I have used a dual boot system with Windows since 4.10 (Warty) and aside from Windows, after a fresh installation, regularly overwriting Grub, all has worked fine so far.
However since monday (17.09.2018) I am unable to boot to my Windows 10 installation from Grub directly. The entry is still there, but when I select it and press Enter it just shows the Grub menu again.
Strangely if I press 'c' to get to a terminal and then type 'exit', the system boots into my Windows installation successfully. This means Windows is still bootable.
Booting to my Ubuntu 18.04 installation works perfectly as it used to.
This also is no duplicate of Unable to boot into Windows after installing Ubuntu, how to fix?. It did not occur after installing Ubuntu and the fix proposed in that thread does not work, but rather does the new boot entry show the exact same behaviour. Here is the output from the bootinfoscript, if that is of any use: Link to Pastebin
Boot Info Script 0.61 [1 April 2012] ============================= Boot Info Summary: ============================== => Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks in partition 114 for . => Grub2 (v1.99) is installed in the MBR of /dev/sdb and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks in partition 135 for . => No boot loader is installed in the MBR of /dev/sdc. sda1: __________________________________________________________________________ File system: ntfs Boot sector type: Windows Vista/7: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: sda2: __________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Boot files: sdb2: __________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Ubuntu 18.04.1 LTS Boot files: /boot/grub/grub.cfg /etc/fstab sdb3: __________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: sdc1: __________________________________________________________________________ File system: ntfs Boot sector type: Windows Vista/7: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: sdc2: __________________________________________________________________________ File system: vfat Boot sector type: Unknown Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: /efi/Boot/bkpbootx64.efi /efi/Boot/bootx64.efi /efi/Boot/fbx64.efi /efi/ubuntu/fwupx64.efi /efi/ubuntu/grubx64.efi /efi/ubuntu/mmx64.efi /efi/ubuntu/shimx64.efi sdc3: __________________________________________________________________________ File system: Boot sector type: - Boot sector info: Mounting failed: mount: /tmp/BootInfo-LqSMQMp2/sdc3: unbekannter Dateisystemtyp „“. sdc4: __________________________________________________________________________ File system: ntfs Boot sector type: Windows Vista/7: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: /bootmgr /Windows/System32/winload.exe ============================ Drive/Partition Info: ============================= Drive: sda _____________________________________________________________________ Festplatte /dev/sda: 931,5 GiB, 1000204886016 Bytes, 1953525168 Sektoren Einheiten: Sektoren von 1 * 512 = 512 Bytes Sektorgröße (logisch/physikalisch): 512 Bytes / 4096 Bytes E/A-Größe (minimal/optimal): 4096 Bytes / 4096 Bytes Festplattenbezeichnungstyp: dos Partition Boot Start Sector End Sector # of Sectors Id System /dev/sda1 206,848 1,024,002,047 1,023,795,200 7 NTFS / exFAT / HPFS /dev/sda2 1,024,002,048 1,953,523,711 929,521,664 83 Linux Drive: sdb _____________________________________________________________________ Festplatte /dev/sdb: 111,8 GiB, 120034123776 Bytes, 234441648 Sektoren Einheiten: Sektoren von 1 * 512 = 512 Bytes Sektorgröße (logisch/physikalisch): 512 Bytes / 512 Bytes E/A-Größe (minimal/optimal): 512 Bytes / 512 Bytes Festplattenbezeichnungstyp: dos Partition Boot Start Sector End Sector # of Sectors Id System /dev/sdb2 * 2,048 190,767,103 190,765,056 83 Linux /dev/sdb3 190,767,104 234,440,703 43,673,600 82 Linux swap / Solaris Drive: sdc _____________________________________________________________________ Festplatte /dev/sdc: 465,8 GiB, 500107862016 Bytes, 976773168 Sektoren Einheiten: Sektoren von 1 * 512 = 512 Bytes Sektorgröße (logisch/physikalisch): 512 Bytes / 512 Bytes E/A-Größe (minimal/optimal): 512 Bytes / 512 Bytes Festplattenbezeichnungstyp: gpt Partition Boot Start Sector End Sector # of Sectors Id System /dev/sdc1 1 4,294,967,295 4,294,967,295 ee GPT /dev/sdc1 ends after the last sector of /dev/sdc GUID Partition Table detected. Partition Start Sector End Sector # of Sectors System /dev/sdc1 2,048 923,647 921,600 Windows Recovery Environment (Windows) /dev/sdc2 923,648 1,128,447 204,800 EFI System partition /dev/sdc3 1,128,448 1,161,215 32,768 Microsoft Reserved Partition (Windows) /dev/sdc4 1,161,216 976,773,119 975,611,904 Data partition (Windows/Linux) "blkid" output: ________________________________________________________________ Device UUID TYPE LABEL /dev/loop0 squashfs /dev/loop1 squashfs /dev/loop10 squashfs /dev/loop11 squashfs /dev/loop12 squashfs /dev/loop13 squashfs /dev/loop14 squashfs /dev/loop15 squashfs /dev/loop16 squashfs /dev/loop17 squashfs /dev/loop18 squashfs /dev/loop19 squashfs /dev/loop2 squashfs /dev/loop20 squashfs /dev/loop21 squashfs /dev/loop22 squashfs /dev/loop23 squashfs /dev/loop24 squashfs /dev/loop3 squashfs /dev/loop4 squashfs /dev/loop5 squashfs /dev/loop6 squashfs /dev/loop7 squashfs /dev/loop8 squashfs /dev/loop9 squashfs /dev/sda1 3C088A7C088A3544 ntfs Daten /dev/sda2 e365b6b6-cbd2-42f3-84d5-e0fff42416f5 ext4 /dev/sdb2 1b4c1f8c-da20-43e8-aafe-8726f047c11f ext4 /dev/sdb3 24c324b4-3b2e-4d15-8d71-9150d1729d35 swap /dev/sdc1 342E4A592E4A13F0 ntfs /dev/sdc2 54A7-D57B vfat /dev/sdc3 /dev/sdc4 3096B53196B4F884 ntfs ================================ Mount points: ================================= Device Mount_Point Type Options /dev/sda2 /home ext4 (rw,relatime,data=ordered) /dev/sdb2 / ext4 (rw,relatime,errors=remount-ro,data=ordered) /dev/sdc2 /boot/efi vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro) =========================== sdb2/boot/grub/grub.cfg: =========================== -------------------------------------------------------------------------------- # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi if [ "${next_entry}" ] ; then set default="${next_entry}" set next_entry= save_env next_entry set boot_once=true else set default="0" fi if [ x"${feature_menuentry_id}" = xy ]; then menuentry_id_option="--id" else menuentry_id_option="" fi export menuentry_id_option if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { if [ x$feature_all_video_module = xy ]; then insmod all_video else insmod efi_gop insmod efi_uga insmod ieee1275_fb insmod vbe insmod vga insmod video_bochs insmod video_cirrus fi } if [ x$feature_default_font_path = xy ] ; then font=unicode else insmod part_msdos insmod ext2 set root='hd1,msdos2' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 1b4c1f8c-da20-43e8-aafe-8726f047c11f else search --no-floppy --fs-uuid --set=root 1b4c1f8c-da20-43e8-aafe-8726f047c11f fi font="/usr/share/grub/unicode.pf2" fi if loadfont $font ; then set gfxmode=auto load_video insmod gfxterm set locale_dir=$prefix/locale set lang=de_DE insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ] ; then set timeout=30 else if [ x$feature_timeout_style = xy ] ; then set timeout_style=hidden set timeout=10 # Fallback hidden-timeout code in case the timeout_style feature is # unavailable. elif sleep --interruptible 10 ; then set timeout=0 fi fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30,0; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### function gfxmode { set gfxpayload="${1}" if [ "${1}" = "keep" ]; then set vt_handoff=vt.handoff=1 else set vt_handoff= fi } if [ "${recordfail}" != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-1b4c1f8c-da20-43e8-aafe-8726f047c11f' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi insmod part_msdos insmod ext2 set root='hd1,msdos2' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 1b4c1f8c-da20-43e8-aafe-8726f047c11f else search --no-floppy --fs-uuid --set=root 1b4c1f8c-da20-43e8-aafe-8726f047c11f fi linux /boot/vmlinuz-4.15.0-34-generic root=UUID=1b4c1f8c-da20-43e8-aafe-8726f047c11f ro quiet splash $vt_handoff initrd /boot/initrd.img-4.15.0-34-generic } submenu 'Erweiterte Optionen für Ubuntu' $menuentry_id_option 'gnulinux-advanced-1b4c1f8c-da20-43e8-aafe-8726f047c11f' { menuentry 'Ubuntu, mit Linux 4.15.0-34-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-34-generic-advanced-1b4c1f8c-da20-43e8-aafe-8726f047c11f' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi insmod part_msdos insmod ext2 set root='hd1,msdos2' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 1b4c1f8c-da20-43e8-aafe-8726f047c11f else search --no-floppy --fs-uuid --set=root 1b4c1f8c-da20-43e8-aafe-8726f047c11f fi echo 'Linux 4.15.0-34-generic wird geladen …' linux /boot/vmlinuz-4.15.0-34-generic root=UUID=1b4c1f8c-da20-43e8-aafe-8726f047c11f ro quiet splash $vt_handoff echo 'Initiale Ramdisk wird geladen …' initrd /boot/initrd.img-4.15.0-34-generic } menuentry 'Ubuntu, mit Linux 4.15.0-34-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-34-generic-recovery-1b4c1f8c-da20-43e8-aafe-8726f047c11f' { recordfail load_video insmod gzio if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi insmod part_msdos insmod ext2 set root='hd1,msdos2' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 1b4c1f8c-da20-43e8-aafe-8726f047c11f else search --no-floppy --fs-uuid --set=root 1b4c1f8c-da20-43e8-aafe-8726f047c11f fi echo 'Linux 4.15.0-34-generic wird geladen …' linux /boot/vmlinuz-4.15.0-34-generic root=UUID=1b4c1f8c-da20-43e8-aafe-8726f047c11f ro recovery nomodeset echo 'Initiale Ramdisk wird geladen …' initrd /boot/initrd.img-4.15.0-34-generic } menuentry 'Ubuntu, mit Linux 4.15.0-33-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-33-generic-advanced-1b4c1f8c-da20-43e8-aafe-8726f047c11f' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi insmod part_msdos insmod ext2 set root='hd1,msdos2' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 1b4c1f8c-da20-43e8-aafe-8726f047c11f else search --no-floppy --fs-uuid --set=root 1b4c1f8c-da20-43e8-aafe-8726f047c11f fi echo 'Linux 4.15.0-33-generic wird geladen …' linux /boot/vmlinuz-4.15.0-33-generic root=UUID=1b4c1f8c-da20-43e8-aafe-8726f047c11f ro quiet splash $vt_handoff echo 'Initiale Ramdisk wird geladen …' initrd /boot/initrd.img-4.15.0-33-generic } menuentry 'Ubuntu, mit Linux 4.15.0-33-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-33-generic-recovery-1b4c1f8c-da20-43e8-aafe-8726f047c11f' { recordfail load_video insmod gzio if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi insmod part_msdos insmod ext2 set root='hd1,msdos2' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos2 --hint-efi=hd1,msdos2 --hint-baremetal=ahci1,msdos2 1b4c1f8c-da20-43e8-aafe-8726f047c11f else search --no-floppy --fs-uuid --set=root 1b4c1f8c-da20-43e8-aafe-8726f047c11f fi echo 'Linux 4.15.0-33-generic wird geladen …' linux /boot/vmlinuz-4.15.0-33-generic root=UUID=1b4c1f8c-da20-43e8-aafe-8726f047c11f ro recovery nomodeset echo 'Initiale Ramdisk wird geladen …' initrd /boot/initrd.img-4.15.0-33-generic } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/25_custom ### menuentry "Windows UEFI bootmgfw.efi" { search --fs-uuid --no-floppy --set=root 54A7-D57B chainloader (${root})/EFI/Microsoft/Boot/bootmgfw.efi } menuentry "Windows Boot UEFI loader" { search --fs-uuid --no-floppy --set=root 54A7-D57B chainloader (${root})/EFI/Boot/bkpbootx64.efi } menuentry "EFI/ubuntu/MokManager.efi" { search --fs-uuid --no-floppy --set=root 54A7-D57B chainloader (${root})/EFI/ubuntu/MokManager.efi } ### END /etc/grub.d/25_custom ### ### BEGIN /etc/grub.d/30_os-prober ### menuentry 'Windows Boot Manager (auf /dev/sdc2)' --class windows --class os $menuentry_id_option 'osprober-efi-54A7-D57B' { insmod part_gpt insmod fat set root='hd2,gpt2' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt2 --hint-efi=hd2,gpt2 --hint-baremetal=ahci2,gpt2 54A7-D57B else search --no-floppy --fs-uuid --set=root 54A7-D57B fi chainloader /EFI/Microsoft/Boot/bootmgfw.efi } set timeout_style=menu if [ "${timeout}" = 0 ]; then set timeout=10 fi ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/30_uefi-firmware ### ### END /etc/grub.d/30_uefi-firmware ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f ${config_directory}/custom.cfg ]; then source ${config_directory}/custom.cfg elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ## END /etc/grub.d/41_custom ### -------------------------------------------------------------------------------- =============================== sdb2/etc/fstab: ================================ -------------------------------------------------------------------------------- # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/sdb2 during installation UUID=1b4c1f8c-da20-43e8-aafe-8726f047c11f / ext4 errors=remount-ro 0 1 # /home was on /dev/sda3 during installation UUID=e365b6b6-cbd2-42f3-84d5-e0fff42416f5 /home ext4 defaults 0 2 # swap was on /dev/sdb3 during installation UUID=24c324b4-3b2e-4d15-8d71-9150d1729d35 none swap sw 0 0 UUID=54A7-D57B /boot/efi vfat defaults 0 1 -------------------------------------------------------------------------------- =================== sdb2: Location of files loaded by Grub: ==================== GiB - GB File Fragment(s) ======================== Unknown MBRs/Boot Sectors/etc: ======================== Unknown BootLoader on sdc2 00000000 eb 58 90 4d 53 44 4f 53 35 2e 30 00 02 02 fe 19 |.X.MSDOS5.0.....| 00000010 02 00 00 00 00 f8 00 00 3f 00 ff 00 00 18 0e 00 |........?.......| 00000020 00 20 03 00 01 03 00 00 00 00 00 00 02 00 00 00 |. ..............| 00000030 01 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000040 80 01 29 7b d5 a7 54 4e 4f 20 4e 41 4d 45 20 20 |..){..TNO NAME | 00000050 20 20 46 41 54 33 32 20 20 20 33 c9 8e d1 bc f4 | FAT32 3.....| 00000060 7b 8e c1 8e d9 bd 00 7c 88 56 40 88 4e 02 8a 56 |{......|.V@.N..V| 00000070 40 b4 41 bb aa 55 cd 13 72 10 81 fb 55 aa 75 0a |@.A..U..r...U.u.| 00000080 f6 c1 01 74 05 fe 46 02 eb 2d 8a 56 40 b4 08 cd |...t..F..-.V@...| 00000090 13 73 05 b9 ff ff 8a f1 66 0f b6 c6 40 66 0f b6 |.s......f...@f..| 000000a0 d1 80 e2 3f f7 e2 86 cd c0 ed 06 41 66 0f b7 c9 |...?.......Af...| 000000b0 66 f7 e1 66 89 46 f8 83 7e 16 00 75 39 83 7e 2a |f..f.F..~..u9.~*| 000000c0 00 77 33 66 8b 46 1c 66 83 c0 0c bb 00 80 b9 01 |.w3f.F.f........| 000000d0 00 e8 2c 00 e9 a8 03 a1 f8 7d 80 c4 7c 8b f0 ac |..,......}..|...| 000000e0 84 c0 74 17 3c ff 74 09 b4 0e bb 07 00 cd 10 eb |..t.<.t.........| 000000f0 ee a1 fa 7d eb e4 a1 7d 80 eb df 98 cd 16 cd 19 |...}...}........| 00000100 66 60 80 7e 02 00 0f 84 20 00 66 6a 00 66 50 06 |f`.~.... .fj.fP.| 00000110 53 66 68 10 00 01 00 b4 42 8a 56 40 8b f4 cd 13 |Sfh.....B.V@....| 00000120 66 58 66 58 66 58 66 58 eb 33 66 3b 46 f8 72 03 |fXfXfXfX.3f;F.r.| 00000130 f9 eb 2a 66 33 d2 66 0f b7 4e 18 66 f7 f1 fe c2 |..*f3.f..N.f....| 00000140 8a ca 66 8b d0 66 c1 ea 10 f7 76 1a 86 d6 8a 56 |..f..f....v....V| 00000150 40 8a e8 c0 e4 06 0a cc b8 01 02 cd 13 66 61 0f |@............fa.| 00000160 82 74 ff 81 c3 00 02 66 40 49 75 94 c3 42 4f 4f |.t.....f@Iu..BOO| 00000170 54 4d 47 52 20 20 20 20 00 00 00 00 00 00 00 00 |TMGR ........| 00000180 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000001a0 00 00 00 00 00 00 00 00 00 00 00 00 0d 0a 4d 65 |..............Me| 000001b0 64 69 65 6e 66 65 68 6c 65 72 ff 0d 0a 4e 65 75 |dienfehler...Neu| 000001c0 73 74 61 72 74 3a 20 54 61 73 74 65 20 64 72 81 |start: Taste dr.| 000001d0 63 6b 65 6e 0d 0a 00 00 00 00 00 00 00 00 00 00 |cken............| 000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000001f0 00 00 00 00 00 00 00 00 ac 01 bb 01 00 00 55 aa |..............U.| 00000200 =============================== StdErr Messages: =============================== cat: /tmp/BootInfo-LqSMQMp2/Tmp_Log: Datei oder Verzeichnis nicht gefunden
Did anyone experience a similar situation or has any tips on how to resolve this?
