Quick answer

Keep Slack Active on Windows 11

Windows 11 introduced Modern Standby and aggressive energy policies that throttle background apps like Slack. Idle Pilot keeps your Slack presence active from the cloud, unaffected by any Windows 11 power settings.

Why this happens

Windows 11 changed how computers handle power in ways that particularly affect always-on apps like Slack. Modern Standby (previously called Connected Standby or S0 Low Power Idle) replaces traditional sleep on newer hardware. Instead of fully suspending like classic sleep (S3), Modern Standby enters a low-power state where the system periodically wakes to check for updates and notifications. In theory, Slack could stay connected during Modern Standby. In practice, Windows limits which apps can wake the CPU and use the network during these low-power phases. Slack doesn't have the system-level privileges needed to be included in the wake list. Energy Recommendations, introduced in Windows 11 22H2, actively suggests turning on features that reduce background activity. If you follow these recommendations, Slack presence gets worse. Smart App Control and Windows Security can also limit background app behavior. The Power Throttling feature in Windows 11 detects apps running in the background and reduces their CPU allocation. Slack's Electron-based client gets throttled when it's not in the foreground, slowing down its heartbeat timers. On laptops, the default power plan in Windows 11 is more aggressive than Windows 10. The 'Balanced' plan in Windows 11 sleeps the display after 5 minutes on battery and the system after 10, a combination that almost guarantees Slack will go away during any non-interactive task.

The reliable solution

Local workarounds try to keep your device active, but they can't solve the fundamental problem: Slack needs constant signals from your device. When your device sleeps, locks, or loses connection, those signals stop.

Cloud-based presence scheduling Cloud-based presence scheduling like Idle Pilot runs on always-connected servers. It maintains your Slack status during scheduled hours regardless of what your device is doing.

Works even when your laptop is closed or off
No local installs or device workarounds needed
No workspace bot or admin approval required
Set your schedule once, it handles the rest

Try Idle Pilot free for 7 days

Platform-specific options

Here are platform-specific settings you can adjust. Note that these are workarounds with limitations, not complete solutions.

Windows 11

1 Go to Settings > System > Power & battery and set screen and sleep timeouts to longer values
2 Under 'Power mode', select 'Best performance' instead of 'Best power efficiency' or 'Balanced'
3 Open Settings > System > Power & battery > Energy recommendations and review each suggestion before applying
4 In Task Manager > Details, right-click Slack.exe > Set Priority > Above Normal to reduce power throttling
5 For domain-joined machines, check Group Policy for enforced power settings that may override your choices

Limitation: Corporate group policies can override personal power settings. Changing to 'Best performance' significantly reduces battery life on laptops.

Set up scheduled presence in 3 steps

Get reliable Slack presence without device workarounds:

Step 1

Connect your Slack account

Authorize Idle Pilot to update your presence. This uses Slack's standard OAuth, no workspace bot installation needed.
Step 2

Set your schedule

Choose the days and hours you want to appear active. Set your timezone so it aligns with your actual work hours.
Step 3

Enable and forget

Turn on your schedule and you're done. Idle Pilot keeps your Slack status active during those hours, regardless of your device state.

Troubleshooting

Modern Standby doesn't keep Slack connected like it should

Modern Standby is selective about which apps stay active. Slack isn't on the privileged list. Cloud scheduling operates outside your Windows machine entirely, so Modern Standby doesn't affect it.

Power Throttling reduces Slack's background priority

You can set Slack to 'Above Normal' priority in Task Manager, but Windows may still throttle it on battery. Cloud-based presence is never throttled because it runs on dedicated cloud servers.

Energy Recommendations made Slack presence worse after I applied them

Microsoft's Energy Recommendations enable settings that conflict with background app persistence. You can reverse individual recommendations in Settings > Power & battery. Cloud scheduling works regardless of these settings.

Windows 11 on a new laptop is more aggressive than my old Windows 10 machine

Windows 11's default power profiles are tuned for battery longevity over app persistence. The combination of Modern Standby, Power Throttling, and shorter default timeouts makes Slack presence harder. Cloud scheduling provides the same reliable presence on Windows 11 as on any other OS.

FAQs

What is Modern Standby and how does it affect Slack?

Modern Standby replaces traditional sleep on newer Windows 11 hardware. Instead of fully suspending, the system enters a low-power state with periodic wake cycles. But Slack isn't on the privileged list of apps that can use these wake cycles, so it effectively goes offline during Modern Standby.

Does Power Throttling in Windows 11 affect Slack?

Yes. Power Throttling detects background apps and reduces their CPU allocation. Since Slack's Electron client runs JavaScript timers for its heartbeat, throttled CPU means delayed timers and potentially missed heartbeats. You can set Slack to 'Above Normal' priority in Task Manager as a partial workaround.

Should I follow Windows 11's Energy Recommendations?

Energy Recommendations are good for battery life but bad for background app persistence. Each recommendation you apply makes Slack presence less reliable. Review them individually and understand that options like shorter screen timeout and reduced background activity directly affect Slack.

Why is Slack presence worse on my new Windows 11 laptop compared to my old Windows 10 one?

Windows 11 defaults are tuned for battery longevity. The Balanced power plan is more aggressive, display timeout is shorter, and Modern Standby replaces classic sleep. Combined with Power Throttling, Windows 11 creates a harder environment for apps that need persistent background connections.

Can I switch from Modern Standby to classic S3 sleep on Windows 11?

Some systems allow disabling Modern Standby through BIOS settings or registry changes, reverting to S3 sleep. However, this isn't supported on all hardware, may cause other issues, and doesn't actually help Slack since classic sleep also disconnects Slack completely.

Does Smart App Control in Windows 11 affect Slack presence tools?

Smart App Control can block unsigned or uncommon executables, which may include third-party presence tools or mouse jigglers. Cloud-based presence scheduling doesn't involve any local executables, so Smart App Control doesn't interfere with it at all.