In this article, we will provide an in-depth guide on how to fix a common sleep issue on Ubuntu 21.04, particularly for users with an AMD 5700u CPU. This problem typically manifests as a black screen upon waking up from suspension, with the keyboard backlight blinking.
Upgrading to a newer kernel version or trying different kernel versions may help resolve the sleep issue on Ubuntu 21.04 with an AMD 5700u CPU. Additionally, disabling the blank screen for power saving or checking for specific hardware-related fixes can be attempted. If none of these solutions work, reporting the issue to the Linux Kernel bugzilla or the Ubuntu bug tracker may be helpful.
Understanding the Problem
The sleep issue seems to be prevalent among users of Ubuntu 21.04 with an AMD 5700u CPU. When the PC is suspended, the screen, fans, and keyboard backlight turn off as expected. However, upon waking up, the screen remains black and the keyboard backlight starts blinking. The only way to unlock it is to click the power button, which results in a restart and potential data loss.
Potential Solutions
1. Upgrade the Kernel Version
Some users have reported that upgrading to a newer kernel version resolved their sleep issues. You might have tried kernel versions 5.11 and 5.12, but it’s worth considering trying even newer versions, such as 5.15.5 or newer.
To upgrade your kernel, you can use the following command:
sudo apt-get install --install-recommends linux-generic-hwe-20.04This command installs the latest Hardware Enablement (HWE) stack for Ubuntu, which includes the latest kernel. The --install-recommends option ensures that recommended packages for the HWE stack are also installed.
2. Try Different Kernel Versions
In some cases, downgrading to a previous kernel version has helped resolve sleep issues. You can try different kernel versions to see if any of them work better with your hardware.
To downgrade your kernel, you can use the apt-get install command with the specific version you want to install. For example:
sudo apt-get install linux-image-5.11.0-22-genericThis command installs the specific kernel version 5.11.0-22. Replace “5.11.0-22” with the version you want to install.
3. Disable Blank Screen for Power Saving
As a temporary workaround, you can try disabling the blank screen for power saving. This can be done by going to System Settings, selecting Power, and then adjusting the Power Saving settings to set the Blank Screen option to “Never.” This may prevent the black screen issue upon waking up from suspension.
4. Check for Specific Hardware-Related Fixes
Sleep issues may be specific to certain hardware configurations. It’s worth checking forums, Reddit threads, or official support channels for your specific laptop model or AMD Ryzen processors to see if there are any known fixes or workarounds provided by the manufacturer or the Linux community.
5. Report the Issue
If none of the above solutions work, it may be helpful to report the issue to the Linux Kernel bugzilla or the Ubuntu bug tracker. This can help bring attention to the problem and potentially lead to a fix in future kernel updates.
Conclusion
While these solutions are based on user experiences and may not guarantee a resolution for your specific case, they provide a good starting point for troubleshooting sleep issues on Ubuntu 21.04 with an AMD 5700u CPU. Always remember to backup your data before making any changes to your system or kernel versions. Stay patient and persistent in your troubleshooting efforts, and don’t hesitate to seek help from the Linux community when needed.
You can check your kernel version by opening a terminal and running the command uname -r. It will display the current kernel version installed on your system.
Upgrading to a newer kernel version may introduce new features and bug fixes, but it can also have compatibility issues with certain hardware or software. It is generally safe to upgrade using the official repositories, but it is recommended to backup your important data before making any changes to your system.
To downgrade your kernel version, you can use the apt-get install command with the specific version you want to install. For example, sudo apt-get install linux-image-5.11.0-22-generic installs the kernel version 5.11.0-22. Make sure to replace "5.11.0-22" with the version you want to install.
To report a sleep issue, you can visit the Linux Kernel bugzilla website (https://bugzilla.kernel.org/) or the Ubuntu bug tracker (https://bugs.launchpad.net/ubuntu) and create a new bug report. Provide detailed information about your hardware, the steps to reproduce the issue, and any error messages or logs that may be relevant to help the developers understand and address the problem.
Disabling the blank screen for power saving will prevent the screen from turning off during periods of inactivity, which may consume more power. However, it is only a temporary workaround to prevent the black screen issue upon waking up from suspension. Once the sleep issue is resolved, it is recommended to re-enable the blank screen for power saving to conserve energy.
