enough for your needs.
Quick reference
| Goal | Path or action |
|---|---|
| Enable the feature | Activities > Accessibility > Hearing > Visual Alerts > On |
| Choose the scope | In the same panel, set Flash Area to Entire screen or Current window title |
| Toggle quickly | Top-bar Accessibility icon > Visual Alerts |
| Show the top-bar menu | Accessibility settings > Accessibility Menu > On |
| Navigate without a mouse | Ctrl+Alt+Tab, arrow keys to the accessibility icon, Enter to open and toggle |
Bottom line for choosing a setting
Use Entire screen when the alert must be unmistakable anywhere on the display. Use Current window title when you want a less intrusive cue tied to the application you are using. In both cases, the trigger is an Ubuntu alert sound, so the setting should be understood as a visual companion to system alerts rather than a universal replacement for application notifications.
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