I have a brand new Precision 3560 with all-Intel graphics (no Nvidia).  Running Linux, it will successfully go into s2idle suspend (sleep) but upon waking, the system will immediately freeze hard. In its frozen state, the mouse pointer will be visible against a black screen.  Here are the troubleshooting steps I have taken so far:

- Can successfully reproduce under Manjaro (stable), Ubuntu 20.04.2 (gdm3), Kubuntu 20.04.2 (sddm).  

- There's some evidence online that this issue, or something similar, was introduced in/around kernel 5.6.19 -- I have not been able to get Ubuntu to boot under a kernel earlier than 5.8 so I cannot confirm this.

- Updated BIOS to latest (1.6).  'Block sleep' is off. System > SATA is 'AHCI'.  Post Behavior > Fastboot is 'Thorough'.  Secure Boot is disabled. 

- Determined that this BIOS does not appear to support 'deep' sleep, only s2idle. So, the hacks and tricks involving adding grub command-line flags to force deep sleep do not have any effect here. 

- The problem does NOT occur if I boot to an Ubuntu 20.04.2 live USB disk.  I compared the drivers that are loaded in that environment vs. those that are loaded under the installed OS and did not notice anything suspicious (just a few things that enable the live session and installer to run off the USB drive).

I've been working on this for a couple days now. I'm motivated to get it resolved because I otherwise really like the machine -- Linux otherwise runs flawlessly on this machine. 

Any help would be greatly appreciated.