General :: Grub2 Detects Mac OSX On Sdb But Doesn't Install It To Grub.cfg
Feb 13, 2010
Working on a quad boot system. Two Karmic installs (I find I tend to hork one every once in a while by playing too much, so having a backup around is nice), windows 7, and Snow Leopard. I got everything up and running, except I had Leopard installed instead of snow leopard. At that time, I had the following:
sda1->win 7
sda2->leopard
sda5->karmic 1
sda6->karmic 2
(others for swap / extended / etc)
Grub2 detected everything just fine, made a real nice grub.cfg file and away I went.Now, I've made a change. Snow Leopard required GUID partitions and I had my stuff all set up as MBR and was /not/ about to reformat and start over. So I added a second drive, sdb.
Now, I can boot to that drive independently. Fine.I can boot to sda just fine and go to either Ubuntu install or windows just fine. Great. Grub2 finds Mac OSX on /dev/sdb2. Awesome (sdb1 is a fat32 bootloader for hackintosh reasons). It not only doesn't update grub.cfg, it leaves the old /dev/sda2 listing for my old Leopard install ... whose partition I deleted. It isn't visible anymore.
Code:
> sudo update-grub
Generating grub.cfg ...
Found Debian background: radar.png
[code]....
But nothing after Ubuntu 9.10 on /dev/sda6 shows up in grub.cfg? I'm at a loss. Any ideas how to get it to populate? I'd rather not hack grub.cfg and have to rebuild it by hand every once in a while especially as grub was fine with finding it.
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Apr 30, 2010
I tend to update stuff slower than most - I'm still using Hardy and I probably won't upgrade to Lucid until June-ish. I wanted to test drive GRUB2 so I upgraded following instructions here:When I chainloaded GRUB2, I got a menu that only contained Ubuntu; my Windows Vista bootloader entry had disappeared. I couldn't find a sample "40_custom" entry to modify when I tried to create an entry for Vista myself. Had no problem booting into Ubuntu and I could still boot Vista from the old menu. Spent about 20 minutes on it, then I gave up and reinstalled legacy GRUB.
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Jan 2, 2011
so my wireless isn't working. My netbook wireless detects the available networks but when I try to connect it doesn't. The box that asks me to put in the password occasionally shows up but it still doesn't load. I even tried re-installing Ubuntu and didn't fix anything.I'm using kernel version 2.6.35-22-generic and
Code:
*-network
description: Ethernet interface
[code]...
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Oct 15, 2010
I (through TeamViewer) helped my mother (who is in Spain) updating her laptop to 10.10. I was of course doing this while doing other things at work, and managed to replace the Grub installation. Now the machine won't boot.
It stops in Grub Rescue.After having a look at the Grub Rescue Mode Megathread I made her type the command
Code:
ls
with the result that it only detects HD0
The previously mentioned thread then says:
Quote:
If all you get is (hd0) you most likely have a partition table or disk error. Seek assistance elsewhere! (fsck, e2fsck, TestDisk, etc.) It used to be (at least) two partitions on the disk, one with Win 7 and one with Ubuntu 10.04. I need to tell her (over the phone) to type in order to make the computer boot again? The laptop is, by the way connected to the Internet. Normally I am so careful when doing stuff like this, but today, I messed it up. And of course it had to be my 2500km's away mothers machine...
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Jan 28, 2011
recently i installed ubuntu 10.10 and now when i start my computor i dont see windows xp in the grub bootloader anymore. (it worked fine for 10.04) my brother as well has had the same problem.
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Jan 21, 2010
In general I love Ubuntu Karmic, and think it's the most polished Gnome distro out there, but since installing it on my laptop alongside Fedora I haven't been able to boot into the latter.
I know that I could fix it by adding an entry into the 40_custom file, but wonder if there's a simpler fix.
The command
Quote:
sudo update-grub
actually finds and lists the Fedora Constantine kernel, but it still doesn't appear in the bootloader menu. Before I delve around and break something, does this mean that there's a line commented out in one of the config files?
I'm not going to slag off Grub 2 because I can see that it has clear benefits, especially for power users, and I don't mind change if it brings clear benefits. So long, /boot/grub/menu.lst.
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Nov 15, 2010
I usually install grub straight away after an install but this time it hasn�t worked for some reason after installing 13.1 on a new lappy. I have tried grub, grub2 (from sbo) and lilo; nothing I install into MBR will boot my slackware installation, I have to use the boot USB stick every time.
grub-legacy would be my preferred one so i�ll ask for help specifically with that. This is what im doing so far -
[Code]...
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Feb 15, 2010
I installed Ubuntu9.10 on a USB hard drive attached to my laptop. Laptop has pre-installed XP in the in-built hard-drive. Point to be noted is that my hard-drive is protected via encryption software called Pointsec.
The installation of Ubuntu on the USB hard drive went through fine and I'm able to boot Ubuntu from it.
But now the problem is, GRUB2 fails to detect the Windows XP installation.
Can someone tell me how I can force GRUB2 to boot Windows XP from hd0,0?
The GRUB1 way of configuring /etc/grub/menu.lst does NOT seem to work with GRUB2.
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Apr 26, 2010
I've just installed the 64 bit edition of 9.10 on my workstation. My raid drivers worked without any custom installation, which is very impressive! I am however having a problem installing grub2. I boot to the live CD, run the install process, resize and partition my free space as an ext4 primary partition with mount point /. Everything installs except grub, so I'm always booting in to windows.This seems to be a bit off as I've never had this occur with dual booting before.
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Mar 21, 2011
I have used CentOS for a while and have never run into this issue. I searched all over and didn't see a similar issue anywhere, I did an install of CentOS as a server (no GUI) with only the base. Partition is /boot ext3, size of 100MB. The rest of the drive is partitioned as / with ext3. This is being done on a CompactFlash card of 32GB in size. The BIOS sees it as an IDE drive.
When the install completes and the system reboots, the grub stops at the grub> prompt. There is no menu for OS options. If I do the following commands:
grub>root (hd0,0)
grub>kernel /vmlinuz-2.6.18-194.el5 root=LABEL=/
grub>initrd /initrd-2.6.18-194.el5.img
grub>boot
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Dec 20, 2010
I multi-boot Windows XP and 5 Linux distros on a single hard drive. Some of the distros come and go but I keep at least two that are my daily use distros. My boot loader is grub1 located on a ext3 formatted distro. I have installed a distro that requests the partition be formatted ext4, which I did. I have been trying to edit my grub1 menu.lst so that I can chainload the ext4 distro get errors or it goes to the command line with the last word being Grub. My question is, can grub1 ext3 chainload a grub2 ext4 distro?
Here is a sample of my menu.lst
Code:
title MEPIS at sda7, newest kernel
root (hd0,6)
kernel /boot/vmlinuz root=/dev/sda7 nomce quiet splash vga=789
initrd /boot/initrd.img
boot
[Code]...
Mepis is the location of my menu.lst and is ext3 on sda7 and aptosid is the ext4 distro that I am trying to boot on sda9 and it uses grub2.
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Mar 27, 2010
I'm using the Live CD and have followed steps to recover grub2 after XP install. (damn Windows)!
Upon rebooting I get the grub> prompt with no where to go. Upon installing grub via the Live CD I get this:
Quote:
Update:
When I do this link, upon doing the
Quote:
I get this:
Quote:
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Oct 2, 2010
I have a dual boot config with
sda1 /boot
sda2 Win7
sda3 /
sda4 Truecrypt Partition
i have grub1 working and chaonloading truecrypt loader if i choose "win7" in grub1 menu I want to install a new kubuntu (no upgrade) I have read that that there are problems with grub2 and truecrypt actually a bug that grub2 dont chainloads truecrypt boot loader many ppl seem to have problems with grub2 then i read somewhere that ubuntu install is not asking for grub2 to be installed and just installing it. is this right?
i think at least for the alternative install cd its wrong. i installed it on another pc and it asked me! it works for win7 and Ubuntu and i guess its grub2 but there is no truecrypt installed anyway, i wanted to ask is the live cd installer asks me for grub2 and what is the best and easiest way to stay with my grub and just change the menu.lst to the new kernel (i guess there will be one)
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Sep 13, 2009
Here is how I created a Grub2 boot-cd with a (grub.cfg) menu:
mkdir /tmp/cdroot
mkdir /tmp/cdroot/boot
mkdir /tmp/cdroot/boot/grub
cp /boot/grub/grub.cfg /tmp/cdroot/boot/grub
cd /tmp
[code]....
NOTE: The above proceedure assumes you already have a grub.cfg file. If you don't, create one in the /tmp/cdroot/boot/grub directory
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Mar 11, 2010
GRUB2 (not grub legacy) included in what dist? (expect ubuntu)
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Jun 10, 2010
i wiped my entire hard drive that had xp as its only OS. I freshly installed a Windows 7 ultimate and everything went perfectly. I then decided to install 10.4. I split the partitions correctly (i had experience doing this already with my laptop, which has xp/10.4). Ubuntu 10.4 install went flawlessly, except for one thing. Now when i boot up the pc, it goes straight into 10.4. I have tried holding shift during the start up to force the boot menu, and it just shows the Ubuntu 10.4 OS as choices. Any clue what i could do to make Win7 appear in the boot menu?
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Feb 28, 2011
I have an old BIOS (only 149 GB detected in 160 GB drive). I have installed very few OS as a result - Windows in first 80 GB , 2 distros (20 GB each) in next 40 MB which is within the 149 GB. On issue of "update-grub" grub seems to detect all OS and generates grub.cfg. But on boot , one distro does not appear in the menu.
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Jan 19, 2009
I am using a laptop with a realtek8139 integrated adapter. When I boot the live cd (Puppy), I go to configure the internet connection, and shows the module for the card has automatically loaded, and I just set it to DHCP and that is all. After installing the os, however, I go to configure the connection, and it tells me that no module has been loaded, so I should manually choose from the list. When I do, it tells me that it failed to load. I have also tried allowing it to probe by loading every possible driver, to no avail. I have reinstalled the os twice, and it does not recognize the adapter, but when I boot live, it works fine. Any reason why it would do this?
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Jan 5, 2011
I have 6GB of RAM and I'm planning to install Fedora 14 32-bit to achieve a higher degree of compatibility. Does fedora automatically download and install a PAE enabled kernel when it detects more than 4GB of RAM (Just like Ubuntu)?
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Feb 6, 2011
why is grub2 not in fedora 14 ? Is there any way to uninstall grub and install grub2 on fedora 14 ?
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Mar 28, 2011
I have one install (Slack 12.2) on /dev/sda11, and GRUB (GNU GRUB 0.97) boots it without a problem. I just installed a new Slack 13.1 on /dev/sda1, and GRUB fails to boot it as follows:Quote:
grub> root(hd0,0)
> Filesystem id type ext2fs, partition type 0x83
grub> kernel /boot/vmlinuz root=/dev/sda1
[code]....
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Dec 19, 2009
I just installed OpenSuse 11.1 alongside of Ubuntu 9.10. After finishing up the installation I find that I can't get into Ubuntu. I have tried adding Ubuntu to the OpenSuse /boo/grub/menu.lst but it doesn't seem to be working.
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Apr 20, 2011
The installation went smoothly however, I have installed SuSE11.4 on my 2nd Hard Drive. Now Grub doesn't work and I want to know where and how to install it.
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Jan 23, 2010
First time this has happened. I installed Fedora first (XP already installed) and then installed Ubuntu 9.10 64. Fedora doesn't show up on boot up menu. I've tried update-grub.
Before I would have just edited menu.lst, but now?? I dunno.
edit; Here's fdisk with Fedora on sda6
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Feb 6, 2010
I tried to install Ubuntu on an external drive, but it doesn't boot, but it installed GRUB on my main HD, and now I can't even boot Windows. I only get a "grub rescue" prompt. I need to remove GRUB. How to do it?
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Sep 7, 2010
I've installed Lenny with no problem, but I tried switching to Squeeze, and grub for some reason didn't pick up on the Windows partition this time - it just shows the two Linux options (debian and debian single-user). I check the menu.lst file (which I've edited under Lenny with no issues), but for some reason it doesn't exist at all in this install. Is it in a different location with Squeeze maybe?
why grub didn't pick up on my Windows install?
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Aug 29, 2010
during moving my root partition, i used the old grub and installed the old grub on harddisk:
grub
grub > setup (hd0)
now how could i install GRUB2 on harddisk?
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May 2, 2010
I've installed grub2 on 10.04, when I restarted I selected that option in the menu that seems to go for testing the chainloader. The system seemed to start ok, so I ran upgrade-from-grub-legacy. Now it's asking me for "GRUB install devices" and listing my hard drive (/dev/sda) and the 5 partitions on it as possible options. Which should I choose? I have Linux and Windoze running on this desktop,
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Jun 24, 2010
I have been asked to install Ubuntu 10.04 onto a friends machine but appear to be having some very basic problems. I think it may be related to the Grub 2. I do not consider myself a newbie but I am very inexperienced with Grub 2. I know a lot of the tricks of Grub Legacy, but this is driving me daft. It should be simple; a new hard drive, 500GB SATA, has been put into the computer, there are no other hard disks installed and the drive went in as empty.
Ubuntu booted fine into live CD mode without any issues, all of the hardware appeared to be working properly. I then installed it onto the machine, taking up the entire disk as per my friends request. When the installation finished everything seemed as normal, but upon startup I am greeted with a grub rescue prompt. Upon a bit of internet research I discovered that it may be simply that the 500GB is simply too big and that a seperate partition should be made for /boot.
This was done however now I do not even get to the grub rescue prompt after checking the DVD drive for bootable media the computer simply sits at a blinking cursor. I have made sure that grub 2 was installed and setup to look for the /boot partition but these all check out and I am still stuck with the same problem. I am considering simply installing 8.04 LTS and then updating and that should solve my issue of Grub 2, but I know that is avoiding the problem and I will need to learn about Grub 2 at some point.
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Jun 6, 2010
I have an old laptop that I installed EasyPeasy Lucid on. I have never used Grub2 as my other Ubuntu installs still use Grub Legacy. I have studied all the tutorials which instruct that the grub.cfg file should not be edited directly.This old laptop has one of the dreaded Intel graphics chips for which the kernel automatically loads the i915 module. Of course (like a multitude of others with Intel graphics and Lucid) I booted into a black screen but knew the workaround was to enable mode setting through grubI used the
Code:
i915.modeset=1
and added it to /etc/default/grub line GRUB_CMDLINE_LINUX, just after "quite splash", just
[code]....
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