Update-grub (grub-mkconfig -o /boot/grub/grub.cfg)

okay so i use a bash script to generate my grub config its just an alias to grub-mkconfig -o /boot/grub/grub.cfg but with the last update (today) i am now getting this
[fennectech@FennecNET_Mobile ~]$ sudo update-grub
Generating grub configuration file ...
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
Found linux image: /boot/vmlinuz-linux
Found initrd image: /boot/initramfs-linux.img
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
Found fallback initramfs image: /boot/initramfs-linux-fallback.img
/proc/devices: No entry for device-mapper found
/proc/devices: No entry for device-mapper found
done
i am really worried not sure what this means
EDIT______
[fennectech@FennecNET_Mobile ~]$ sudo update-grub
[sudo] password for fennectech:
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-linux
Found initrd image: /boot/initramfs-linux.img
Found fallback initramfs image: /boot/initramfs-linux-fallback.img
done
[fennectech@FennecNET_Mobile ~]$
now this is after a reboot
Last edited by fennectech (2014-07-08 18:27:09)

Not a Sysadmin issue, moving to NC...

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[solved] /boot/grub/grub.cfg installed as /boot/grub/grub.cfg.pacnew

Hello there,
With the latest update of grub-common I got the following message:
( 3/15) upgrading grub-common [################################################################] 100%
warning: /boot/grub/grub.cfg installed as /boot/grub/grub.cfg.pacnew
However, should I reflect the changes of grub.cfg.pacnew or simply ignore it because grub.cfg is generated automatically?
Last edited by orschiro (2013-05-29 05:08:19)

koz wrote:
cfr wrote:
Natanji wrote:I just broke my system with this, so I think the package should *at least* post a notice to the user asking him to run "grub-mkconfig -o /boot/grub/grub.cfg" - or simply doing so post-installation, even. I know, my fault, but it's still really easy to overlook...
Since automating it would make it virtually impossible to maintain a manually configured grub.cfg, I disagree. Arch does not do that stuff automatically. Even for those who do not hand edit the config file, it is likely to break things if people have more complex setups. (For example, in some cases, grub will not find an OS unless the partition is mounted and it might not be mounted.) Actually, not even Fedora does this automatically although I suspect that is considered a bug.
As for the warning, pacman does warn you. It tells you it has installed a *.pacnew file. That tells you two things: (1) you needed to customise the previous default config, and (2) the default config has changed. That copying the pacnew over your old config will break things is standard: blindly copying *any* pacnew over your old, customised file will break things. I agree that it breaks things in a bigger way in this case but the principle is exactly the same. That is not to say that I think a reminder would be out of place - other boot loaders'managers do post such messages. But being told about a pacnew or a pacsave file *is* notification from grub that user intervention is required and this is usually because somebody who knows the system and customisations made previously is required to adapt the changes to accommodate the update. i.e. it is usually because blindly overwriting stuff is very likely to break things.
It is automated! WTF?!
Not really. One can hand edit grub.cfg and the package does not interfere with that.
This is what pacman threw out at me:
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warning: /boot/grub/grub.cfg saved as /boot/grub/grub.cfg.pacsave
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( 2/11) upgrading e2fsprogs [#######################################] 100%
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Copying /boot/grub/grub.cfg.pacsave to /boot/grub/grub.cfg
Is this intended??
It, thankfully, didn't break anything but this isn't what should have happened. I am sure it will ruin someone's day.
I agree this is strange. I have no idea why it moves your old config to a .pacsave and then copies that .pacsave back to grub.cfg. Effectively what it does is just make a copy of your config as .pacsave but I don't know why it does that.
It is in fact quite unlikely to break anything since it is very likely that an existing grub.cfg will work with the new version of grub. Obviously people should check but if somebody doesn't it is not likely to do any harm. I am not sure what you did to break your configuration but I doubt that you copied grub.cfg.pacsave to grub.cfg.

Adding hibernation support to Ubuntu grub.cfg file

Hi everyone,
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You basically have two choices.
1. Change your installation so that Arch is controlling grub, and then use the method you describe above. Install grub from Arch, and use os-prober and update-grub to add an entry for Ubuntu.
2. Continue to allow Ubuntu to control grub, in which case you should really be asking for help on the Ubuntu forum, not here.
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[Solved] Grub configuration (grub.cfg) no Windows 8 menuentry

Hi! How should one generage grub.cfg for Windows 8 on old hardware? A PC is over 4 years old. Grub-mkconfig gives nothing for a ntfs partition with Windows 8.
Last edited by marko90 (2014-11-24 21:01:26)

marko90 wrote:
Thanks a lot for the replies. Here they are:
[root@localhost ~]# parted -l
Model: ATA WDC WD1600BEVT-6 (scsi)
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Sector size (logical/physical): 512B/512B
Partition Table: msdos
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1 1049kB 21.0GB 21.0GB primary ext4
2 21.0GB 157GB 136GB primary ntfs boot
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Last edited by Head_on_a_Stick (2014-11-24 20:58:54)

Grub.cfg

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diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
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   0:                  Apple_HFS Macintosh HD           *90.0 GB    disk1
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gpt show: /dev/disk0: mediasize=121332826112; sectorsize=512; blocks=236978176
gpt show: /dev/disk0: Suspicious MBR at sector 0
gpt show: /dev/disk0: Pri GPT at sector 1
gpt show: /dev/disk0: Sec GPT at sector 236978175
      start       size index contents
          0          1         MBR
          1          1         Pri GPT header
          2         32         Pri GPT table
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         40     409600      1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     409640 177734368      2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
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179413544   18503128
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236976128       2015
236978143         32         Sec GPT table
236978175          1         Sec GPT header
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Disk: /dev/disk0 geometry: 14751/255/63 [236978176 sectors]
Signature: 0xAA55
         Starting       Ending
#: id cyl hd sec - cyl hd sec [     start -       size]
1: EE 1023 254 63 - 1023 254 63 [         1 -     409639] <Unknown ID>
2: AC 1023 254 63 - 1023 254 63 [    409640 - 177734368] <Unknown ID>
3: AB 1023 254 63 - 1023 254 63 [ 178144008 -    1269536] Darwin Boot
4: 0C 1023 254 63 - 1023 254 63 [ 197916672 -   39059456] Win95 FAT32L

Here is a table to validate your values.
GPT 3 Start
GPT 3 Size
GPT 3 End
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Sector Offset
NTFS Size
NTFS End
Sector Offset (MB)
178144008
1269536
179413544
179415040
1496
57561081
236976121
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Leave your Testdisk display and start a new Terminal Window.
If you see any error messages during the following steps, please stop and post back here with the error message. The following steps have values from your Testdisk output (and you can verify) in Steps 7 and 8.
Rebuild GPT4 using start/end offsets
Sudo gdisk /dev/rdisk0
P (print the full list of parts)
D (delete)
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N (new part)
4   (part 4)
179415040- Start offset in bytes (start point for Bootcamp part)
+57561081- (Size offset as opposed to End offset)
0700     (Windows part type)
P           (print list of all parts just to see what changes will be made)
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Y           (Yes! really write the new GPT)
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R   (Recover)
H (chooses Hybrid)
Partitions numbers to be hybridized: 2 3 4
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N (part 2 boot flag)
N (part 3 boot flag)
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Y    (Yes! write the new MBR)
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Creating entry for GPT partition #2 (MBR partition #2)
Enter an MBR hex code (default AF): Press Enter/Return
Set the bootable flag? (Y/N): N
Creating entry for GPT partition #3 (MBR partition #3)
Enter an MBR hex code (default AB): Press Enter/Return
Set the bootable flag? (Y/N): N
Creating entry for GPT partition #4 (MBR partition #4)
Enter an MBR hex code (default 07): Press Enter/Return
Set the bootable flag? (Y/N): Y
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