Package: lightdm Version: 1.26.0-2 Followup-For: Bug #908329 I can confirm that bug on my laptop, but not only after screen lock.
After closing and then opening the lid screen is turning on, but nothing is displayed except mouse pointer. If I switch virt console to text and back to gui (i.e. tty1 -> tty7) all displaying correctly. In mate-power-manager (using mate 1.20.3) "When laptop lid is closed" I was selected "Blank screen", but when I select "Do nothing", problem disappears. -- System Information: Debian Release: buster/sid APT prefers testing APT policy: (500, 'testing') Architecture: i386 (i686) Kernel: Linux 4.18.0-1-686-pae (SMP w/2 CPU cores) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages lightdm depends on: ii adduser 3.118 ii dbus 1.12.10-1 ii debconf [debconf-2.0] 1.5.69 ii libaudit1 1:2.8.4-2 ii libc6 2.27-6 ii libgcrypt20 1.8.3-1 ii libglib2.0-0 2.58.1-2 ii libpam-systemd 239-10 ii libpam0g 1.1.8-3.8 ii libxcb1 1.13-3 ii libxdmcp6 1:1.1.2-3 ii lightdm-gtk-greeter [lightdm-greeter] 2.0.5-1 ii lsb-base 9.20170808 Versions of packages lightdm recommends: ii xserver-xorg 1:7.7+19 Versions of packages lightdm suggests: ii accountsservice 0.6.45-1 ii upower 0.99.8-2 pn xserver-xephyr <none> -- debconf information: lightdm/daemon_name: /usr/sbin/lightdm * shared/default-x-display-manager: lightdm
