Comment 79 for bug 1798961

I confirm Solution #58 (add `ahci.mobile_lpm_policy=0` to boot options works great). Thanks @prasanth-s-cmi!

It fixed freezes and "didn't wake up" problem on Dell Latitute 7390 2018 year manufactured.

dev@dev-L-7390:~$ inxi -Fz

System: Host: dev-L-7390 Kernel: 5.0.0-37-generic x86_64 bits: 64 Desktop: Gnome 3.28.4
           Distro: Ubuntu 18.04.3 LTS
Machine: Device: laptop System: Dell product: Latitude 7390 serial: N/A
           Mobo: Dell model: 09386V v: A00 serial: N/A UEFI: Dell v: 1.13.1 date: 11/08/2019
Battery BAT0: charge: 17.8 Wh 30.3% condition: 58.7/60.0 Wh (98%)
CPU: Quad core Intel Core i7-8650U (-MT-MCP-) cache: 8192 KB
           clock speeds: max: 4200 MHz 1: 800 MHz 2: 800 MHz 3: 800 MHz 4: 800 MHz 5: 800 MHz 6: 800 MHz
           7: 800 MHz 8: 800 MHz
Graphics: Card: Intel UHD Graphics 620
           Display Server: x11 (X.Org 1.20.4 ) drivers: fbdev (unloaded: modesetting,vesa)
           Resolution: 1920x1080@60.00hz
           OpenGL: renderer: Mesa DRI Intel UHD Graphics 620 (Kabylake GT2) version: 4.5 Mesa 19.0.8
Audio: Card Intel Sunrise Point-LP HD Audio driver: snd_hda_intel Sound: ALSA v: k5.0.0-37-generic
Network: Card-1: Intel Ethernet Connection (4) I219-LM driver: e1000e
           IF: enp0s31f6 state: down mac: <filter>
           Card-2: Intel Wireless 8265 / 8275 driver: iwlwifi
           IF: wlp2s0 state: up mac: <filter>
Drives: HDD Total Size: 512.1GB (4.2% used)
           ID-1: /dev/sda model: TOSHIBA_KSG60ZMV size: 512.1GB
Partition: ID-1: / size: 42G used: 4.8G (13%) fs: ext4 dev: /dev/sda5
           ID-2: /home size: 309G used: 956M (1%) fs: ext4 dev: /dev/sda7
           ID-3: swap-1 size: 16.00GB used: 0.00GB (0%) fs: swap dev: /dev/sda6
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 44.0C mobo: N/A
           Fan Speeds (in rpm): cpu: 0
Info: Processes: 293 Uptime: 8:54 Memory: 1873.3/15916.4MB Client: Shell (bash) inxi: 2.3.56