I updated to Ubuntu 22.04 and there is something wrong when I suspend my computer: I have that screen:

I'm using NVIDIA driver (nvidia-driver-470) and I'm on X11 and since the update I can't switch to Wayland anymore from the login session.

edit (23/04/2022):

$ sudo dmidecode -s bios-version

X751LN.302



$ free -h

               total        used        free      shared  buff/cache   available

Mem:            11Gi       1,7Gi       8,1Gi       270Mi       1,8Gi       9,4Gi

Swap:          2,0Gi          0B       2,0Gi





$ sysctl vm.swappiness 

vm.swappiness = 60



$ swapon -s

Filename                Type        Size        Used        Priority

/swapfile                               file        2097148     0       -2







$ sudo lshw -C memory

  *-firmware                

       description: BIOS

       vendor: American Megatrends Inc.

       physical id: 0

       version: X751LN.302

       date: 01/30/2015

       size: 64KiB

       capacity: 6MiB

       capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb smartbattery biosbootspecification uefi

  *-cache:0

       description: L2 cache

       physical id: 9

       slot: CPU Internal L2

       size: 512KiB

       capacity: 512KiB

       capabilities: internal write-back unified

       configuration: level=2

  *-cache:1

       description: L1 cache

       physical id: a

       slot: CPU Internal L1

       size: 128KiB

       capacity: 128KiB

       capabilities: internal write-back

       configuration: level=1

  *-cache:2

       description: L3 cache

       physical id: b

       slot: CPU Internal L3

       size: 4MiB

       capacity: 4MiB

       capabilities: internal write-back unified

       configuration: level=3

  *-memory

       description: System Memory

       physical id: c

       slot: System board or motherboard

       size: 12GiB

     *-bank:0

          description: SODIMM DDR3 Synchronous 1600 MHz (0,6 ns)

          vendor: Micron

          physical id: 0

          serial: 00000000

          slot: ChannelA-DIMM0

          size: 4GiB

          width: 64 bits

          clock: 1600MHz (0.6ns)

     *-bank:1

          description: DIMM [empty]

          product: [Empty]

          vendor: [Empty]

          physical id: 1

          serial: [Empty]

          slot: ChannelA-DIMM1

     *-bank:2

          description: SODIMM DDR3 Synchronous 1600 MHz (0,6 ns)

          vendor: 0000

          physical id: 2

          serial: 0104AB19

          slot: ChannelB-DIMM0

          size: 8GiB

          width: 64 bits

          clock: 1600MHz (0.6ns)

     *-bank:3

          description: DIMM [empty]

          product: [Empty]

          vendor: [Empty]

          physical id: 3

          serial: [Empty]

          slot: ChannelB-DIMM1

I think i don't have ram issues according to memtest :

I manage to get Wayland back by editing

/usr/lib/udev/rules.d/61-gdm.rules

as @ManOnTheMoon suggested in comments.