Ubuntu :: GRUB Kernel Options ?
Mar 11, 2011
I have Kubuntu 10.10 and Back Track 4 (BT4) Linux installed on my system. I think BT4 is based on Ubuntu 8.10.
I have the following line for my kernel boot options in /etc/default/grub file.
Code:
I need the rootdelay option for the Kubuntu 10.10 kernel but the BT4 kernel does not need it. But looks like setting this has a global effect and it waits for 80 (seconds ?) even when starting the BT4 kernel which is not required.
So is there a way to give the rootdelay option only to the Kubuntu 10.10 kernel and not to the BT4 kernel.
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Oct 21, 2010
my grub2 start-up has every kernel for ubuntu since 9.10 in the list. can i safely delete these older kernels without screwing something up? also, where do they live?
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Mar 1, 2010
I updated my system and then this popped up:
I picked the option that is selected, then I restarted pc to apply updates and now my "grub" menu has 2 extra options.
The first 2 are the new ones.
I don't know what its for.. but when I start up the computer I pick the Ubuntu, Linux 2.6.31-19-generic
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Aug 19, 2010
I have a problem with my touchpad, sometime it doesn't work at start-up and this happens randomly.
I have looked around and maybe I could solve this with the procedure described in [url]
I'd like to add the equivalent of to kopt in the old grub.
I looked into the grub2 documentation, [url]
I am not even sure if I have to modify /etc/grub.d/40_custom or 10_linux.
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Feb 25, 2010
Is there a way to access the list of boot options from Ubuntu? I don't want to change the options, just have someone access the information, then copy and paste it in an email so I can see what the heck is going on with their computer.
The problem is this:
User has 2 physical drives.
Drive 1 has XP
Drive 2 has another version of XP on it as well as Ubuntu.
We want the computer to have the option to boot into XP on Drive 1 and Ubuntu on Drive 2. Booting into XP on Drive 2 is an option.
We can get into Ubuntu, and XP on the 2nd Drive, but not XP on the 1st drive.
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Jul 1, 2011
I recently switched my laptop from Ubuntu 11.04 to 10.04.2, and during the process, I used GPARTED to partition the drive so that I could have both versions installed simultaneously while I transferred files and settings and such. A few days ago, I removed the 11.04 partition, formatted and added that disk space to 10.04's /home partition. However, when I boot up, GRUB still gives me the option of loading into the newer 11.04 partition with the newer kernels. How do I remove those options from the GRUB menu? I checked the Ubuntu GRUB help pages, but didn't feel confident that I could do edits without messing up the 10.04 boot settings.
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Jul 14, 2011
I have a multi-boot, multi-purpose machine and I'd like to change the names of some of the options in the grub boot menu.
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Nov 10, 2010
I am looking to compile a kernel for my system which is a home built machine. This machine is stable and has not had any hardware changes in the past 2 years. I am trying to figure out exactly what modules and options to include in my custom kernel. Is there a way to see what modules are actually in use on my system and build a custom kernel based on that?
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Mar 23, 2010
The problem I'm facing is that I can't use my headphone. Sound works, but not the headphone. See my ealier thread. It was suggested to edit the module options, but I don't quite know which buttons to push.
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Jan 7, 2011
Code:
How do I know what option means what to compile my own kernel? How to find support for different hardware in this mess (and exclude it)?
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Feb 25, 2010
I was having some problems with a "memory exhausted" error, I have come to find out that my kernel is not built for largefiles. What options in my .config do I need to have enabled for Large File Support? I diff'd my current .config and Slackware's huge config, because I found out the huge kernel could handle ~3G files, but did not see anything that looked related to largefiles.
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Feb 14, 2011
My ubuntu bootloader has 3 kernel to choose,
Ubuntu 2.6.35-26-generic
Ubuntu 2.6.35-25-generic
Ubuntu 2.6.35-22-generic
All can boot into linux, when I use uname -a to check, it has its name as above.
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Feb 6, 2011
I am looking at this computer, running Ubuntu 10.10 and Windows 7, Home Premium with GRUB 2 as the boot loader. I am looking to get to the Windows 7 advanced boot options screen; however I think it requires the windows boot loader to do so.
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Jul 8, 2011
I am running the RedHat 7.3 install off a CD to put the system on an IDE flash drive. The flash drive appears as /sda1 on my system during installation. When I install the bootloader from the install CD it gives me the option of MBR on /hda which I do not want do. I select /sda1 and it puts the bootloader on first boot sector (not the MBR?) Although the installation works, is what I am doing creating a bootable primary hard drive? The flash IDE drive needs to be installed in an embedded system so my installation options are very limited i.e. the system does not have a CD-ROM or floppy to boot from. Are there options to put GRUB on the MBR of /sda1 during installation? Such as, with fdisk or the "force disk primary" option? Or, doesn't it matter?
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Dec 5, 2010
I'm just wondering what the options are if one wants to try a 'newer' kernel and/or XServer version.
Either on an installed system or virtual machine (for e.g., Squeeze in VirtualBox).
On an installed system, on Debian Sqeeze (or Testing), if one wants to upgrade to 2.6.36 kernel and/or XServer 1.9, what are the options? I noticed that 1.9 is available in experimental so one has to enable and load the experimental package repository?
As for the kernel, I guess there's a few options? One includes installing the liquorix kernel? Best choice/alternative is compiling?
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Jun 27, 2010
I'm building the 2.6.34 kernel and I notice some interesting options, which you may want to consider including in the build, if you are building it:
Code:
Code:
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Apr 18, 2010
I want to compile a kernel to add a few options that are not enabled in the huge-smp-2.6.29.6 that comes with slackware. specifically, i want to add TASK_DELAY_ACCT and TASK_IO_ACCOUNTING so that I can use iotop. I just want to add those 2 options to the new kernel, everything else I'd like to keep the way it is as the system has been running just fine. Will running 'make menuconfig' in /usr/src/linux default to the options that are used in the stock kernel?
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Feb 6, 2010
Would like to eliminate from the Grub menu of startup options all but the latest kernel update? Have made some attempts, but don't have authority is the message.
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Mar 29, 2010
This is no huge problem, but it is rather annoying to me. I am using the 10.4 beta, and whenever I get a large update (like a updated kernel) GRUB adds another boot option to the menu (I'm dual booting Vista and Ubuntu.) So my GRUB menu looks something like this when I turn my computer on:
GNU GRUB version 1.98-1ubuntu2
Ubuntu, with Linux 2.6.32-18-generic
Ubuntu, with Linux 2.6.32-18-generic (recovery mode)
[code]....
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Dec 3, 2010
I am using Ubuntu 10.10, manually installed, on a Dell Studio 15 laptop, dual booting with Windows 7.While a few kids were playing nearby where I was working, one of the pillows they were playing with hit my laptop's screen and moved the screen's hinge backwards, applying pressure past where the hinge ends. This didn't seem to cause any physical harm to the computer, but I moved away from where they were playing, and in the process, shut the laptop, putting it into sleep mode. I opened the laptop and entered my password to unlock it. About half a second after entering my password and displaying the desktop and open windows, it brought up the password prompt again, as if I'd just opened my laptop up and removed it from standby, although I had not in fact touched it since I had entered my password a mere half second before. I thought that that was strange, and then attempted to continue my work. However, although the mouse worked fine, when I attempted to apply a keyboard shortcut (Ctrl+Alt+2, which runs a 2-finger scroll script and has to be run every time I take the computer out of standby), Ubuntu didn't register it (I didn't touch the keyboard otherwise, although I should have checked whether it worked all =).
I tried it again, and it still did not apply the script. Then I thought, "Oh, the pillow must have knocked something out of whack. I'll restart." When I restarted, grub loaded as usual, but the timeout ("loading the primary in Xs." sort of thing) that it usually displays did not display this time. I didn't notice it at the time; I selected Ubuntu, and it appeared to be loading it, removing the grub menu, but then hung. I waited 5 minutes for the computer to display the login screen, but it did not, so I restarted again, thinking that it might just be something stupid. It didn't work again, hanging again. I tried this with both the most recent linux kernel and the second most recent kernel, neither of which worked. But what was interesting is that Windows 7, which is also on the grub menu, loaded and displayed perfectly, as did GRUB Invaders, a game that can be loaded directly from grub.After this little escapade, I thought something was just wrong in grub.cfg, and it somehow wasn't mapping the Ubuntu menu entries to the appropriate OS and kernel. So I loaded up a live CD, and attempted to look at the linux entries. These are the menu entries 10_linux, 00_header, and 20_linux_xen.
10_linux:
Code:
#! /bin/sh
set -e
# grub-mkconfig helper script.
# Copyright (C) 2006,2007,2008,2009,2010 Free Software Foundation, Inc.
[code]....
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Dec 29, 2010
I just want to confirm something before I mess with the bootloader. It kind of scares me to rewrite my MBR. It appears that the grub version that comes with Ubuntu 10.10 drives its menu generation from /etc/grub.d/* when you execute update-grub. If I want to put windows first in the list, could I just rename "30_os-prober" to something like "09_os-prober" and run update-grub? My reason for this is every time Ubuntu updates the kernel, it adds 2 new entries to grub's boot menu. It's easy enough to remove these via the Synaptic Package Manager, but that means for at least 1 boot cycle, my default OS gets messed up (Windows). I have to leave it as the default for others that use the computer, even though I prefer Ubuntu.
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Mar 31, 2010
i am running windows and fedora 12..both are working smooth...today when i switch on the laptop in morning i discovered that it automatically start windows..when again i restart it..it does not give any option to me for selecting which OS to run..i have seen grub.conf file it is right...i have done nothing...windows is booting smoothly..how can i boot to fedora 12 without reinstalling.
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Dec 28, 2010
i installed ubuntu 10.10 netbook edition and it installed fine, i updated everything on and now when it starts i have 2 versions of it to select from 2.6.35-22 and 2.6.35-24 as well as the recovery versions of it. how do i remover these options from the grub menu? in addition to this i also have a question about updating python on it, its running version 2.6.6 and i need 3.x. how do i upgrade it?
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Jan 4, 2010
Over the past few days I have been trying to install an older kernel (kernel 2.6.28.1) on ubuntu 9.10 64-bit WUBI installation. I compiled, installed, and updated my grub for the kernel. When I reboot, the grub menu correctly gives me the option of booting into the older kernel but when I do so I receive the following error message:
error: you need to load the linux kernel first.
I am at a complete loss on how to fix this. I even downgraded grub but I still get the same error.
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Nov 4, 2010
I have an issue that is fixed by changing the lpfc driver to run using MSI interrupts. This is done by adding "options lpfc lpfc_use_msi=2" /etc/modprobe.conf.local file.
Is there a way to make this change using kernel boot parameters?
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Jun 29, 2010
Can i add another kernel 2.4 in grub while kernel 2.6.31 of ubuntu 9.10 exists
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Nov 28, 2010
I have a PC with three partitions: C, D, E. The C: and D: partition are NTFS and C: has Windows XP on it. D: holds my data files and folders in the Windows environment. E: has CentOS version 5.x. The machine is dual bootable. When booting up Grub gave me the options to boot to CentOS (by default) or to boot into Win XP (by selecting it).
Recently I used Partition Magic to resize the D: partition. I shrank the D: partition. The freed space space was then used to create a new NTFS partition.
After the partitioning was completed, I rebooted the machine. But now Grub is having a problem. It does not display the list of of bootable OS options any more. Instead there is just a black screen with the prompt:
grub>
What am I supposed to do here?
I am afraid that after I ran Partition Magic somehow Grub is messed up. How do I recover the previous boot options? Or at the minimum, how do I make the the machine to boot into Windows XP?
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Mar 21, 2010
I tried to install debian on my system using a small image at first that would download all the necessary components during the install. It loaded everything except Grub, and wont boot. I need to rescue this as the downloading of all the components took ages and I don't want to do that again.
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Jun 1, 2011
I'm having trouble getting PPTP to work on my Gentoo system. Kernel options relating to PPTP:
Code:
CONFIG_PPP=y
# CONFIG_PPP_MULTILINK is not set
# CONFIG_PPP_FILTER is not set
CONFIG_PPP_ASYNC=y
CONFIG_PPP_SYNC_TTY=y
CONFIG_PPP_DEFLATE=y
CONFIG_PPP_BSDCOMP=y
code....
I've tried emerging with and without the mppe-mppc flag on ppp, as well as putting the PPP options from the kernel to modules. No luck.
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Mar 19, 2010
So I have the burned ubuntu CD, and I'm attempting to install it on a system that has one HDD with XP/Vista on it, and another that is completely formatted and unpartitioned. However, when I boot to the ubuntu CD, I can use the menus from the bottom, and select the language when initially prompted, but I can't select any of the menu options except for boot from first hard drive.
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