Ubuntu / Apple :: When Booting Can Only Acces A Broken GRUB?
Dec 26, 2010
when booting I can only acces a broken GRUB and this is how I might have done it wrong. I installed Ubuntu the first time using dual-booting which I think is the worst way since it could be done better by using a Virtual Machine such as Parralels or VMware. Well later I noticed that after removing Ubuntu there was still 2 problems 1.when selecting a OS during startup When I select "Windows" it goes to a broken GRUB which displays something like this " Use tab to complete the first commands" GRUB><where you're suppose to type> and I can't type so I hard reboot it. 2. I could not get rid of LinuxSwap. Much later I removed LinuxSwap by booting in a Ubuntu live disk and then removing the partition as well as the Linux "/" and after booting to Mac OS X leopard disk0s1 the Mac OS X system partition was mounted which was bad since it was suppose to be invisible to even the root user unless viewed by terminal on any user.
Now later I reformatted it as "Mac OS X something extended" and at first it was unjointed and impossible to mount and after I reformatted it it appeared as disk0s3. Now the problem appeared.This is the stuff I can do1. I can type some commands in the GRUB but when I typed find / the output is something like can't find /2. I might be able to boot up a live disk however my Linux Ubuntu live disk is broken.3. this is my dad's second hand Mac G5 iSight, not mine and it was a bargain, it was cheaper than my iPad with Mac OS X Leopard 10.5#
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Aug 2, 2011
I've been running Ubuntu for some time on an old MacBook 3,1. It has been a happy OSX / 10.04 dual boot. I'm attempting a triple boot: OSX / Ubuntu 10.04 / Ubuntu 10.10. The partition scheme is similar to this, I've lost exact partition sizes:
Code:
1 20.5kB 210MB 210MB fat32 EFI System Partition boot
2 210MB 32.9GB 32.7GB hfs+ Untitled
3 33.1GB 33.2GB 105MB ext2 Untitled
4 33.2GB 33.9GB 734MB linux-swap(v1) Untitled
[Code]...
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Feb 11, 2010
I just install ubuntu Linux fully on my computer. Now i then install Grub-EFI, and EFI amd64. I also blessed my Linux partition. Now did i install everything to boot grub EFI? if i did. how do i know im booting using Grub EFI and not GRUB?
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Jan 9, 2010
Today I installed all the updates that were associated with the 2.6.31-17 kernel upgrade on Ubuntu 9.10.It appears the update has broken my stock 17-inch Macbook Pro 5,2 because after restarting my screen is just black. I don't see the ReFit choice menu (I have OS X and Ubuntu installed), and even when I let the machine boot all the way into Mac OS X the screen just remains black. The apple logo on the back of the screen doesn't turn on at all.
I can see the keyboard backlights eventually come on (which is normal when you get to Mac OS X login prompt) - so its almost as if its booting but just wont talk to the display. When you press the brightness buttons you can faintly see the shade of black changing.What the heck has happened? I just paid a big load of money for this baby and I'm very sad now I love Ubuntu but this is ridiculous.
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Feb 2, 2010
My wireless was working perfectly until I accidentally let the battery run flat with the machine prevented from hibernating. Upon recovery, there was no wireless available. Checking the Hardware Drivers, I can see the Broadcomm driver as "Activated but not currently in use". Following the copious advice elsewhere I have disabled the driver, rebooted the machine, enabled it again - many times. Still the same message. What is stopping me from activating it? Bit of a noob so........
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Jul 5, 2010
I installed Ubuntu 10.04 lucid lynx 64bit on my mac pro in a dual boot setup with os x. When installing I had some trouble figuring out the partitions, especially because the thing happened with the extra partition from nowhere. I deleted the small partition created by the installer, synced the GPT and MBR, installed GRUB on /dev/sda4 and all was fine.
After my first software update my system is now broken, after rEFIt it got stuck on a black screen. I started up from the livecd, chrooted into my system, reinstalled GRUB on /dev/sda4, installed it on /dev/sda too, but that did not really help. I now get to the GRUB rescue shell, but I'm pretty clueless what to do. Also it does not seem a widespread problem, since I didn;t find many reports of dual-boot macintels breaking with this update. What can I do to restore my linux system ?
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May 4, 2010
After upgrading to lucid, the remote that accompanied my macbook 4.1 appears to do nothing. (Testing with irw and xev). The howto at [URL] avoids any reference to the remote. I had it working properly in karmic. The howto at [URL] fails to help -- and is pretty much what I'd successfully done under kamic. The following launchpad post accurately describes my experience: [URL]. Has anyone resolved, found a workaround for, or otherwise had success getting lirc to work on a macbook with lucid?
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Nov 16, 2010
Doing some experimentation with the XP Home BootCamp on my MacBook, I installed Wubi. (Yes, installed Wubi, on a BootCamp partition, on a Mac). Amazingly, it works flawlessly! But I thought up something while considering the issues with booting from USB on a Mac. My theory is this: Its the EFI and the Firmware which has compatibility issues with booting from USB. But when running BootCamp to use a Windows Partition, it emulates BIOS, which nowadays is good with booting from USB..
So, If I select to boot from Windows, which then leads to another selection asking for Ubuntu (GRUB) or Windows, you could select Ubuntu, which chucks you up at the standard version of GRUB, which to my understanding does support from USB booting? Select your stick and your off. If somebody would be willing to try this theory or correct me, maybe you could think up some easier way in which to boot from a USB with a Mac.
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Jan 4, 2010
I have a jaunty installation which is working fine, and I'm gradually getting a dual boot of karmic (desktop amd64) up to speed to take over from it. I've got a fairly standard ADSL modem/switch/router connected by wires to the machine as eth0.I setup local static IP etc. during installation (no DHCP at all) and it worked fine for quite a while. Then, after an upgrade one day, DNS broke on reboot.After booting now, /etc/resolv.conf is essentially empty (just comments) but the networking service is up. I can ping places out on the web.If I "/etc/init.d/networking restart" then /etc/resolv.conf gets the correct "nameserver" and "search" lines added to it and everything is fine... until next boot.I never really worked out exactly how Ubuntu controls its networking config, and I'm further confused by the changes to the booting setup in Karmic
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Apr 22, 2010
I was able to make a grub.efi boot loader finally. But in the end it did not make or generate a grub.cfg, so every time i boot using this loader I get the grub bash shell and nothing else. I tried copying the on from my harddrive to the EFI folder on my flash drive but still nothing.
What i did was compile the loader from source using the directions here, then formated a 4 GB flash drive to gpt, and a fat32 File system. Then moved all of the grub items to /efi/grub. Once done i then rebooted, booted to a rEFIt cd and then used it to boot to the USB (the folder is not blessed yet). Then once i got to the loader screen its just a EFI screen, no boot choice Nothing... just a recovery bash. What am i doing wrong... did i do a step wrong, did i compile wrong? What?! could some on PLEASE tell me how to get the EFI grub to make/use a grub.cfg file!
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Mar 5, 2011
I was unaware of the difficulties of installing and booting Ubuntu from the "onboard raid" that the NVIDIA nForce chipsets provide. However, I've managed to get it working reliably with one single caveat:
When update-grub builds the grub.cfg, it refers to all of my partitions as follows:
Code:
menuentry 'Ubuntu, with Linux 2.6.35-27-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(/dev/mapper/nvidia_caifaefg,msdos5)'
[Code]...
So I'm guessing that the whole nvidia_blah,msdos5 is because of that. However, it doesn't seem to explain why Grub would THINK that would work and it in fact does not work. That's the biggest source of confusion on my part.
My questions are as follows: First off, because as an IT person I want to know: Why does this sort of change work? What does changing that device name change in GRUB's behavior? Is there a setting in /etc/default/grub that would change the way it's naming these RAID devices? Is there a value for this setting that would give me the device names that work, as explained above?
If there is no setting change I can make in /etc/default/grub, could I add a sed command on to the end of update-grub or can I make a modification to one of the scripts in /etc/grub.d? What sort of change would be recommended? How would I preserve this change through later package upgrades that would possibly rewrite these files?
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Jun 2, 2010
I've tried Ubuntu awhile ago. I popped the CD then restarted my Mac. Upon restarting I usually pressed the C key. The system boots to the Ubuntu CD but when I get to the language selection thing, I cannot use my keyboard. I had to snag my PC's keyboard from the other room to make it pass through the said window.
Is it normal? I selected the "Try Ubuntu" first to get my feet wet.
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Aug 2, 2010
after loading kernel we get /pci@f0000000/mac-io@17/ata-4@1f000/disk@0:3,/boot/vmlinux : input/output
Every install does this.
What is it with PPC ubuntu lately? Starting with 9.04 it has been nothing but snake bit. And is there any other mirrors beside britain for PPC it seem frequently unavailble or slow.
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Aug 20, 2010
I just installed the latest version of Ubuntu on my intel-based iMac with OSX 10.6 (Snow Leopard), but I don't know how to bring it up.
I partinioned my hard drive for it. I inserted the CD and pressed C when restarting my computer for it to come up, then I installed it on the partition. It was done installing and said the computer must restart now, so I pressed OK. I got a black screen with a bunch of white text saying something about an error. It was pretty much "frozen" (I didn't know how to get off the screen), so I turned off the power manually by pressing the power button. I turned the power back on, but I get no option for Linux. I tried putting the CD back in, and it boots from the CD but it's still the non-installed version. So I thought maybe it didn't install, so I pressed install again. It said to choose where to install it, but my partition of free space said Ubuntu was already installed on it.
I'm really confused and don't know how to get it to start up when I turn on my computer.
EDIT: Here's some more info about my mac incase you need it:
iMac
OSX 10.6 Snow Leopard
Intel
4 Gb of RAM
250 Gb hard drive (29 Gb partitioned for Linux)
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Oct 11, 2010
I'm stuck with a problem trying to boot an Ubuntu Desktop 10.10 x64 CD into a white Macbook (2.1 gen, Core2Duo ) I've installed rEFIt, and synchronized GPT with MBR - all ok.
But when I insert the cd (works ok, the same CD on a DELL laptop ) and boot it via rEFIt, the computer hangs with this console message
Code:
1.
2.
Boot from Ubuntu CD-ROM:_
And I can't go further... anyone knows ?
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Dec 24, 2010
I have an Intel iMac that has about 500 GB of unused space and I was wanting to install Ubuntu or Ubuntu studio or any Linux distro on about an extra 50 - 100 GB of space. I currently have the iMac with a windows bootcamp partition on it as well. Is it too late to partition the main partition and install Ubuntu on it without having to erase it and reinstall the Mac OS and Windows on it? Also, I wanted to try Ubuntu studio on a live CD, but when I hold C and bring up the preboot environment then I don't see an option to "try Ubuntu without changing anything".
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Sep 15, 2010
When I start up the thing says "The symbol 'rtoul' not found. Aborting", then it ether boots from a CD, or beeps offensively at me.
[code]...
I have a GRUB backup pen drive thing, but when I boot from it, it wont accept any keys other than CTRL+ALT+DEL. The partitions can be mounted and are usable, but home is encrypted. I don't want to delete my files.
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Jun 27, 2010
I can get ubuntu to work fine on its own (except for sound, a problem for another day), but I can't get dual booting to work.I'm using this page as a guide:URl...I started out with a clean OSX snow leopard install. I ran bootcamp and shrank my 320G hfs+ file system to 160G. I installed rEFIt, and rebooted twice (you don't see the menu after rebooting once). Then I booted from my 10.04 CD, and deleted the partition created by bootcamp using gparted.When I run the installer and tell it to use the largest continuous space, it makes the / file system in partition #5, and the swap partition in partition #5.
I figured that might cause problems with a MBR partition table, so I partitioned manually, and set up / in sda3 and swap in sda4.When I tried to configure the installation of the bootloader, I had a menu of possible places to install it. I picked /dev/sda3, but then the OK button was grayed out.
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Nov 18, 2010
I would like to triple boot my Macbook Pro. I don't want to use rEFIt. Although it worked on my iMac, it would randomly not load the OS's sometimes.
1. Is there a way to use Boot Camp?
2. I know how to use Mac with the windows xp bootloader. How can i put Ubuntu in too? I got this thing about taking 512 megabytes of the bootloader grub or something like that but I don't get it.
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Jul 31, 2011
is it ever possible to do dual booting with grub(legacy) ever at all!. it is possible provided i take some pain, here is the link of that post [URL] i was coward and weak i didn't try that out then. but i did try it out. now so if u haven't seen the post .... I've installed Fedora 15 desktop(Gnome) with physical Logical volume called vg_fedora lv_root(ext4) ,lv_swap and lv_home(ext4), with 500MB /boot partition and had about 200GB free hard disk space ... so i wanted to install Scientific Linux 6.1 (because our school uses RHEL 6.1)
so, while running the installer I made (added) a logical volume lv_Scientific with ext4 FS and made its mount point (/) and used the MBR /boot which overwrote the Fedora /boot (completely OK and was as expected) i restarted after installation i got SL log in and as per the directions of the thread i copied the boot stanza from grub.conf of fedora 15 (which i already had copied and pasted into a text file and copied it from there)and pasted it into grub.conf of SL you may ask why did i choose same physical LVM too save swap space ... if i had made another physical LVM i had to make another swap ( i like LVM ... its cool)
completely unexpected happened Fedora now boots but not SL when grub starts i get this error 27 unrecognised commad and when i press <enter> i get grub menu with SL and fedora when i press on Fedora it works well i get my fedora login and i did login .. everything works fine but when i press SL it goes to the previous black screen grub error 27
[Code]...
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Mar 21, 2010
Drive will not read on the Mac after booting in Ubuntu!I haven't booted Ubuntu in months (October?), but no hardware changes except for the expresscard. Ubuntu runs nicely in a virtual machine from the Mac side, so I made a fresh VM with Karmic. Couldn't remember the cool apps I had running before (it's been a while), so I booted into Ubuntu to check it out. The HDD was connected and on. (Oops.)It was fine last night on the Mac. I did not notice if it mounted this morning (still in OSX, 10.6.2, Mac sleeping overnight and HDDs on for an unrelated backup). So there is a very slim possibility this has nothing to do with Ubuntu.
Back to Ubuntu, the other external (Firewire 800, HFS+) mounted as usual. Again, I cannot recall if the Fantom mounted. I have not installed drivers for the expresscard/eSATA in Ubuntu (separate driver install is required on the Mac a rarity). I scribbled down the names of the apps I was looking for, and rebooted the Mac to OSX. Where's my HD? Disk Utility sees it as unformatted, and oddly enough, SCSI. If I plug it in via USB, it simply sees an unformatted disk. eSATA is OK with another drive on the Mac.DiskWarrior failed to see the disk entirely with either connection, same in Leopard and even Tiger.Could Ubuntu have confused the partition maps or something? Any thoughts on how I might get it running before I give up and restore the backup?
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May 28, 2010
After four attempts and diverse partition map problems, I finally managed to install successfully clean versions of both Mac OS X Snow Leopard and Ubuntu Lucid Lynx on my old MacBook Pro C2D (2,1) and a new 320 GB HDD, by following these instructions:[URL]
Now, I've got a big partition for Mac OS X (286 GB) and a small partition for Ubuntu (30 GB, as well as two smaller partitions for grub and swap). However, I'd like to shrink the Mac OS X partition to, say, 35 GB, and use the freed up 251 GB as a shared partition to keep files for access from both OSs. But Mac OS X Disk Utility won't let me resize the Mac OS X partition (and warns that it might not be a smart thing to do, as the disk has been partitioned for Boot Camp, etc).
Is there some way I can resize the partition, or do I have to start all over again?
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Jul 17, 2011
I've just tried installing Ubuntu 10.04 on my powerpc. It installed fine, and booted first time ok, but since restarting it just seems to boot into a black screen. My monitor says 'going to sleep mode'
I don't think it's hanging on anything, as I can hear sounds if I play around with the keyboard. Could this be something to do with the resolution being too high? If so, can anyone tell me how I go about changing this?
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Feb 1, 2010
Few days back i was searching for triple booting my mac through this ubuntu forum.and i ran into command name bless
it was like : bless /dev/disk0s3 --setboot -- device --verbose
i ran it on the terminal after booting it from a Leopard installation DVD in a hope to run linux on my macbook(macbook white..intel m/c 160gb HD..2 GB RAM) after trying all the stuff and eventually everything has stopped booting neither leopard nor windows. i can see the grub for ubuntu loading up but after selecting the option for ubuntu, ubuntu is also not working.
i was using refit as well.i cannot even boot from my leopard installation dvd..windows that was priorly installed using bootcamp is corrupted too.
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Apr 26, 2011
I downloaded Ubuntu Lucid...something onto a cd and I booted into it on my iMac G4. It brought me to a screen saying things like live is default press tab for more options etc and when I just press enter, the screen turns white, loads a few things, then it turns blank and after awhile, I hear the Ubuntu startup sound but my screen remains blank.
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Jul 20, 2011
I just formatted the partition that contains fedora 15 using windows.. Now when I attempt to boot my PC the grub bootloader comes up and I cannot boot anything.... The error that I get|| i feel i need a boot command to boot boot win7 from grub... grub propmts me " minimal bash-like line editing is supported. for the first word tab possible list a possible commands completion anywhere else tab list
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Feb 3, 2010
I am trying to install kubuntu on my macbook. I am able to boot from the CD and install fine, but when I try to boot from the linux partition the cursor blinks for a while, then the screen goes blank.I have used the rEFIt partition utility, but when I try to reinstall the grub bootloader as described here: it says "sudo: grub: command not found"When it try "grub", it says:"The program 'grub' is not currently installed. You can install it by typing:sudo apt-get install grub"
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Aug 12, 2010
would putting ubuntu on an external hard drive and booting it from refit work? and would i was starting up my imac 11,2 my ipod was bootable for some reason?
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Jul 15, 2010
I have booted from the .iso cd I made on my Mac last night and was tempted to install it on a 6gb partition that I have on my main HDD but was a bit scared to go past the fourth (or so) step in manual installing where I pick that partition and *do what?* Is it going to install the OS on that partition and leave everything else alone to give me a dual booting PowerMac? It doesn't quite say. I am fearful of screwing up my little ol' machine. Can anyone direct me to something that gives a step by step in manual installation on an already created (HFC+) partition to create a dual booting PowerMac?
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Apr 2, 2010
Is it possible to create a boot CD to boot external volumes on an Apple iMac 7.1 (which has an older firmware version and cannot boot external disks, unlike the MacBook Pro 5.1 which can do it, at least with grub-legacy which is all I'll ever use until EFI boot becomes available). There is some promising stuff on www.pendrivelinux.com, and I'll try it, but the instructions are for Windows, and I am not sure how to translate the menu.lst entry to linux (I suppose it would have to be entered in the "automagic" section). Of course I don't want to create a bootable flash drive but to use my external volumes that already boot on the MacBook Pro without altering them, except for installing the ATI video driver (but I have no problem booting in low graphics mode).
Until karmic there was a trick to make the iMac mistake the external volume for an internal one (the root partition had to have the same UUID as the internal root partition), but this does not seem to work for lucid. Anyway this UUID trick is dirty and causes problems when you want to edit the internal partition (which is the point of the external boot - you get a customized maintenance environment that boots much faster than the CD).
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