From Fedora Project Wiki
This test case tests whether suspend / resume works successfully with the (DRIVER) video driver, with kernel mode setting enabled. You must be using a card supported by the (DRIVER) video driver. Your system must be capable of suspending and resuming normally (for instance, it worked in previous Fedora releases, or works if you boot to runlevel 3: otherwise please file a bug against the kernel).
How to test
- Ensure the 'nomodeset' and '(MODULE).modeset=0' kernel parameters are not set in your bootloader configuration
- Ensure the file
/etc/X11/xorg.confdoes not exist, or is a known-good configuration file that uses the (DRIVER) driver
- Shut your system down entirely, then start it up again
- Suspend the system (for e.g. open the system menu, then click Shutdown and select Suspend)
- Resume the system
- The system should come back with the display correct and at the correct resolution, backlight active, etc.