Dear Steve, in the mean time I tried a new install, an ugrade to the latest version, and boot-repair. Nothing changed.
$ sudo efibootmgr BootCurrent: 0001 Timeout: 2 seconds BootOrder: 0004,2002,0000,2001 Boot0000* Windows Boot Manager Boot0001* Unknown Device: Boot0002* ATAPI CDROM: MATSHITA DVD-RAM UJ8HC Boot0003* Unknown Device: Boot0004* ubuntu Boot0005* Unknown Device: Boot2001* EFI USB Device Boot2002* EFI DVD/CDROM Boot2003* EFI Network Best regards, Peter -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1437797 Title: I can't boot ubuntu after installing it dual-boot from kubuntu 14.10 CD prallel to windows 8.1, UEFI secure boot, on an Acer Aspire E15. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1437797/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs