| Issue | Primary Cause | Quick Fix |
|---|---|---|
| Slack Screen Flickering | NVIDIA Hardware Acceleration Conflict | Disable Hardware Acceleration in Slack Settings |
What is Slack Screen Flickering?
Slack screen flickering is a visual glitch where the application window flashes, stutters, or displays black boxes. This issue is most common on Windows systems equipped with NVIDIA graphics cards.
The root cause typically lies in how the Electron framework—which powers Slack—interacts with NVIDIA’s hardware acceleration and G-Sync features. When the GPU and the app fail to synchronize their frame rendering, the user sees flickering.
Step-by-Step Solutions
Method 1: Disable Hardware Acceleration in Slack
The most effective fix is to prevent Slack from using your GPU to render the interface. This forces the CPU to handle the UI, bypassing NVIDIA driver conflicts.
- Open Slack.
- Click on your workspace name or the Menu icon (three horizontal lines).
- Navigate to File > Preferences.
- Select the Advanced tab on the left sidebar.
- Under Hardware Acceleration, uncheck the box labeled “Enable hardware acceleration”.
- Restart Slack for the changes to take effect.
Method 2: Configure NVIDIA Control Panel Settings
If you want to keep hardware acceleration enabled for performance reasons, you can tweak the NVIDIA driver settings specifically for the Slack executable.
- Right-click your desktop and open the NVIDIA Control Panel.
- Go to Manage 3D settings > Program Settings.
- Click Add and locate
slack.exe(usually in your AppData folder). - Change Vertical sync to “Off” or “On” (test both to see which stops the flicker).
- Set Power management mode to “Prefer maximum performance”.
- Click Apply and restart the app.
Method 3: Launch with Command Line Flags
If the flickering prevents you from accessing the settings menu, you can force Slack to start without GPU support using a terminal command.
Open your terminal or Command Prompt and run the following:
slack.exe --disable-gpuAlternatively, you can right-click your Slack desktop shortcut, go to Properties, and add --disable-gpu to the end of the Target field.
Method 4: Update or Roll Back NVIDIA Drivers
Sometimes, a specific driver version introduces bugs with Chromium-based apps. Check for updates in GeForce Experience or the NVIDIA website.
If the flickering started immediately after a driver update, consider using Display Driver Uninstaller (DDU) to perform a clean install of a previous, stable version.