ERR_NETWORK_IO_SUSPENDED
Network ErrorWhat Does ERR_NETWORK_IO_SUSPENDED Mean?
ERR_NETWORK_IO_SUSPENDED is a relatively uncommon network error that occurs when the operating system suspends network input/output operations. This typically happens when your device enters a low-power state such as sleep or hibernation, and active network connections are paused or terminated by the system's power management. When the device wakes up, pending network requests that were interrupted during the suspension trigger this error.
Modern operating systems actively manage network resources to conserve power and system resources. When a device goes to sleep, the operating system may close active network connections, disable the network adapter, or put the network stack into a suspended state. Background browser tabs with pending network requests are particularly affected because the browser cannot complete those requests while the network is suspended.
This error can also appear in scenarios where the operating system throttles network activity for background applications. Some operating systems reduce or suspend network access for applications that are not in the foreground to save battery life and bandwidth. Aggressive power-saving modes, battery saver features, and data saver modes can all contribute to network IO suspension.
Common Causes
The primary cause is device sleep or hibernation. When your computer or mobile device goes to sleep while web pages are loading or have open network connections, those connections are interrupted. Upon waking, the browser may display this error for pages that were mid-load when the system went to sleep. The longer the device remains asleep, the more likely it is that connections will be fully terminated rather than resumable.
Power saving and battery management features actively suspend network operations. Windows Battery Saver, macOS Low Power Mode, and mobile device battery optimization can all restrict network access for background applications. These features may limit network activity to essential operations only, suspending non-critical web requests. Some laptop manufacturers also include proprietary power management software that aggressively suspends network adapters.
Browser-level tab management can contribute to this error. Modern browsers like Chrome suspend background tabs to conserve memory and CPU. When a tab is suspended, its network operations may be paused. If the network conditions change during this suspension (such as the device sleeping and waking), the previously suspended network operations may fail with this error when the tab is brought back to the foreground.
Step-by-Step Fix
The simplest fix is to reload the page. Since this error typically occurs after your device wakes from sleep, simply refreshing the page (F5 or Ctrl+R) will initiate new network requests using the now-active network connection. Wait a few seconds after waking your device to ensure the network adapter has fully reconnected before reloading.
If you frequently encounter this error, adjust your power management settings. On Windows, go to Power Options and set your network adapter to not be turned off to save power. Find this in Device Manager > Network Adapters > right-click your adapter > Properties > Power Management > uncheck "Allow the computer to turn off this device to save power". On macOS, uncheck "Put hard disks to sleep when possible" in Energy Saver preferences.
For persistent issues, consider disabling tab suspension in your browser. In Chrome, you can disable tab freezing by going to chrome://flags and searching for "Tab Freeze" or "Tab Discard" settings. Keep in mind that disabling these features will increase memory and battery usage. Also check your antivirus or security software, as some aggressively suspend network operations for applications they consider low-priority.
Related Network Errors
Frequently Asked Questions
What does ERR_NETWORK_IO_SUSPENDED mean?
ERR_NETWORK_IO_SUSPENDED means the operating system suspended network input/output operations, interrupting your browser's network requests. This commonly happens when your device goes to sleep or hibernates, when power saving mode restricts network access, or when the browser suspends background tabs.
Why do I see this error after waking my computer?
When your computer sleeps, it suspends network operations to save power. Active browser connections are interrupted during this time. When the computer wakes, those interrupted connections cannot be resumed and show this error. Simply reloading the page after the network reconnects will fix it.
How do I prevent ERR_NETWORK_IO_SUSPENDED?
Adjust your power settings to keep the network adapter active during sleep. On Windows, go to Device Manager, find your network adapter, open Properties, go to the Power Management tab, and uncheck the power saving option. Also consider adjusting your sleep timer to prevent the computer from sleeping during active browsing.
Does ERR_NETWORK_IO_SUSPENDED cause data loss?
It can cause loss of unsaved data in web applications if the page was in the middle of a network operation (like saving or uploading) when the network was suspended. It does not cause any damage to your computer or files. Any form data that was not submitted will need to be re-entered after reloading the page.
Is ERR_NETWORK_IO_SUSPENDED a serious error?
No, it is not a serious error. It is a temporary condition caused by normal power management behavior. Simply reloading the affected pages will resolve it. It does not indicate any problem with your internet connection, browser, or the website you were visiting.