I have Windows 11 installed on a Lenovo Yoga Slim 7 (AMD) laptop, and I installed Zorin OS 17.3 Core on an external SSD (USB) to try it out first.
Two weird power-related issues I'm facing in Zorin:
The laptop doesn't go to suspend/sleep mode when the lid is closed
When I have an external monitor connected via a USB hub, and if the laptop is put in suspend mode and then woken up, the external display stays black (not waking up).
Fast Startup and Secure Boot are disabled in BIOS.
Anyone got any ideas or suggestions I can try to fix these issues.
I can imagine that here are 2 Things that might be an Issue. First would be the Point that Zorin is installed on an external Drive. And the 2nd one the Point that you have connected the Monitor via a USB Hub.
Unfortunately, the laptop doesn't have an HDMI port, so a hub is the only way for an external display. Tried a different hub as well. Sometimes the external display wakes up fine (on both hubs), but sometimes it doesn't.
If this hub device is USB based, its likely that your computer's power management, is disabling USB power during suspend, which would kill your display service. There should be a setting for this in your computers BIOS.
I have an MSI Raider notebook, and there is a setting in my BIOS, to enable USB power during suspend. I just can't remember if I had to unlock my full BIOS to find it, or if it was in the basic options.