My Dell XPS will not sleep or shut down properly - I have checked all drivers/updates and everything is up to date but I can't seem to get my laptop to sleep or shut down properly. The only way I can turn it off it by pressing the power button for about 5 secs. Please advise.
BIOS Version: 2.10.0
Have you tried.
sudo nano /etc/default/grub
make sure that the GRUB_CMDLINE_LINUX line has the following items:
GRUB_CMDLINE_LINUX="nouveau.blacklist=1 acpi_osi=! acpi_osi=\"Windows 2015\" acpi_backlight=vendor mem_sleep_default=deep"
I assume you're using Windows?
I had a similar issue with the 9550. Using the Event Log I found that it tried to wake up a couple hours after going to Sleep to automatically switch over to Hibernate, but work up instead (backpack hot!!!). Subsequently, it wouldn't want to Sleep/Hibernate/soft Shutdown, as you say. Hard Shutdown worked, until next occasion.
Workaround: set "Hibernate After" in advanced power profile settings to Never (0). Also reflash BIOS (can be same version), because this seems to reset something.
Mind this make time to battery dead shorter, because Sleep uses more power than Hibernate. For longer periods use Hibernate directly (but for me it isn't exactly 100% certain to wake up from it).
Sorry, it might be an unrelated problem. Unfortunately, sleep etc issues are difficult to debug. Try checking Event Viewer / System log for suspicious events. You can also try debugging using the powercfg command options (in admin command prompt window).
Firstly, check out if your laptop is using old S3 sleep or new Modern Sleep / Connected Standby.
I'm noticing the clock on my Dell XPS keeps malfunctioning too and I'm not sure why - to restore it I have to keep going to Adjust Time & Date -------> Turn Off "Set Time Automatically" --------> Turn it back on to reset it to current time.