[Bug 291520] Suspend Issues

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291520

fgorter <fgorter@gmail.com> changed:

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                 CC|                            |fgorter@gmail.com

--- Comment #1 from fgorter <fgorter@gmail.com> ---
Hybrid graphics remain an often perennial annoyance.

Assuming you've tested suspending with the NVidia GPU enabled / disabled in
BIOS/UEFI?

Have you tried setting your desktop environment to probe / zap the display
outputs when connecting / disconnecting from external displays? If memory
serves, as an example, XFCE4 DE has some option in its display management
settings that tell it to wake / popup a notification when a new external
display is connected / disconnected -- effectively probing the display outputs
& forcing all displays to return from "dpms" state mode.

Try writing a small shell script that executes:   "xset dpms force off; sleep
5; xset dpms force on" and figure out a way to trigger it. From personal
experience, I've had occasions where one of my 3 displays (all attached to the
same NVidia GPU) would refuse to wake from sleep and / or being powered down.

The simple fix for me, was to execute from terminal:
" xset dpms force standby "
[In Comical French Accent:]
**A Few Seconds Later**
Move the Mouse, or
Touchy-touchy the TouchPad, or
Press "The Any Key", & 
All 3 displays would wake back up as instructed.

You could attempt something similar, by leaving a terminal open with "xset dpms
force on" command left as the next thing you execute, wait for the display(s)
to go standby / suspend / off, wait another handful of seconds, press "enter"
key to execute the command. Then do the same with the previously mentioned: 
"xset dpms force off; sleep 5; xset dpms force on" as a useful test as well.

If some of these tests succeed, figure out a way to execute -- with something
like a keybinding combo or  devd(8) --  a shell script that executes when a
change in the lid switch is detected. See example:

# Notify lid close/open events.
notify 10 {
  match  "system"    "ACPI";
  match  "subsystem" "Lid";
  action "/etc/acpi/lid.sh $notify";
};

From:  https://hauweele.net/~gawen/blog/?p=1420

Where you change the line:  "  action "/etc/acpi/lid.sh $notify";  " to an
executable shell script you write yourself (example: 
/home/yourusername/wakeUP.sh), containing the command:  "xset dpms force off;
sleep 5; xset dpms force on".

The legendary Vermaden also offers very useful tips & script examples to
accomplish similar things:  
https://vermaden.wordpress.com/2018/11/28/the-power-to-serve-freebsd-power-management/

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