Public bug reported: I have my MacBook Air 5,2 set to * Security & Privacy > Prompt for password upon Waking from suspend and Returning from blank screen * Power > When the lid is closed Do nothing.
When I close the lid, the backlight immediately turns off (good!) then after a few seconds it turns on again (noo!) and stays on for around 20 seconds, then the backlight turns off for about 6 seconds, and it continues to cycle on and off. If the brightness is up high it gets very warm and wastes the battery. What should happen is the backlight should stay off while the lid is closed. I followed the suggestions at http://superuser.com/questions/462781/how- to-monitor-acpi-events-and-keypresses-in-linux to monitor ACPI events and all I see are two events: acpid: received input layer event "button/lid LID close" acpid: rule from 1286[0:0] matched acpid: notifying client 1286[0:0] acpid: 1 total rule matched acpid: completed input layer event "button/lid LID close" acpid: received input layer event "button/lid LID open" acpid: rule from 1286[0:0] matched acpid: notifying client 1286[0:0] acpid: 1 total rule matched acpid: completed input layer event "button/lid LID open" PID 1286 is lightdm, so I'm filing this against lightdm. Maybe when it activates it turns the backlight back on. (But then why does the backlight turn off again?) I would love to know what else to debug to see what's turning the screen on and off. Xorg.0.log has [ 10.496] (II) config/udev: Adding input device Lid Switch (/dev/input/event0) [ 10.496] (II) No input driver specified, ignoring this device. [ 10.496] (II) This device may have been added with another device file. and then no more mention of lid. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: lightdm 1.8.5-0ubuntu1 ProcVersionSignature: Ubuntu 3.11.0-19.33-generic 3.11.10.5 Uname: Linux 3.11.0-19-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 Date: Wed Apr 16 18:46:34 2014 InstallationDate: Installed on 2012-07-16 (639 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) LightdmConfig: [SeatDefaults] user-session=ubuntu greeter-session=unity-greeter MarkForUpload: True SourcePackage: lightdm UpgradeStatus: Upgraded to saucy on 2013-10-25 (173 days ago) ** Affects: lightdm (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug saucy -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1308818 Title: MacBook Air display cycles on and off after lid close To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1308818/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
