Public bug reported: This issue suddenly started yesterday, even though I am not aware of any configuration changes that could have been made in the past few days, so I'm not entirely sure there's no hardware problem involved. Anyway, I put another hard drive into the system and tested this with a fresh Windows 7 install, where the system does NOT show the behavior in question.
The display behaves normally until the kernel is loaded (in BIOS or grub). As soon as the console switches to framebuffer, the display starts to turn on and back off incessantly. When I kill acpid and do "cat /proc/acpi/event", this is what I see: ... button/lid LID 00000080 0000000f button/lid LID 00000080 00000010 button/lid LID 00000080 00000011 button/lid LID 00000080 00000012 button/lid LID 00000080 00000013 ... with the lines appearing synchronously to the blinking of the LCD. When I attach an external monitor, the monitor and the LCD switch on and off at the same times. By "while [ 1 ]; do cat /proc/acpi/button/lid/LID/state ; done" I see that ACPI seems to think that the lid is opening and closing all of the time. When I add "vga=normal nomodeset" to the grub entry to disable the framebuffer, this does not occur. However, standby mody doesn't work properly any more, which it did before yesterday. Sporadically it works, but most of the time the machine seems not to wake up again - either the screens stays black, or I only get a blinking cursor and no virtual consoles or X.org display. A few times gdm seems to have been completely restarted, and only once did I get to the point where I could unlock the previously running session. Additionally, changing from the non-framebuffer virtual console to the graphical console with Ctrl-Alt-F7 seems to trigger an event which makes the system try to go into Standby mode, which fails due to an error message saying "Access denied". I tried the above with the mainline build linux- image-2.6.35-02063504-generic_2.6.35-02063504.201008271919_i386. No difference. The machine in question is a Lenovo Thinkpad SL510, Type 2847, Model 7MG. I already installed the latest BIOS version, which helped absolutely nothing. ProblemType: Bug DistroRelease: Ubuntu 10.04 Package: linux-image (not installed) Regression: No Reproducible: Yes ProcVersionSignature: Ubuntu 2.6.32-24.42-generic 2.6.32.15+drm33.5 Uname: Linux 2.6.32-24-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: user 2918 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf2a00000 irq 22' Mixer name : 'Realtek ALC269' Components : 'HDA:10ec0269,17aa212c,00100004 HDA:80862802,80860101,00100000' Controls : 16 Simple ctrls : 8 Date: Tue Sep 14 03:57:09 2010 HibernationDevice: RESUME=UUID=abd6a1ce-0678-498f-991e-c8995a668a56 InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1) MachineType: LENOVO 28477MG ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=5528c753-28e3-4ae1-b58e-253ec5139d22 ro quiet splash vga=normal nomodeset ProcEnviron: LANG=en_US.utf8 SHELL=/bin/bash RelatedPackageVersions: linux-firmware 1.34.1 SourcePackage: linux dmi.bios.date: 08/06/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 6JET82WW (1.40 ) dmi.board.name: 28477MG dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6JET82WW(1.40):bd08/06/2010:svnLENOVO:pn28477MG:pvrThinkPadSL510:rvnLENOVO:rn28477MG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 28477MG dmi.product.version: ThinkPad SL510 dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 lucid needs-upstream-testing -- Thinkpad SL510 LCD switches on/off every second due to wrong button/lid events https://bugs.launchpad.net/bugs/637729 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs