I've captured a log where it doesn't fail. The difference is a single error message. In failing sessions there is an additional "Failed to configure CRTC..." which is not seen here:
xfce4-settings(displays): UPower lid event received (closed -> open). xfce4-settings(displays): Toggling internal output LVDS. xfce4-settings(displays): CRTC 79 assigned to LVDS. xfce4-settings(displays): CRTC 79, output list[0] -> 82. xfce4-settings(displays): LVDS will be re-enabled. xfce4-settings(displays): Normalized CRTC 79: size=1280x800, pos=0x0. xfce4-settings(displays): min_h = 200, min_w = 320, max_h = 4096, max_w = 4096, prev_h = 800, prev_w = 1280, prev_hmm = 211, prev_wmm = 338, h = 0, w = 0, hmm = 0, wmm = 0. xfce4-settings(displays): Configuring CRTC 79. xfce4-settings(displays): Applying changes to CRTC 79. xfce4-settings(displays): Applying CRTC 79 Transform: x=0.000000 y=0.000000, filter=bilinear. xfce4-settings(displays): Configuring CRTC 80. (xfsettingsd:7482): xfsettingsd-CRITICAL **: 14:49:59.549: Failed to apply display settings xfce4-settings(displays): RRScreenChangeNotify event received. xfce4-settings(displays): Refreshing RandR cache. xfce4-settings(displays): Detected CRTC 79. xfce4-settings(displays): Detected CRTC 80. xfce4-settings(displays): Detected output 82 LVDS. xfce4-settings(displays): Noutput: before = 1, after = 1. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1759950 Title: Lid-close suspend: blank screen when switching to user session Status in Light-Locker: New Status in Xfce4 Power Manager: Confirmed Status in light-locker package in Ubuntu: Incomplete Status in systemd package in Ubuntu: New Status in xfce4-power-manager package in Ubuntu: Confirmed Status in xfce4-settings package in Ubuntu: New Status in xubuntu-default-settings package in Ubuntu: New Bug description: I'm currently testing Xubuntu 18.04 after a do-release-upgrade from 16.04. I discovered a very weird issue. When doing S3 sleep via closing the lid, on resume the lock screen appears, I authenticate, but as soon as it switches to the user session the screen goes blank - not even a backlight. Switching to other ttys works and they display correctly but the GUI user session remains blank. If the system is manually suspended (not using the lid), then resumed either by opening the lid or pressing the power button, the GUI user session is fine. I narrowed it down to xfce4-power-manager and discovered disabling the lock-screen cured the issue. I cloned the repository and reviewed commits between 1.7 and 1.8. Fortunately there aren't many. Looking at 6365683 "Proper exit status for light-locker-command" I suspected the change in the SetActive return value, and reverted it. After a build/install cycle I've found the system now behaves correctly so I think the change should be reverted. I've created an issue upstream for this at https://github.com/the-cavalry/light-locker/issues/108 To manage notifications about this bug go to: https://bugs.launchpad.net/light-locker/+bug/1759950/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
