From Fedora Project Wiki
Description
This test case tests whether DPMS functionality works successfully with the radeon video driver. You must be using a card supported by the radeon video driver.
Setup
- Ensure the nomodeset and radeon.modeset=0 kernel parameters are not set in your bootloader configuration
- You can see your current kernel options by running
cat /proc/cmdline
- You can see your current kernel options by running
- Ensure the file
/etc/X11/xorg.conf
does not exist, or is a valid file that uses the radeon driver - Shut your system down entirely, then start it up again
- If using a live image to test, ignore the above steps and simply boot the system from the live image with default options
How to test
- Run the command
sleep 5 && xset dpms force off
Expected Results
- After 5 seconds the display should blank. It should recover correctly when the mouse is moved