When closing the lid, the device does not suspend (even if settings are correctly configured), and even when clicking “suspend” from the menu, the screen switches off, but the computer is not idle. I am using a ThinkPad so a proof of this is that the ThinkPad red light on the back stays lit and still.
Hi Tommi. Suspend issues are very prevalent, but it’s certainly not a generic problem (my suspend works fine). This can be documented in Common Issues only if have a good understanding that some unusually large amount of hardware is affected (and which). For the moment I’ll place it into the Ask in English category.
Is fstrim.service running when the issue occurs? I experienced the same issue, and found that it was because fstrim.service was blocking the suspend. In my case the output of journalctl -b0 had a line containing the phrase Freezing user space processes failed and under that line I found the reason for the failure to suspend. It could be you’ll find clues there.