This issue occurs after switching to the nvidia-driver-470 driver on a fresh install of Ubuntu 21.10, but I have been experiencing it in some form since at least 20.10, without being able to find any solution.
When I suspend my system via either the "Suspend" button on the top bar, sytemctl suspend or my laptop's sleep button, after the screen first goes black the desktop and the suspend login screen are briefly shown in succession, and only then the screen, power LED and fan turn off like normally.
The timing of the brief "fake resume" is not consistent: sometimes it only shows the login screen, sometimes it stops the suspension until briefly after I login.
When resuming after this has happened, the login screen appears as normal, but I have to wait for any internet connection to restart, and my second screen remains blacks despite it being detected and the display mode remaining on "join displays", until I change the display mode back and forth to fix it.
These issues persist (with slightly altered timing) if I switch to an older proprietary driver (I tried nvidia-driver-390 and nvidia-driver-460), but do not appear while using the nouveau driver.
My hardware:
lshw -short
H/W path Device Class Description
======================================================
system N551JK (ASUS-NotebookSKU)
/0 bus N551JK
/0/0 memory 64KiB BIOS
/0/8 processor Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz
/0/8/9 memory 1MiB L2 cache
/0/8/a memory 256KiB L1 cache
/0/8/b memory 6MiB L3 cache
/0/c memory 8GiB System Memory
/0/c/0 memory DIMM [empty]
/0/c/1 memory DIMM [empty]
/0/c/2 memory 8GiB SODIMM DDR3 Synchronous 1600 MHz (0,6 ns)
/0/c/3 memory DIMM [empty]
/0/100 bridge Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller
/0/100/1 bridge Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller
/0/100/1/0 display GM107M [GeForce GTX 850M]
/0/100/2 display 4th Gen Core Processor Integrated Graphics Controller
/0/100/3 multimedia Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller
/0/100/14 bus 8 Series/C220 Series Chipset Family USB xHCI
/0/100/14/0 usb3 bus xHCI Host Controller
/0/100/14/0/1 generic SAMSUNG_Android
/0/100/14/0/3 input 2.4G Wireless Mouse
/0/100/14/0/5 communication Atheros AR3012 Bluetooth
/0/100/14/0/7 multimedia USB2.0 UVC HD Webcam
/0/100/14/1 usb4 bus xHCI Host Controller
/0/100/16 communication 8 Series/C220 Series Chipset Family MEI Controller #1
/0/100/1a bus 8 Series/C220 Series Chipset Family USB EHCI #2
/0/100/1a/1 usb1 bus EHCI Host Controller
/0/100/1a/1/1 bus Integrated Rate Matching Hub
/0/100/1b multimedia 8 Series/C220 Series Chipset High Definition Audio Controller
/0/100/1c bridge 8 Series/C220 Series Chipset Family PCI Express Root Port #1
/0/100/1c.1 bridge 8 Series/C220 Series Chipset Family PCI Express Root Port #2
/0/100/1c.2 bridge 8 Series/C220 Series Chipset Family PCI Express Root Port #3
/0/100/1c.2/0 wlp4s0 network AR9462 Wireless Network Adapter
/0/100/1c.3 bridge 8 Series/C220 Series Chipset Family PCI Express Root Port #4
/0/100/1c.3/0 generic RTL8411B PCI Express Card Reader
/0/100/1c.3/0.1 enp5s0f1 network RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
/0/100/1d bus 8 Series/C220 Series Chipset Family USB EHCI #1
/0/100/1d/1 usb2 bus EHCI Host Controller
/0/100/1d/1/1 bus Integrated Rate Matching Hub
/0/100/1f bridge HM86 Express LPC Controller
/0/100/1f.2 storage 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode]
/0/100/1f.3 bus 8 Series/C220 Series Chipset Family SMBus Controller
/0/1 system PnP device PNP0c01
/0/2 system PnP device PNP0c02
/0/3 system PnP device PNP0b00
/0/4 generic PnP device INT3f0d
/0/5 system PnP device PNP0c02
/0/6 system PnP device PNP0c02
/0/7 generic PnP device ETD0108
/0/9 generic PnP device ATK3001
/0/a system PnP device PNP0c02
/0/b system PnP device PNP0c02
/0/d scsi2 storage
/0/d/0.0.0 /dev/sda disk 1TB HGST HTS541010A9
/0/d/0.0.0/1 /dev/sda1 volume 503GiB Windows NTFS volume
/0/d/0.0.0/2 /dev/sda2 volume 427GiB Windows NTFS volume
/0/e scsi4 storage
/0/e/0.0.0 /dev/sdb disk 500GB Samsung SSD 860
/0/e/0.0.0/1 /dev/sdb1 volume 900MiB Windows NTFS volume
/0/e/0.0.0/2 /dev/sdb2 volume 100MiB Windows FAT volume
/0/e/0.0.0/3 /dev/sdb3 volume 128MiB reserved partition
/0/e/0.0.0/4 /dev/sdb4 volume 333GiB Windows NTFS volume
/0/e/0.0.0/5 /dev/sdb5 volume 582MiB Windows NTFS volume
/0/e/0.0.0/6 /dev/sdb6 volume 130GiB EXT4 volume
