I have an odd problem that I have never come across before. First off, the hardware:
HP x360 Spectre Kaby Lake (i7-7500u) Ubuntu 17.10 64bit
The laptop dual boots between Windows and Ubuntu. In setup, I have Ubuntu as the default so I could choose between Windows or Ubuntu from grub. However, when I turn on my laptop, or reboot, the system goes to Grub as expected, but then freezes. The countdown timer stays at 10 seconds and it takes no input.
The weird part is, if I press F9 to bring up the UEFI boot menu, and select the first entry (Ubuntu), grub loads and works fine. I can't figure out what the difference is to have setup boot the Ubuntu EFI entry without my intervention compared to me selecting it from F9 boot menu.
Update: Adding additional info
Files under /boot/efi:
root@localhost:/boot/efi# find .
.
./EFI
./EFI/Microsoft
./EFI/Microsoft/Boot
./EFI/Microsoft/Boot/bg-BG
./EFI/Microsoft/Boot/bg-BG/bootmgfw.efi.mui
./EFI/Microsoft/Boot/bg-BG/bootmgr.efi.mui
./EFI/Microsoft/Boot/boot.stl
./EFI/Microsoft/Boot/bootmgfw.efi
./EFI/Microsoft/Boot/bootmgr.efi
./EFI/Microsoft/Boot/cs-CZ
./EFI/Microsoft/Boot/cs-CZ/bootmgr.efi.mui
./EFI/Microsoft/Boot/cs-CZ/memtest.efi.mui
./EFI/Microsoft/Boot/cs-CZ/bootmgfw.efi.mui
./EFI/Microsoft/Boot/da-DK
./EFI/Microsoft/Boot/da-DK/bootmgr.efi.mui
./EFI/Microsoft/Boot/da-DK/memtest.efi.mui
./EFI/Microsoft/Boot/da-DK/bootmgfw.efi.mui
./EFI/Microsoft/Boot/de-DE
./EFI/Microsoft/Boot/de-DE/bootmgr.efi.mui
./EFI/Microsoft/Boot/de-DE/memtest.efi.mui
./EFI/Microsoft/Boot/de-DE/bootmgfw.efi.mui
./EFI/Microsoft/Boot/el-GR
./EFI/Microsoft/Boot/el-GR/bootmgr.efi.mui
./EFI/Microsoft/Boot/el-GR/memtest.efi.mui
./EFI/Microsoft/Boot/el-GR/bootmgfw.efi.mui
./EFI/Microsoft/Boot/en-GB
./EFI/Microsoft/Boot/en-GB/bootmgfw.efi.mui
./EFI/Microsoft/Boot/en-GB/bootmgr.efi.mui
./EFI/Microsoft/Boot/en-US
./EFI/Microsoft/Boot/en-US/bootmgr.efi.mui
./EFI/Microsoft/Boot/en-US/memtest.efi.mui
./EFI/Microsoft/Boot/en-US/bootmgfw.efi.mui
./EFI/Microsoft/Boot/es-ES
./EFI/Microsoft/Boot/es-ES/bootmgr.efi.mui
./EFI/Microsoft/Boot/es-ES/memtest.efi.mui
./EFI/Microsoft/Boot/es-ES/bootmgfw.efi.mui
./EFI/Microsoft/Boot/es-MX
./EFI/Microsoft/Boot/es-MX/bootmgfw.efi.mui
./EFI/Microsoft/Boot/es-MX/bootmgr.efi.mui
./EFI/Microsoft/Boot/et-EE
./EFI/Microsoft/Boot/et-EE/bootmgfw.efi.mui
./EFI/Microsoft/Boot/et-EE/bootmgr.efi.mui
./EFI/Microsoft/Boot/fi-FI
./EFI/Microsoft/Boot/fi-FI/bootmgr.efi.mui
./EFI/Microsoft/Boot/fi-FI/memtest.efi.mui
./EFI/Microsoft/Boot/fi-FI/bootmgfw.efi.mui
./EFI/Microsoft/Boot/fr-CA
./EFI/Microsoft/Boot/fr-CA/bootmgfw.efi.mui
./EFI/Microsoft/Boot/fr-CA/bootmgr.efi.mui
./EFI/Microsoft/Boot/fr-FR
./EFI/Microsoft/Boot/fr-FR/bootmgr.efi.mui
./EFI/Microsoft/Boot/fr-FR/memtest.efi.mui
./EFI/Microsoft/Boot/fr-FR/bootmgfw.efi.mui
./EFI/Microsoft/Boot/hr-HR
./EFI/Microsoft/Boot/hr-HR/bootmgfw.efi.mui
./EFI/Microsoft/Boot/hr-HR/bootmgr.efi.mui
./EFI/Microsoft/Boot/hu-HU
./EFI/Microsoft/Boot/hu-HU/bootmgr.efi.mui
./EFI/Microsoft/Boot/hu-HU/memtest.efi.mui
./EFI/Microsoft/Boot/hu-HU/bootmgfw.efi.mui
./EFI/Microsoft/Boot/it-IT
./EFI/Microsoft/Boot/it-IT/bootmgr.efi.mui
./EFI/Microsoft/Boot/it-IT/memtest.efi.mui
./EFI/Microsoft/Boot/it-IT/bootmgfw.efi.mui
./EFI/Microsoft/Boot/ja-JP
./EFI/Microsoft/Boot/ja-JP/bootmgr.efi.mui
./EFI/Microsoft/Boot/ja-JP/memtest.efi.mui
./EFI/Microsoft/Boot/ja-JP/bootmgfw.efi.mui
./EFI/Microsoft/Boot/ko-KR
./EFI/Microsoft/Boot/ko-KR/bootmgr.efi.mui
./EFI/Microsoft/Boot/ko-KR/memtest.efi.mui
./EFI/Microsoft/Boot/ko-KR/bootmgfw.efi.mui
./EFI/Microsoft/Boot/lt-LT
./EFI/Microsoft/Boot/lt-LT/bootmgfw.efi.mui
./EFI/Microsoft/Boot/lt-LT/bootmgr.efi.mui
./EFI/Microsoft/Boot/lv-LV
./EFI/Microsoft/Boot/lv-LV/bootmgfw.efi.mui
./EFI/Microsoft/Boot/lv-LV/bootmgr.efi.mui
./EFI/Microsoft/Boot/memtest.efi
./EFI/Microsoft/Boot/nb-NO
./EFI/Microsoft/Boot/nb-NO/bootmgr.efi.mui
./EFI/Microsoft/Boot/nb-NO/memtest.efi.mui
./EFI/Microsoft/Boot/nb-NO/bootmgfw.efi.mui
./EFI/Microsoft/Boot/nl-NL
./EFI/Microsoft/Boot/nl-NL/bootmgr.efi.mui
./EFI/Microsoft/Boot/nl-NL/memtest.efi.mui
./EFI/Microsoft/Boot/nl-NL/bootmgfw.efi.mui
./EFI/Microsoft/Boot/pl-PL
./EFI/Microsoft/Boot/pl-PL/bootmgr.efi.mui
./EFI/Microsoft/Boot/pl-PL/memtest.efi.mui
./EFI/Microsoft/Boot/pl-PL/bootmgfw.efi.mui
./EFI/Microsoft/Boot/pt-BR
./EFI/Microsoft/Boot/pt-BR/bootmgr.efi.mui
./EFI/Microsoft/Boot/pt-BR/memtest.efi.mui
./EFI/Microsoft/Boot/pt-BR/bootmgfw.efi.mui
./EFI/Microsoft/Boot/pt-PT
./EFI/Microsoft/Boot/pt-PT/bootmgr.efi.mui
./EFI/Microsoft/Boot/pt-PT/memtest.efi.mui
./EFI/Microsoft/Boot/pt-PT/bootmgfw.efi.mui
./EFI/Microsoft/Boot/qps-ploc
./EFI/Microsoft/Boot/qps-ploc/memtest.efi.mui
./EFI/Microsoft/Boot/ro-RO
./EFI/Microsoft/Boot/ro-RO/bootmgfw.efi.mui
./EFI/Microsoft/Boot/ro-RO/bootmgr.efi.mui
./EFI/Microsoft/Boot/ru-RU
./EFI/Microsoft/Boot/ru-RU/bootmgr.efi.mui
./EFI/Microsoft/Boot/ru-RU/memtest.efi.mui
./EFI/Microsoft/Boot/ru-RU/bootmgfw.efi.mui
./EFI/Microsoft/Boot/sk-SK
./EFI/Microsoft/Boot/sk-SK/bootmgfw.efi.mui
./EFI/Microsoft/Boot/sk-SK/bootmgr.efi.mui
./EFI/Microsoft/Boot/sl-SI
./EFI/Microsoft/Boot/sl-SI/bootmgfw.efi.mui
./EFI/Microsoft/Boot/sl-SI/bootmgr.efi.mui
./EFI/Microsoft/Boot/sr-Latn-CS
./EFI/Microsoft/Boot/sr-Latn-CS/memtest.efi.mui
./EFI/Microsoft/Boot/sr-Latn-RS
./EFI/Microsoft/Boot/sr-Latn-RS/bootmgfw.efi.mui
./EFI/Microsoft/Boot/sr-Latn-RS/bootmgr.efi.mui
./EFI/Microsoft/Boot/sv-SE
./EFI/Microsoft/Boot/sv-SE/bootmgr.efi.mui
./EFI/Microsoft/Boot/sv-SE/memtest.efi.mui
./EFI/Microsoft/Boot/sv-SE/bootmgfw.efi.mui
./EFI/Microsoft/Boot/tr-TR
./EFI/Microsoft/Boot/tr-TR/bootmgr.efi.mui
./EFI/Microsoft/Boot/tr-TR/memtest.efi.mui
./EFI/Microsoft/Boot/tr-TR/bootmgfw.efi.mui
./EFI/Microsoft/Boot/uk-UA
./EFI/Microsoft/Boot/uk-UA/bootmgfw.efi.mui
./EFI/Microsoft/Boot/uk-UA/bootmgr.efi.mui
./EFI/Microsoft/Boot/zh-CN
./EFI/Microsoft/Boot/zh-CN/bootmgr.efi.mui
./EFI/Microsoft/Boot/zh-CN/memtest.efi.mui
./EFI/Microsoft/Boot/zh-CN/bootmgfw.efi.mui
./EFI/Microsoft/Boot/zh-HK
./EFI/Microsoft/Boot/zh-HK/bootmgr.efi.mui
./EFI/Microsoft/Boot/zh-HK/memtest.efi.mui
./EFI/Microsoft/Boot/zh-HK/bootmgfw.efi.mui
./EFI/Microsoft/Boot/zh-TW
./EFI/Microsoft/Boot/zh-TW/bootmgr.efi.mui
./EFI/Microsoft/Boot/zh-TW/memtest.efi.mui
./EFI/Microsoft/Boot/zh-TW/bootmgfw.efi.mui
./EFI/Microsoft/Boot/BOOTSTAT.DAT
./EFI/Microsoft/Boot/Fonts
./EFI/Microsoft/Boot/Fonts/chs_boot.ttf
./EFI/Microsoft/Boot/Fonts/cht_boot.ttf
./EFI/Microsoft/Boot/Fonts/jpn_boot.ttf
./EFI/Microsoft/Boot/Fonts/kor_boot.ttf
./EFI/Microsoft/Boot/Fonts/malgunn_boot.ttf
./EFI/Microsoft/Boot/Fonts/malgun_boot.ttf
./EFI/Microsoft/Boot/Fonts/meiryon_boot.ttf
./EFI/Microsoft/Boot/Fonts/meiryo_boot.ttf
./EFI/Microsoft/Boot/Fonts/msjhn_boot.ttf
./EFI/Microsoft/Boot/Fonts/msjh_boot.ttf
./EFI/Microsoft/Boot/Fonts/msyhn_boot.ttf
./EFI/Microsoft/Boot/Fonts/msyh_boot.ttf
./EFI/Microsoft/Boot/Fonts/segmono_boot.ttf
./EFI/Microsoft/Boot/Fonts/segoen_slboot.ttf
./EFI/Microsoft/Boot/Fonts/segoe_slboot.ttf
./EFI/Microsoft/Boot/Fonts/wgl4_boot.ttf
./EFI/Microsoft/Boot/Resources
./EFI/Microsoft/Boot/Resources/bootres.dll
./EFI/Microsoft/Boot/Resources/en-US
./EFI/Microsoft/Boot/Resources/en-US/bootres.dll.mui
./EFI/Microsoft/Boot/Resources/fr-FR
./EFI/Microsoft/Boot/Resources/fr-FR/bootres.dll.mui
./EFI/Microsoft/Boot/kd_02_10df.dll
./EFI/Microsoft/Boot/kd_02_10ec.dll
./EFI/Microsoft/Boot/kd_02_1137.dll
./EFI/Microsoft/Boot/kd_02_14e4.dll
./EFI/Microsoft/Boot/kd_02_15b3.dll
./EFI/Microsoft/Boot/kd_02_1969.dll
./EFI/Microsoft/Boot/kd_02_19a2.dll
./EFI/Microsoft/Boot/kd_02_8086.dll
./EFI/Microsoft/Boot/kd_07_1415.dll
./EFI/Microsoft/Boot/kd_0C_8086.dll
./EFI/Microsoft/Boot/kdstub.dll
./EFI/Microsoft/Boot/BCD
./EFI/Microsoft/Boot/BCD.LOG
./EFI/Microsoft/Boot/BCD.LOG1
./EFI/Microsoft/Boot/BCD.LOG2
./EFI/Microsoft/Recovery
./EFI/Microsoft/Recovery/BCD
./EFI/Microsoft/Recovery/BCD.LOG
./EFI/Microsoft/Recovery/BCD.LOG1
./EFI/Microsoft/Recovery/BCD.LOG2
./EFI/Boot
./EFI/Boot/bootx64.efi
./EFI/Boot/fbx64.efi
./EFI/HP
./EFI/HP/SystemDiags
./EFI/HP/SystemDiags/CryptRSA.efi
./EFI/HP/SystemDiags/CryptRSA32.efi
./EFI/HP/SystemDiags/SystemDiags.efi
./EFI/HP/SystemDiags/SystemDiags32.efi
./EFI/HP/SystemDiags/SystemDiags.sig
./EFI/HP/SystemDiags/SystemDiags32.sig
./EFI/HP/SystemDiags/SystemDiags.s09
./EFI/HP/SystemDiags/SystemDiags32.s09
./EFI/HP/SystemDiags/SystemDiags.s12
./EFI/HP/SystemDiags/SystemDiags32.s12
./EFI/HP/SystemDiags/SystemDiags.s14
./EFI/HP/SystemDiags/SystemDiags32.s14
./EFI/HP/SystemDiags/HpSysDiags.efi
./EFI/HP/SystemDiags/HpSysDiags32.efi
./EFI/HP/SystemDiags/HpSysDiags.s09
./EFI/HP/SystemDiags/HpSysDiags32.s09
./EFI/HP/SystemDiags/HpSysDiags.s12
./EFI/HP/SystemDiags/HpSysDiags32.s12
./EFI/HP/SystemDiags/HpSysDiags.s14
./EFI/HP/SystemDiags/HpSysDiags32.s14
./EFI/HP/BIOSUpdate
./EFI/HP/BIOSUpdate/CryptRSA.efi
./EFI/HP/BIOSUpdate/CryptRSA32.efi
./EFI/HP/BIOSUpdate/HpBiosUpdate.efi
./EFI/HP/BIOSUpdate/HpBiosUpdate32.efi
./EFI/HP/BIOSUpdate/HpBiosUpdate.sig
./EFI/HP/BIOSUpdate/HpBiosUpdate32.sig
./EFI/HP/BIOSUpdate/HpBiosUpdate.s09
./EFI/HP/BIOSUpdate/HpBiosUpdate32.s09
./EFI/HP/BIOSUpdate/HpBiosUpdate.s12
./EFI/HP/BIOSUpdate/HpBiosUpdate32.s12
./EFI/HP/BIOSUpdate/HpBiosUpdate.s14
./EFI/HP/BIOSUpdate/HpBiosUpdate32.s14
./EFI/HP/BIOSUpdate/HpBiosMgmt.efi
./EFI/HP/BIOSUpdate/HpBiosMgmt32.efi
./EFI/HP/BIOSUpdate/HpBiosMgmt.s09
./EFI/HP/BIOSUpdate/HpBiosMgmt32.s09
./EFI/HP/BIOSUpdate/HpBiosMgmt.s12
./EFI/HP/BIOSUpdate/HpBiosMgmt32.s12
./EFI/HP/BIOSUpdate/HpBiosMgmt.s14
./EFI/HP/BIOSUpdate/HpBiosMgmt32.s14
./EFI/HP/BIOS
./EFI/HP/BIOS/Current
./EFI/HP/BIOS/Current/0827E.sig
./EFI/HP/BIOS/Current/0827E.bin
./EFI/HP/BIOS/New
./EFI/HP/BIOS/Previous
./EFI/ubuntu
./EFI/ubuntu/fw
./EFI/ubuntu/fwupx64.efi
./EFI/ubuntu/grubx64.efi
./EFI/ubuntu/grub.cfg
./EFI/ubuntu/shimx64.efi
./EFI/ubuntu/mmx64.efi
./EFI/ubuntu/BOOTX64.CSV
./System Volume Information
./System Volume Information/IndexerVolumeGuid
For gdisk, I'm assuming this is what is requested?
root@localhost:/boot/efi# gdisk /dev/nvme0n1
GPT fdisk (gdisk) version 1.0.1
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present
Found valid GPT with protective MBR; using GPT.
Command (? for help): p
Disk /dev/nvme0n1: 1000215216 sectors, 476.9 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): A2E05477-2E06-47DD-865C-60C3C58F9E7B
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 1000215182
Partitions will be aligned on 2048-sector boundaries
Total free space is 12909 sectors (6.3 MiB)
Number Start (sector) End (sector) Size Code Name
1 2048 534527 260.0 MiB EF00 EFI system partition
2 534528 567295 16.0 MiB 0C01 Microsoft reserved ...
3 567296 768909311 366.4 GiB 0700 Basic data partition
4 975620096 977627135 980.0 MiB 2700 Basic data partition
5 977627136 1000204287 10.8 GiB 0700 Basic data partition
6 768909312 975620095 98.6 GiB 8300
Command (? for help):
Output of fdisk for good measure:
root@localhost:/boot/efi# fdisk --list
Disk /dev/nvme0n1: 477 GiB, 512110190592 bytes, 1000215216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: A2E05477-2E06-47DD-865C-60C3C58F9E7B
Device Start End Sectors Size Type
/dev/nvme0n1p1 2048 534527 532480 260M EFI System
/dev/nvme0n1p2 534528 567295 32768 16M Microsoft reserved
/dev/nvme0n1p3 567296 768909311 768342016 366.4G Microsoft basic data
/dev/nvme0n1p4 975620096 977627135 2007040 980M Windows recovery environmen
/dev/nvme0n1p5 977627136 1000204287 22577152 10.8G Microsoft basic data
/dev/nvme0n1p6 768909312 975620095 206710784 98.6G Linux filesystem
Partition table entries are not in disk order.