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Bug#991788: xfce4-settings: black screen after suspend when laptop lid is closed and re-opened

This is on the 5.10.0-8 kernel on Debian Bullseye with Nvidia graphics with the proprietary driver installed. I am using light-locker 1.8.0 and upower 0.99.11-2 with the desktop configured to suspend my computer on lid closures. This happens whether or not the laptop is plugged in and is a confirmed bug upstream with how the upower support is implemented.

Aug 3, 2021, 05:28 by dilinger@queued.net:
On Mon, 2 Aug 2021 02:08:09 +0200 (CEST) truetechie@tutanota.com wrote:
Package: xfce4-settings
Version: 4.16.0-1
Severity: critical
On Debian and, by extension, Ubuntu, when suspending a laptop via closing the lid on XFCE, the screen stays black after resuming from suspend. The only way to "fix" the system is to blindly type "xrandr --auto" into a terminal or switch to a TTY and restart X.

As an xfce user, I haven't experienced this problem. What graphics hardware and kernel are you seeing this with? Is this on battery or when plugged in? Are you using light-locker (and if so, what version)? Do you have upower installed (and if so, what version)? What is xfce4 configured to do on a lid close (xfconf-query --verbose --list -c xfce4-power-manager)?

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