Doug Schaapveld, as per http://support.lenovo.com/en_US/downloads/default.page? an update is available for your BIOS (1.43). If you update to this, does it change anything?
If not, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date Thank you for your understanding. ** Tags added: bios-outdated-1.57 needs-upstream-testing regression- update ** Summary changed: - Lenovo ThinkPad T520 4940-49U won't boot with 3.5.0-27 + [Lenovo ThinkPad T520 4240] won't boot with 3.5.0-27 ** Tags removed: bios-outdated-1.57 ** Tags added: bios-outdated-1.43 ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1169959 Title: [Lenovo ThinkPad T520 4240] won't boot with 3.5.0-27 Status in “linux” package in Ubuntu: Incomplete Bug description: After updating to kernel linux-image-3.5.0-27-generic a week or two ago, my T520 4940-49U won't boot. After 1-2 seconds, the screen goes blank (dark - backlight off) and the laptop stops responding. Alt-F2, etc does not cause any change. Alt-SysRq-B will reboot, but nothing else has any effect. The hard disk light is not on/blinking. Removing the "quiet splash $vt_handoff" options from the grub boot options does NOT help; also adding "nofb" does NOT help; also adding "init=/bin/bash" does NOT help. Booting recovery mode for 3.5.0-27 DOES work. Booting 3.5.0-26 in standard (non-recovery mode) DOES work. I'm unable to capture any output from a failed boot, so not sure how to troubleshoot further. Attached data was captured while running 3.5.0-26 (NOT the problem kernel). ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: linux-image-3.5.0-26-generic 3.5.0-26.42 ProcVersionSignature: Ubuntu 3.5.0-26.42-generic 3.5.7.6 Uname: Linux 3.5.0-26-generic x86_64 ApportVersion: 2.6.1-0ubuntu10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: dschaapveld 2764 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory: 'iw' CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied Date: Wed Apr 17 08:19:50 2013 InstallationDate: Installed on 2012-06-12 (308 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: LENOVO 424049U MarkForUpload: True ProcFB: 0 nouveaufb 1 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-26-generic root=/dev/mapper/VG298-root ro quiet splash SourcePackage: linux UpgradeStatus: Upgraded to quantal on 2012-11-02 (166 days ago) WifiSyslog: dmi.bios.date: 12/06/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 8AET56WW (1.36 ) dmi.board.asset.tag: Not Available dmi.board.name: 424049U 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:bvr8AET56WW(1.36):bd12/06/2011:svnLENOVO:pn424049U:pvrThinkPadT520:rvnLENOVO:rn424049U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 424049U dmi.product.version: ThinkPad T520 dmi.sys.vendor: LENOVO --- ApportVersion: 2.6.1-0ubuntu10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: dschaapveld 2764 F.... pulseaudio /dev/snd/controlC0: dschaapveld 2764 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied dmesg: write failed: Broken pipe DistroRelease: Ubuntu 12.10 InstallationDate: Installed on 2012-06-12 (310 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: LENOVO 424049U MarkForUpload: True Package: linux (not installed) ProcFB: 0 nouveaufb 1 inteldrmfb 2 udldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.5.0-26-generic root=/dev/mapper/VG298-root ro quiet splash ProcVersionSignature: Ubuntu 3.5.0-26.42-generic 3.5.7.6 Tags: quantal running-unity Uname: Linux 3.5.0-26-generic x86_64 UpgradeStatus: Upgraded to quantal on 2012-11-02 (167 days ago) UserGroups: dialout libvirtd rancid sudo WifiSyslog: dmi.bios.date: 12/06/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 8AET56WW (1.36 ) dmi.board.asset.tag: Not Available dmi.board.name: 424049U 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:bvr8AET56WW(1.36):bd12/06/2011:svnLENOVO:pn424049U:pvrThinkPadT520:rvnLENOVO:rn424049U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 424049U dmi.product.version: ThinkPad T520 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1169959/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp