20.04 - Black screen after suspend

[f00bar3]

uname -a
Linux n552vw 5.4.0-29-generic #33-Ubuntu SMP Wed Apr 29 14:32:27 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 20.04 LTS
Release:    20.04
Codename:    focal

Steps to reproduce:
1. Turn on.
2. Suspend and close the laptop lid.
3. Leave overnight.
4. Open lead and press the power button.

Nothing happens. The screen is black. Laptop is ASUS N552VW.

The problem is sporadic. Sometimes it happens, sometimes it is not. Also suspending and trying to turn on right away - works all the time.

Any suggestions?

--

So far I tried to set modset to 0, because my Asus has Intel/NVidia GPUs (which gives problems), I am using an external screen over HDMI as well (which gives problems). It solves the problem Ubuntu would not switch to an external screen.

cat vim /etc/default/grub
cat: vim: No such file or directory
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'


GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX="nouveau.modeset=0"


# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"


# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console


# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480


# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true


# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"


# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

[xxteraxx]

Try doing

 systemctl suspend

And see if the system can wake backup. This will allow you to see what happens with your screen open.
after that press the spacebar to try and wake up the system.

[f00bar3]

Try doing

 systemctl suspend

And see if the system can wake backup. This will allow you to see what happens with your screen open.
after that press the spacebar to try and wake up the system.

It works fine.

Laptop lid is closed. External monitor via HDMI is working.

sudo systemctl suspend

Suspends the laptop, the monitor is off. Pressing "space" powers on the laptop, the monitor is on.

[darkccarbon]

I have Same Problem I Use Kubuntu 20.04.1 before, and i get bad error and i should reinstall kubuntu i install kubuntu 20.04.2 and get this error (cant suspend or hibrenate) i search in internet and found its nvidia driver problem but i didnt found how fix that, i make my solution, my kubuntu default install nvidia 460 version its ubuntu recommended i purge (sudo apt purge nvidia*) that and install nvidia-driver-450 (sudo apt install nvidia-driver-450) and after that i got blackscreen on bootup , after that i purge nvidia-450 and install again nvidia-driver-460 and i suprise my problem fixed i hope help you