Black screen after suspension on ubuntu 22.04

 A black screen issue after the system resumes from suspension (or sleep) on Ubuntu can be caused by various factors, including graphics drivers, desktop environment, or power management settings. Here are some steps you can follow to diagnose and potentially fix the issue:


1. **Check Graphics Drivers**:

   - Outdated or incompatible graphics drivers can cause issues with resuming from suspension. Ensure that you have the latest graphics drivers installed. You can use the "Additional Drivers" tool in the "Software & Updates" application to check and install proprietary drivers if available.


2. **Tweak Power Management Settings**:

   - Check your power management settings, as they can affect how your system handles suspend and resume. Go to "Settings" -> "Power" and review the settings there. Adjust the settings to see if it resolves the issue.


3. **Check for BIOS/UEFI Updates**:

   - Sometimes, BIOS/UEFI updates can resolve issues related to power management. Check your computer's manufacturer website for any BIOS updates and apply them if available.


4. **Change Desktop Environment**:

   - If the issue persists, you can try switching to a different desktop environment to see if it's a compatibility issue with your current one. Install a different desktop environment, such as Xfce or GNOME, and select it at the login screen.


5. **Tweak Kernel Parameters**:

   - You can try adding kernel parameters to your boot options. Edit the GRUB configuration by opening the `/etc/default/grub` file and adding parameters like `acpi_osi=Linux` or `nomodeset` to the `GRUB_CMDLINE_LINUX` line. Then, run `sudo update-grub` and reboot.


6. **Disable Lock Screen**:

   - Sometimes, the lock screen or screen saver can cause issues when resuming from suspension. Try disabling the lock screen or screen saver in your desktop environment's settings.


7. **Check for Bug Reports**:

   - Search for bug reports related to your specific hardware and Ubuntu 22.04. Others might have encountered and reported the same issue with possible workarounds or fixes.


8. **Consult Ubuntu Forums and Ask Ubuntu**:

   - Check the Ubuntu Forums or Ask Ubuntu for posts related to your issue. Users often share their experiences and solutions to various problems.


9. **Hardware-Specific Issues**:

   - If you suspect that the issue is hardware-specific, especially if you have a relatively new or uncommon hardware configuration, you might need to wait for updates or patches to address these issues. In such cases, you can check for community-driven patches or solutions.


10. **Consider Rolling Back**:

    - If you recently updated your system and the issue started after the update, consider rolling back to a previous kernel version or graphics driver to see if it resolves the problem.


Remember to back up your important data before making significant changes to your system. If none of the above steps resolve the issue, you may need to wait for updates or consult with the Ubuntu community or your hardware manufacturer for further assistance.

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