I tracked this down to a bunch of edge-cases in Fujitsu's UEFI implementation, the Linux kernel, and efibootmgr.
The method of restoring access by doing a CMOS-reset (shorting the CL1_CL2 test point) and flashing the BIOS [1] was already known, but I also created a tool [2] that is supposed to restore all relevant settings from within a running Linux installation. Please do make note of the list of supported configurations and of the disclaimer. A proper kernel-side fix is pending, but it will take some time to land in mainline Linux, linux-stable and the Ubuntu kernel tree respectively. [1] https://support.ts.fujitsu.com/ [2] https://github.com/timschumi/ah532-biostools/ -- 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/1273060 Title: [Fujitsu LIFEBOOK LH532 (UMA)] Ubuntu EFI install locks out firmware access Status in linux package in Ubuntu: Expired Bug description: :~$ apt-cache policy grub-efi-amd64 grub-efi-amd64: Installed: 2.00-22 Candidate: 2.00-22 EFI installation of Ubuntu clears out the boot entries in firmware leaving user with no option but boot Ubuntu. Pressing (F2) to enter BIOS Setup has no effect as does pressing (F12) for Boot Order. The only way to get back firmware access is to flash the bios using manufacturer provided utilities. Unfortunately Fujitsu doesn't provide a BIOS flash utility for Linux/Ubuntu. It is to be noted that installed Windows in EFI mode on the same system does not clear out firmware access but just adds the 'Windows Boot Loader' entry at the top of the boot sequence. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-5-generic 3.13.0-5.20 [modified: boot/vmlinuz-3.13.0-5-generic] ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0 Uname: Linux 3.13.0-5-generic x86_64 ApportVersion: 2.13.1-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: satish 1852 F.... pulseaudio CurrentDesktop: Unity Date: Mon Jan 27 11:06:37 2014 HibernationDevice: RESUME=UUID=c73dc7d0-4253-44fa-9589-d8c91c9cac13 InstallationDate: Installed on 2014-01-26 (0 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140124) MachineType: FUJITSU LIFEBOOK LH532 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-5-generic.efi.signed root=UUID=efd53305-1eac-42ba-b3f9-828b72cb5560 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-5-generic N/A linux-backports-modules-3.13.0-5-generic N/A linux-firmware 1.122 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/24/2012 dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd. dmi.bios.version: Version 1.10 dmi.board.name: FJNBB1E dmi.board.vendor: FUJITSU dmi.chassis.type: 10 dmi.chassis.vendor: FUJITSU dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.10:bd05/24/2012:svnFUJITSU:pnLIFEBOOKLH532:pvr:rvnFUJITSU:rnFJNBB1E:rvr:cvnFUJITSU:ct10:cvr: dmi.product.name: LIFEBOOK LH532 dmi.sys.vendor: FUJITSU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1273060/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
