Centos 7 and Windows 10 Dual Boot Grub Not Saving Last Choice
I have a dual boot system with CentOS 7 and Win10. My install was totally vanilla (CentOS then Win10) and went fine. Everything is great except that grub does not appear to save my "last" choice from the boot load menu.
I dug through all the grub configuration files (e.g. /boot/efi/EFI/centos/grub.cfg) and all the code seems there for recording the last choice.
My /etc/default/grub shows:
GRUB_TIMEOUT=5
...
GRUB_DEFAULT=saved
...
GRUB_SAVEDEFAULT=true
Is there anything obvious I am missing or need to do to enable this?
My /etc/efi/EFI/centos/grubenv never apperas to record the latest selection.
It always has:
saved_entry=CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)
##########[...snip...padding to 1k]
I can't see this file from a Windows boot, but I did test via the "rescue Centos entry".
I manually set the value in grubenv to Windows Boot Manager (on /dev/sda2) (the Windows entry) and this works out okay. However, booting back into CentOS fails to change it.
It just seems I am missing something to enable this "save the last choice" behavior. Any ideas?
centos windows grub2
edited Aug 26 '17 at 14:06
njsg
8,61411725
asked Apr 21 '16 at 18:34
Tim
1235
add a comment |
I have a dual boot system with CentOS 7 and Win10. My install was totally vanilla (CentOS then Win10) and went fine. Everything is great except that grub does not appear to save my "last" choice from the boot load menu.
I dug through all the grub configuration files (e.g. /boot/efi/EFI/centos/grub.cfg) and all the code seems there for recording the last choice.
My /etc/default/grub shows:
GRUB_TIMEOUT=5
...
GRUB_DEFAULT=saved
...
GRUB_SAVEDEFAULT=true
Is there anything obvious I am missing or need to do to enable this?
My /etc/efi/EFI/centos/grubenv never apperas to record the latest selection.
It always has:
saved_entry=CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)
##########[...snip...padding to 1k]
I can't see this file from a Windows boot, but I did test via the "rescue Centos entry".
I manually set the value in grubenv to Windows Boot Manager (on /dev/sda2) (the Windows entry) and this works out okay. However, booting back into CentOS fails to change it.
It just seems I am missing something to enable this "save the last choice" behavior. Any ideas?
centos windows grub2
edited Aug 26 '17 at 14:06
njsg
8,61411725
asked Apr 21 '16 at 18:34
Tim
1235
1
have you ran sudo update-grub after editing these files?
– Luca D'Amico
Apr 21 '16 at 18:47
I never modified anything. This was all created by the install process? (Or part of the installed image?)
– Tim
Apr 22 '16 at 8:50
add a comment |
I have a dual boot system with CentOS 7 and Win10. My install was totally vanilla (CentOS then Win10) and went fine. Everything is great except that grub does not appear to save my "last" choice from the boot load menu.
I dug through all the grub configuration files (e.g. /boot/efi/EFI/centos/grub.cfg) and all the code seems there for recording the last choice.
My /etc/default/grub shows:
GRUB_TIMEOUT=5
...
GRUB_DEFAULT=saved
...
GRUB_SAVEDEFAULT=true
Is there anything obvious I am missing or need to do to enable this?
My /etc/efi/EFI/centos/grubenv never apperas to record the latest selection.
It always has:
saved_entry=CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)
##########[...snip...padding to 1k]
I can't see this file from a Windows boot, but I did test via the "rescue Centos entry".
I manually set the value in grubenv to Windows Boot Manager (on /dev/sda2) (the Windows entry) and this works out okay. However, booting back into CentOS fails to change it.
It just seems I am missing something to enable this "save the last choice" behavior. Any ideas?
centos windows grub2
edited Aug 26 '17 at 14:06
njsg
8,61411725
asked Apr 21 '16 at 18:34
Tim
1235
I have a dual boot system with CentOS 7 and Win10. My install was totally vanilla (CentOS then Win10) and went fine. Everything is great except that grub does not appear to save my "last" choice from the boot load menu.
I dug through all the grub configuration files (e.g. /boot/efi/EFI/centos/grub.cfg) and all the code seems there for recording the last choice.
My /etc/default/grub shows:
GRUB_TIMEOUT=5
...
GRUB_DEFAULT=saved
...
GRUB_SAVEDEFAULT=true
Is there anything obvious I am missing or need to do to enable this?
My /etc/efi/EFI/centos/grubenv never apperas to record the latest selection.
It always has:
saved_entry=CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core)
##########[...snip...padding to 1k]
I can't see this file from a Windows boot, but I did test via the "rescue Centos entry".
I manually set the value in grubenv to Windows Boot Manager (on /dev/sda2) (the Windows entry) and this works out okay. However, booting back into CentOS fails to change it.
It just seems I am missing something to enable this "save the last choice" behavior. Any ideas?
centos windows grub2
centos windows grub2
edited Aug 26 '17 at 14:06
njsg
8,61411725
asked Apr 21 '16 at 18:34
Tim
1235
edited Aug 26 '17 at 14:06
njsg
8,61411725
asked Apr 21 '16 at 18:34
Tim
1235
edited Aug 26 '17 at 14:06
njsg
8,61411725
edited Aug 26 '17 at 14:06
njsg
8,61411725
edited Aug 26 '17 at 14:06
njsg
8,61411725
8,61411725
asked Apr 21 '16 at 18:34
Tim
1235
asked Apr 21 '16 at 18:34
Tim
1235
asked Apr 21 '16 at 18:34
Tim
1235
1235
1
have you ran sudo update-grub after editing these files?
– Luca D'Amico
Apr 21 '16 at 18:47
I never modified anything. This was all created by the install process? (Or part of the installed image?)
– Tim
Apr 22 '16 at 8:50
add a comment |
1
have you ran sudo update-grub after editing these files?
– Luca D'Amico
Apr 21 '16 at 18:47
I never modified anything. This was all created by the install process? (Or part of the installed image?)
– Tim
Apr 22 '16 at 8:50
1
1
have you ran sudo update-grub after editing these files?
– Luca D'Amico
Apr 21 '16 at 18:47
have you ran sudo update-grub after editing these files?
– Luca D'Amico
Apr 21 '16 at 18:47
I never modified anything. This was all created by the install process? (Or part of the installed image?)
– Tim
Apr 22 '16 at 8:50
I never modified anything. This was all created by the install process? (Or part of the installed image?)
– Tim
Apr 22 '16 at 8:50
add a comment |
4 Answers
4
active
oldest
votes
Alternatively, you can simply specify the number for GRUB_DEFAULT for the OS you want to set as default. Go the grub configuration file located at /boot/grub2/grub.cfg and search for the keyword menuentry. This will have the OS listing that will appear on the boot screen.
Assuming CentOS entry is first and then Windows entry, if you want the default OS to boot as CentOS, simply edit the value for GRUB_DEFAULT in /etc/default/grub as follows
GRUB_DEFAULT=0
If you want Windows 10 to be booted as default, then set
GRUB_DEFAULT=1
Save and reboot. You should be getting your selected OS as default.
answered Apr 23 '16 at 6:24
1337ninja
111
add a comment |
The /etc/default/grub file is used to generate the final grub.cfg file that actually governs the behavior of grub. After editing the grub file you have to run
sudo update-grub
to generate a new /boot/grub/grub.cfg (usual location).
answered May 2 '16 at 0:03
Three Diag
23619
add a comment |
Realizing this question is almost a year old, I can confirm the following works:
$ su
Password:
# vim /boot/grub/grub.conf
Within the file, I have the following:
default=saved
timeout=5
...
title CentOS (2.6.32-642.13.1.el6.x86_64)
root ...
...
savedefault
initrd ...
title CentOS (<old kernel>...)
...
savedefault
title Windows (10)
...
savedefault
I think you might be missing the savedefault keyword(?) in each boot entry - although it also looks like you might be on CentOS 7, and I'm on CentOS 6. IIRC, CentOS 6 uses GRUB (GRUB v1.97), while CentOS 7 uses GRUB2 (GRUB 2.01).
I'm sure future users/searchers will appreciate any who can confirm/deny that this addresses their problem.
answered Feb 1 '17 at 2:28
user3.1415927
53117
add a comment |
I can confirm that savedefault option is necessary in Centos 7.
What I did was create my custom entries in /etc/grub.d/40_custom making sure that savedefault was present.
And then updating the menu:
grub2-mkconfig -o /boot/grub2/grub.cfg
That's it!
edited Aug 26 '17 at 13:55
B Layer
4,0141525
answered Aug 26 '17 at 12:34
jesus
1
add a comment |
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4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
Alternatively, you can simply specify the number for GRUB_DEFAULT for the OS you want to set as default. Go the grub configuration file located at /boot/grub2/grub.cfg and search for the keyword menuentry. This will have the OS listing that will appear on the boot screen.
Assuming CentOS entry is first and then Windows entry, if you want the default OS to boot as CentOS, simply edit the value for GRUB_DEFAULT in /etc/default/grub as follows
GRUB_DEFAULT=0
If you want Windows 10 to be booted as default, then set
GRUB_DEFAULT=1
Save and reboot. You should be getting your selected OS as default.
answered Apr 23 '16 at 6:24
1337ninja
111
add a comment |
Alternatively, you can simply specify the number for GRUB_DEFAULT for the OS you want to set as default. Go the grub configuration file located at /boot/grub2/grub.cfg and search for the keyword menuentry. This will have the OS listing that will appear on the boot screen.
Assuming CentOS entry is first and then Windows entry, if you want the default OS to boot as CentOS, simply edit the value for GRUB_DEFAULT in /etc/default/grub as follows
GRUB_DEFAULT=0
If you want Windows 10 to be booted as default, then set
GRUB_DEFAULT=1
Save and reboot. You should be getting your selected OS as default.
answered Apr 23 '16 at 6:24
1337ninja
111
add a comment |
Alternatively, you can simply specify the number for GRUB_DEFAULT for the OS you want to set as default. Go the grub configuration file located at /boot/grub2/grub.cfg and search for the keyword menuentry. This will have the OS listing that will appear on the boot screen.
Assuming CentOS entry is first and then Windows entry, if you want the default OS to boot as CentOS, simply edit the value for GRUB_DEFAULT in /etc/default/grub as follows
GRUB_DEFAULT=0
If you want Windows 10 to be booted as default, then set
GRUB_DEFAULT=1
Save and reboot. You should be getting your selected OS as default.
answered Apr 23 '16 at 6:24
1337ninja
111
Alternatively, you can simply specify the number for GRUB_DEFAULT for the OS you want to set as default. Go the grub configuration file located at /boot/grub2/grub.cfg and search for the keyword menuentry. This will have the OS listing that will appear on the boot screen.
Assuming CentOS entry is first and then Windows entry, if you want the default OS to boot as CentOS, simply edit the value for GRUB_DEFAULT in /etc/default/grub as follows
GRUB_DEFAULT=0
If you want Windows 10 to be booted as default, then set
GRUB_DEFAULT=1
Save and reboot. You should be getting your selected OS as default.
answered Apr 23 '16 at 6:24
1337ninja
111
answered Apr 23 '16 at 6:24
1337ninja
111
answered Apr 23 '16 at 6:24
1337ninja
111
answered Apr 23 '16 at 6:24
1337ninja
111
111
add a comment |
add a comment |
The /etc/default/grub file is used to generate the final grub.cfg file that actually governs the behavior of grub. After editing the grub file you have to run
sudo update-grub
to generate a new /boot/grub/grub.cfg (usual location).
answered May 2 '16 at 0:03
Three Diag
23619
add a comment |
The /etc/default/grub file is used to generate the final grub.cfg file that actually governs the behavior of grub. After editing the grub file you have to run
sudo update-grub
to generate a new /boot/grub/grub.cfg (usual location).
answered May 2 '16 at 0:03
Three Diag
23619
add a comment |
The /etc/default/grub file is used to generate the final grub.cfg file that actually governs the behavior of grub. After editing the grub file you have to run
sudo update-grub
to generate a new /boot/grub/grub.cfg (usual location).
answered May 2 '16 at 0:03
Three Diag
23619
The /etc/default/grub file is used to generate the final grub.cfg file that actually governs the behavior of grub. After editing the grub file you have to run
sudo update-grub
to generate a new /boot/grub/grub.cfg (usual location).
answered May 2 '16 at 0:03
Three Diag
23619
answered May 2 '16 at 0:03
Three Diag
23619
answered May 2 '16 at 0:03
Three Diag
23619
answered May 2 '16 at 0:03
Three Diag
23619
23619
add a comment |
add a comment |
Realizing this question is almost a year old, I can confirm the following works:
$ su
Password:
# vim /boot/grub/grub.conf
Within the file, I have the following:
default=saved
timeout=5
...
title CentOS (2.6.32-642.13.1.el6.x86_64)
root ...
...
savedefault
initrd ...
title CentOS (<old kernel>...)
...
savedefault
title Windows (10)
...
savedefault
I think you might be missing the savedefault keyword(?) in each boot entry - although it also looks like you might be on CentOS 7, and I'm on CentOS 6. IIRC, CentOS 6 uses GRUB (GRUB v1.97), while CentOS 7 uses GRUB2 (GRUB 2.01).
I'm sure future users/searchers will appreciate any who can confirm/deny that this addresses their problem.
answered Feb 1 '17 at 2:28
user3.1415927
53117
add a comment |
Realizing this question is almost a year old, I can confirm the following works:
$ su
Password:
# vim /boot/grub/grub.conf
Within the file, I have the following:
default=saved
timeout=5
...
title CentOS (2.6.32-642.13.1.el6.x86_64)
root ...
...
savedefault
initrd ...
title CentOS (<old kernel>...)
...
savedefault
title Windows (10)
...
savedefault
I think you might be missing the savedefault keyword(?) in each boot entry - although it also looks like you might be on CentOS 7, and I'm on CentOS 6. IIRC, CentOS 6 uses GRUB (GRUB v1.97), while CentOS 7 uses GRUB2 (GRUB 2.01).
I'm sure future users/searchers will appreciate any who can confirm/deny that this addresses their problem.
answered Feb 1 '17 at 2:28
user3.1415927
53117
add a comment |
Realizing this question is almost a year old, I can confirm the following works:
$ su
Password:
# vim /boot/grub/grub.conf
Within the file, I have the following:
default=saved
timeout=5
...
title CentOS (2.6.32-642.13.1.el6.x86_64)
root ...
...
savedefault
initrd ...
title CentOS (<old kernel>...)
...
savedefault
title Windows (10)
...
savedefault
I think you might be missing the savedefault keyword(?) in each boot entry - although it also looks like you might be on CentOS 7, and I'm on CentOS 6. IIRC, CentOS 6 uses GRUB (GRUB v1.97), while CentOS 7 uses GRUB2 (GRUB 2.01).
I'm sure future users/searchers will appreciate any who can confirm/deny that this addresses their problem.
answered Feb 1 '17 at 2:28
user3.1415927
53117
Realizing this question is almost a year old, I can confirm the following works:
$ su
Password:
# vim /boot/grub/grub.conf
Within the file, I have the following:
default=saved
timeout=5
...
title CentOS (2.6.32-642.13.1.el6.x86_64)
root ...
...
savedefault
initrd ...
title CentOS (<old kernel>...)
...
savedefault
title Windows (10)
...
savedefault
I think you might be missing the savedefault keyword(?) in each boot entry - although it also looks like you might be on CentOS 7, and I'm on CentOS 6. IIRC, CentOS 6 uses GRUB (GRUB v1.97), while CentOS 7 uses GRUB2 (GRUB 2.01).
I'm sure future users/searchers will appreciate any who can confirm/deny that this addresses their problem.
answered Feb 1 '17 at 2:28
user3.1415927
53117
answered Feb 1 '17 at 2:28
user3.1415927
53117
answered Feb 1 '17 at 2:28
user3.1415927
53117
answered Feb 1 '17 at 2:28
user3.1415927
53117
53117
add a comment |
add a comment |
I can confirm that savedefault option is necessary in Centos 7.
What I did was create my custom entries in /etc/grub.d/40_custom making sure that savedefault was present.
And then updating the menu:
grub2-mkconfig -o /boot/grub2/grub.cfg
That's it!
edited Aug 26 '17 at 13:55
B Layer
4,0141525
answered Aug 26 '17 at 12:34
jesus
1
add a comment |
I can confirm that savedefault option is necessary in Centos 7.
What I did was create my custom entries in /etc/grub.d/40_custom making sure that savedefault was present.
And then updating the menu:
grub2-mkconfig -o /boot/grub2/grub.cfg
That's it!
edited Aug 26 '17 at 13:55
B Layer
4,0141525
answered Aug 26 '17 at 12:34
jesus
1
add a comment |
I can confirm that savedefault option is necessary in Centos 7.
What I did was create my custom entries in /etc/grub.d/40_custom making sure that savedefault was present.
And then updating the menu:
grub2-mkconfig -o /boot/grub2/grub.cfg
That's it!
edited Aug 26 '17 at 13:55
B Layer
4,0141525
answered Aug 26 '17 at 12:34
jesus
1
I can confirm that savedefault option is necessary in Centos 7.
What I did was create my custom entries in /etc/grub.d/40_custom making sure that savedefault was present.
And then updating the menu:
grub2-mkconfig -o /boot/grub2/grub.cfg
That's it!
edited Aug 26 '17 at 13:55
B Layer
4,0141525
answered Aug 26 '17 at 12:34
jesus
1
edited Aug 26 '17 at 13:55
B Layer
4,0141525
edited Aug 26 '17 at 13:55
B Layer
4,0141525
edited Aug 26 '17 at 13:55
B Layer
4,0141525
4,0141525
answered Aug 26 '17 at 12:34
jesus
1
answered Aug 26 '17 at 12:34
jesus
1
answered Aug 26 '17 at 12:34
jesus
1
1
add a comment |
add a comment |
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1
have you ran sudo update-grub after editing these files?
– Luca D'Amico
Apr 21 '16 at 18:47
I never modified anything. This was all created by the install process? (Or part of the installed image?)
– Tim
Apr 22 '16 at 8:50