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(partially solved, will update when completed) Please help with an xfce/powerup bug: black screen after suspend/hibernate (self.linux)

submitted 8 months ago* (last edited 8 months ago) by Shareni to c/[email protected]

22 comments fedilink hide all child comments

MX Linux, Xfce 4.18

Closing the laptop lid suspends the system, opening it resumes it, but the screen is black. I'm guessing it's related to powerup because suspending through the logout menu and systemctl suspend both work as expected. When it's black, switching to a different tty works, as well as C-M-Backspace to logout.

Same results with both lightdm and sddm, when replacing suspend with hibernate, and I've tried a few solutions like disabling lock on sleep.

Seems like this issue has been around for years, but had a whole bunch of different causes since every other thread has a different solution.

XFSETTINGSD_DEBUG=1 xfsettingsd --replace --no-daemon > /tmp/xf.log 2>&1

ps -ef | grep -E 'screen|lock'

xfconf-query -c xfce4-power-manager -lv

dmesg, cleared it before trying to suspend

updates:

I'm not seeing a black screen, instead it turns on the display and then turns it off.

Additionally, I tried closing and opening the lid a few times, and it woke up correctly.

I tried it in i3wm with the xfce power manager to suspend after closing the lid. It woke up correctly 10 times in a row.

Solution: start an xrandr config and the monitor turns back on.

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[–] [email protected] 3 points 8 months ago* (last edited 8 months ago) (1 children)

It actually starts, and then turns off. I didn’t notice it before you drew my attention.

That does sound like DPMS ("vesa display power management signaling") shenanigans though.

Maybe you can disable XFCE's display power management stuff completely? Systemd's logind (/etc/systemd/logind.conf) can do (and does by default I think) suspend on lid-close without any window manager involvement at all, works fine with i3 here. So disabling XFCE's stuff probably "only" messes with your monitor not going standby after a while, and you can maybe use xset or xscreensaver and set this by hand (after making sure it's actually properly disabled in XFCE, so XFCE doesn't override that stuff).

Found this about how to stop xfce4-power-manager and disable DPMS:

xfce4-power-manager -q
xset -dpms

Try doing that and see if lid close works afterwards.

[–] Shareni 3 points 8 months ago* (last edited 8 months ago) (1 children)

I found a different solution: trigger an xrandr config. I'm leaving automating it for tomorrow.

The funniest thing is that I was trying to help out some other lemmy user fix their own xrandr issues, and accidentally came across a thread mentioning it when I went back to fixing my own.

Thanks for the help anyways

[–] [email protected] 2 points 8 months ago (1 children)

OK glad you found some workaround!

[–] Shareni 2 points 8 months ago

I found it because you pointed out the monitor might be turning off. Changed search terms and found the recommendation in a Reddit thread. The full solution wasn't great though.