I've tested with three machine states and dumped the partitions and efibootmgr -v for each.
1. Windows 8.1 x64 installed (boots correctly) 2. Xubuntu 14.04 2014-04-08 daily build after installation but still in live usb 3. Xubuntu 14.04 2014-04-08 daily build after reboot # With Windows 8.1 x64 installed root@xubuntu:~# parted -l Model: ATA ST1000DM003-1CH1 (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 1049kB 316MB 315MB ntfs Basic data partition hidden, diag 2 316MB 420MB 105MB fat32 EFI system partition boot 3 420MB 555MB 134MB Microsoft reserved partition msftres 4 555MB 1000GB 1000GB ntfs Basic data partition msftdata root@xubuntu:~# efibootmgr -v BootCurrent: 0007 Timeout: 1 seconds BootOrder: 0007,0004,0001,0002 Boot0001* UEFI: IP4 Realtek PCIe GBE Family Controller ACPI(a0341d0,0)PCI(1c,4)PCI(0,0)MAC(7427eace3ae7,0)IPv4(0.0.0.0:0<->0.0.0.0:0,0, 0AMBO Boot0002* UEFI: IP6 Realtek PCIe GBE Family Controller ACPI(a0341d0,0)PCI(1c,4)PCI(0,0)MAC(7427eace3ae7,0)030d3c000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000AMBO Boot0004* Windows Boot Manager HD(2,96800,32000,5943a605-c575-430d-9636-6f6d7335c676)File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...3................ Boot0007* UEFI: KingstonDataTraveler 2.0PMAP ACPI(a0341d0,0)PCI(1d,0)USB(1,0)USB(1,0)HD(1,1f80,1d11bc0,0004ce4a)AMBO # With Xubuntu 14.04 2014-04-08 daily build installed (still in live installer): root@xubuntu:~# parted -l Model: ATA ST1000DM003-1CH1 (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 1049kB 512MB 511MB fat32 boot 2 512MB 992GB 991GB ext4 3 992GB 1000GB 8475MB linux-swap(v1) root@xubuntu:~# efibootmgr -v BootCurrent: 0007 Timeout: 1 seconds BootOrder: 0000,0007,0004,0001,0002 Boot0000* ubuntu HD(1,800,f3800,6f839682-f2f0-4144-8f2d-b9b6b92d53c3)File(\EFI\ubuntu\shimx64.efi) Boot0001* UEFI: IP4 Realtek PCIe GBE Family Controller ACPI(a0341d0,0)PCI(1c,4)PCI(0,0)MAC(7427eace3ae7,0)IPv4(0.0.0.0:0<->0.0.0.0:0,0, 0AMBO Boot0002* UEFI: IP6 Realtek PCIe GBE Family Controller ACPI(a0341d0,0)PCI(1c,4)PCI(0,0)MAC(7427eace3ae7,0)030d3c000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000AMBO Boot0004* Windows Boot Manager HD(2,96800,32000,5943a605-c575-430d-9636-6f6d7335c676)File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...3................ Boot0007* UEFI: KingstonDataTraveler 2.0PMAP ACPI(a0341d0,0)PCI(1d,0)USB(1,0)USB(1,0)HD(1,1f80,1d11bc0,0004ce4a)AMBO # With Xubuntu 14.04 2014-04-08 daily build installed (after rebooting the system): root@xubuntu:~# parted -l Model: ATA ST1000DM003-1CH1 (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 1049kB 512MB 511MB fat32 boot 2 512MB 992GB 991GB ext4 3 992GB 1000GB 8475MB linux-swap(v1) root@xubuntu:~# efibootmgr -v BootCurrent: 0009 Timeout: 1 seconds BootOrder: 0009,0000,0008,0001,0002 Boot0000* ubuntu Vendor(99e275e7-75a0-4b37-a2e6-c5385e6c00cb,) Boot0001* UEFI: IP4 Realtek PCIe GBE Family Controller ACPI(a0341d0,0)PCI(1c,4)PCI(0,0)MAC(7427eace3ae7,0)IPv4(0.0.0.0:0<->0.0.0.0:0,0, 0AMBO Boot0002* UEFI: IP6 Realtek PCIe GBE Family Controller ACPI(a0341d0,0)PCI(1c,4)PCI(0,0)MAC(7427eace3ae7,0)030d3c000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000AMBO Boot0008* ubuntu Vendor(99e275e7-75a0-4b37-a2e6-c5385e6c00cb,) Boot0009* UEFI: KingstonDataTraveler 2.0PMAP ACPI(a0341d0,0)PCI(1d,0)USB(1,0)USB(1,0)HD(1,1f80,1d11bc0,0004ce4a)AMBO # Additional output from gdisk, confirmed that this matches the "before first reboot" boot descriptor root@xubuntu:~# gdisk -l Disk /dev/sda: 1953525168 sectors, 931.5 GiB Logical sector size: 512 bytes Disk identifier (GUID): 604A7239-FB6D-4B7C-9AFB-6655B7C45D8C Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1953525134 Partitions will be aligned on 2048-sector boundaries Total free space is 3437 sectors (1.7 MiB) Number Start (sector) End (sector) Size Code Name 1 2048 999423 487.0 MiB EF00 2 999424 1936971775 923.1 GiB 8300 3 1936971776 1953523711 7.9 GiB 8200 # gdisk efi partition detailed info Command (? for help): i Partition number (1-3): 1 Partition GUID code: C12A7328-F81F-11D2-BA4B-00A0C93EC93B (EFI System) Partition unique GUID: 6F839682-F2F0-4144-8F2D-B9B6B92D53C3 First sector: 2048 (at 1024.0 KiB) Last sector: 999423 (at 488.0 MiB) Partition size: 997376 sectors (487.0 MiB) Attribute flags: 0000000000000000 Partition name: '' -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1302939 Title: Installing Ubuntu 14.04 on Lenovo H520 leads to unbootable system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1302939/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs