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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]

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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] 1 points 8 months ago (1 children)

It is not likely to be XFCE specific.

Make sure you have properly configured swap space and its size is larger than RAM. Because this will be the easiest cause. Some people stated as much as twice the ram size.

There’s a wiki page on arch wiki trying to help with this issue. In short, prepare for a lot of work and good luck.

[–] Shareni 1 points 8 months ago

It is not likely to be XFCE specific.

It seems to be, or it's related to my xfce+I3 setup. I tried starting the xfce power manager in i3 and it woke up correctly 10 times in a row. And executing an xrandr config turns the monitor back on.

AFAIK swap is only used for hibernation. Suspend keeps ram (and a single core/thread?) powered, so it's not needed.