Ubuntu :: Can't Boot Except With Noacpi Flag
Dec 18, 2010
yesterday ubuntu 10.04 hanged so i restarted it and i wasnt able to boot again all what i get is a blank screen with a blinking cursor... also windows7 dont boot (hangs during loading) after some googling i was able to boot only in linux by setting the noacpi flag during booting in grub but there was no internet connection (wired connection) i guess that noacpi is the reason ??
what i have tried :livecd: doesnt boot except with the noacpi flag and no internet connection reinstalling grub : doesnt solve the problem replace the power supply : nothing differ
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Feb 14, 2010
GNU GRUB 0.97
Ubuntu 8.04.4
2.6.24-26
Added an SSD (dev/sdc) and decided to move some less often changed directories there. Started with /usr and /boot, leaving / on a primary in the first drive, for now. All started ok, and my changed fstab mounted the right ones, and the system works.
However, grub is actually using the original /boot on / on sda1. I cannot see any way to change this. (Which makes it sorta hard to update the kernel
From grub:
Okay, since it has two choices, I tried to tell it which one to use. But, grub> root (hd2,5) does nothing.
Disk /dev/sda:
what I seem to recall, grub doesn't care about the boot flag on the disk. Nor does it care about primary vs. logical (except GNU doc says "makeactive" only works on a primary?).
The GNU doc also indicates that it looks for a directory /boot on the partition, so if you're mounting a partition as /boot, it also needs to contain a /boot directory under it. Tried that, but no change.
Is my problem the logical partition? Does that prevent "grub> root" from changing it? I'm afraid to wipe out the old /boot and find that I can't start up.
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Jan 24, 2011
In another forum (I each day visit a lot of them) a user was stating that you need to set a boot flag to make the root partition bootable, if you create partitions with GParted in order to install a Linux with GRUB2. Another was suggesting that, if you install Linux with GRUB2, the installer automatically sets a boot flag to the root partition to make it bootable (I don't remember the names). I neither believe the first nor the second thesis and I'm hoping that in this excellent forum some Gurus not only are saying I'm right but also give a comprehensive answer.
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Jun 2, 2011
I just installed windows 7 and ubuntu stopped booting even though it was still there, so I thought I would just change the partition flag to boot. I found out later that I had to create a new mbr but after I changed the boot flag, windows 7 stopped booting and I tried changing it back, but it didnt work. So I was wondering if i didn't use the correct flags or is there another way to get windows 7 to boot again? I was using GParted to change the partition flags and that i am using windows 7 ultimate 64bit
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Jun 21, 2009
I have an HP Netserver LT 6000r - 6cpus (PIII, 700Mhz), 8GB RAM, 4 72GB SCSI
running Centos 5.2 - BIOS and firmware is latest.
Booting Centos 5.2, get errors in boot saying to reboot using the "pci=noacpi" flag. Whe I do this, I get a kernel panic, fatal, and the system will no longer boot, just keeps rebooting. If I boot without the flag, it will eventually come up, without monitor console, screen goes black, but I can SSH into the system, so the OS is running, I just do not have a console to log into.
I am trying to get X running so I can at least get some kind of GUI interface, but I am a neophyte with X. I have Xming, so could anyone tell me what to change on the Centos server to allow X to my winodws box, also, why the recommended pci=noacpi flag does not work, in fact makes thing worse?
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Dec 13, 2009
I had my BIOS complaing that there were no OS. (worked since releaseday of 11.2).
partition setup:
sda1 : primary : swap
sda2 : primary : ext3 : Kubuntu
sda3 : primary : ext3 : opensuse (flagged as bootable)
sda5 : logical
sda6 : logical
opensuses GRUB is primary and Kubuntus is chainloaded.
The problem occurred after I tried to boot kubuntu for the first time since I installed opensuse. Kubuntu didn't boot. so I probably set up chainloading wrong. No big deal, this I can fix.
The big problem was that after trying to boot Kubuntu no OS was marked as "Boot" in MBR. This is VERY strange. somehow the boot-flag is removed!
After setting the boot-flag (with a live-CD) everything works again. I can reproduce this.
I've tried to find answers but could'nt find any.
Is GRUB supposed to remove the boot-flag when chainloading? have I found a bug?
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Apr 3, 2010
Searching syslog to diagnose other problems I encountered this line. As near as I can tell it has nothing to do with any problem I have.
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Jun 16, 2009
Is there a way to boot any current kernel without the nolapic flag on ICH8-based intel T7300 systems? This system works fine with the last 2.26 kernel from FC8, but due to EOL of the security updates I tried to install FC11 and FC10. The first sign of trouble is that their installation only works with acpi=off or nolapic options. As those options disable either fan-control or the second cpu-core I consider them undesirable. Is there a recent correctly working kernel available? Or do I have to downgrade to a distribution that uses a 2.26 kernel?
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Aug 26, 2010
see some histry here: [URL].. I have managed to get the 10.04 Live CD to boot on an HP All-in-one 200-5020, using "noacpi". However I am unable to get wireless to work. Would this be an issue with the PCI Express slot that the wireless card is installed in? I did use 32-bit, should I be trying 64-bit? If I install using "noacpi", does this mean that ACPI funstionality won't work on the machine once Ubuntu is installed?
Thanks for your help - trying to work out if I persist, or take the machine back to the shop (would prefer not - I like it - but I don't want to have to live with Win7).
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Apr 19, 2011
I'm trying a recursive search -- only PHP files -- and yet grep is searching SQL files too.
Code:
sneakyimp@Ubuntu-64bit:/var/www/site$ grep -irl --include='*.php' 'car_images' *
2011_02_11_dump.sql
car_images_pending.sql
client/search_results.php
[Code]....
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Jul 19, 2010
What does the mkdir -p flag do? i.e the '-p' part?
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Oct 15, 2010
What does the -i flag mean in rm i my_file?
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May 26, 2010
I just bought an Eee Box with Red Flag Linux Desktop 5.0NE. My intention was to use it as a backup server at home to backup files and photos, etc.
How to I get to a graphical user interface so I can start to know what I'm doing?
When I switch on the machine, it says:
Red Flag Desktop 5.0NE
Kernel 2.6.21.0-22 on an i686
localhost login:
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Apr 6, 2010
From the man page for sudoers (RHEL5.4), I notice that the default value for stay_setuid flag is 'OFF'.
In RHEL4.8, th man pages don't specify the default value.
What is (maybe) the default value of 'stay_setuid' in RHEL4 ?
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Jan 9, 2010
Little explanation: OEM HP pcs come with an HP_RECOVERY partition which contains an installer which will wipe the HD and install vista (shivvers) Now despite how much I looooove vista, I was wondering why the OS_TOOLS partition shows up in places and recovery doesn't... especially cause niether have a hidden flag...
(As a side note, what the hell does OS_TOOLS do? google yields no answers)
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Feb 15, 2010
A week or two ago I installed Ubuntu Server 9.10 on a Intel DG945SEJT-based machine with two WD RE2-drives. I used unetbootin-windows-408.exe to to prepare a USB stick with the 32 bit version of the server version of Ubuntu. The installation went smooth without any problems.
Now when I'm trying to do the exact same thing to an almost identical server (larger HDD:s) I can't change the bootable flag to "on" on the physical raid partitions I create to host /.
I use the the following partition scheme: 10 GB /, 4 GB swap and the rest as /home. They're all on software-RAID1. Last time I did this (and many times before that) I was able to set the flag to "on".
When I press enter it just shows "updating filsystem.." etc. for some second but then nothing happens, the parameter is still on "off". This causes the whole installation to fail in the end due to an error when installing GRUB -> "can not install grub in /dev/sda "fatal error"".
My only conclusion is that the installer downloads some new files from the internet which causes this problem, as I said - nothing else is different except the harddrives (WD RE4-GP).
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Mar 10, 2010
I want to append data to a file where immutable flag is set..So i have tried this command chattr +a file_name to append data..But i am unable to append the data..
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Sep 6, 2010
Well I currently have a windows partition currently formatted as ext3 which has the partition flag bootable (It previously had Windows Vista on it). I also have a windows partition with NTFS filesystem with Windows 7 on it which is not bootable because the previously mentioned partition became formatted by me. And I also have more partitions for Ubuntu, which is currently the only OS working.
To show it visually: [URL]
So my question is can I delete the partition called "Inter" and recreate a new partition and format it again with ext3? It has the partition flag bootable, won't I loose all of the partitions this way? It's also the primary partition? Is there a big risk?
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Jun 15, 2011
I've installed MongoDB and I want init to start the database with the --journal flag. I'm quite rusty on how init works, but I know it involves the /etc/init and /etc/rc directories.I've found /lib/init/upstart-job and someone in the chat is suggesting that I just edit that bash script, but I can see it's involved with more than half the system service, so I'm a little hesitant to edit it. In fact, I'm pretty sure if I followed that advice I'd really screw up my system and then the person "helping" me would just stop responding.
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Oct 31, 2010
Is the command "ls -d" meant for only listing directories? Because i tried it and it ALWAYS display just a blue dot. If not what is the correct way to show only directories? I.e. MSDOS equivalent "dir /ad".
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Dec 1, 2010
I recently install 64-bit OpenSuse 11.3, the first time I'd used Suse 64-bit - I have to say it has been all good so far, which is great. However, today I was experimenting with a tool that tests vulnerabilities which should be remedied if using an NX capable processor. I am running 2.6.34.7-0.5-desktop on an Intel Core i7. I downloaded a 64-bit compatible version of paxtest from :
[URL]
Running it I was surprised to see that the NX capabilities of the CPU do not appear to be honored. Here are my results:
PaXtest - Copyright(c) 2003,2004 by Peter Busser <peter@adamantix.org>
Released under the GNU Public Licence version 2 or later
Mode: blackhat
Linux callandor 2.6.34.7-0.5-desktop #1 SMP PREEMPT 2010-10-25 08:40:12 +0200 x86_64 x86_64 x86_64 GNU/Linux
Executable anonymous mapping : Killed
Executable bss : Killed
[code]....
From my understanding, NX was one of the big deals a few years back and was a main feature provided by the PAE kernel. I would have thought the default 64-bit kernel would have included NX support. I also thought per NX bit - Wikipedia, the free encyclopedia that NX support has been in the kernel since 2.6.8 I looked in config-2.6.34.7-0.5-desktop but did not see anything related to NX/XD config wise, other than DEBUG_NX_TEST What am I missing here? Shouln't this test fail in the Executable [bss, stack, etc.] tests on 64-bit with a NX capable processor?
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Mar 25, 2011
I found that this tests if a give filename is a directory or not:
Code:
-d "$FILENAME"
But what test for not a directory? I tried
Code:
-D "$FILENAME"
But this doesnt work?
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Dec 24, 2010
If /tmp and /dev/shm partitions are mounted with the noexec flag then this prevents someone from executing something in those partitions.
Example:
You will get permission denied
However if you execute that same script like this:
Then the script gets executed which makes the noexec flag useless.
If there any way to prevent this bug/vulnerability?
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Jan 5, 2010
After updating to Karmic, Synaptic shows almost all of my installed packages in the category "Installed (manual)", including about half of the packages that belong to a clean Ubuntu installation (e.g. apparmor, apt and hundreds of others). As a result, I can't easily get a list of those packages that I did indeed install manually and may want to remove. Is there a way of removing the "Installed (manual)" flag from all packages?
If I could do this, all packages that do not belong to the core Ubuntu system should show up as "Installed (auto removable)" and I could individually mark only those as manually installed that I really still need and let apt/synaptic uninstall everything else. I know that with today's hard disks, disk usage of installed packages is not an issue. But those packages accumulate over time and need to be updated with every security update and every ubuntu dist-upgrade, wasting time and bandwidth.
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May 9, 2010
I am getting the following errors continuously whenever I update/save a config file in /etc/
Code:
error: line 29136: bad flag vector alias
error: line 29137: bad flag alias index: 0
The config file got updated though. I am just worried that this may be something bad.I update the files using the command sudo gedit <config_file>. I haven't encountered this before in Karmic. Has anyone encountered the same error messages? This might be a problem with gedit. I tried doing the following and the error messages also came up:
1. In terminal, gedit foo.txt
2. In gedit, type anything and save
3. Terminal will show the following:
Code:
...
...
error: line 19234: bad flag vector alias
[code]....
Running artha from the terminal also causes the error.I've managed to get the top-most line of the error:
error: line 15: bad flag alias index: 0
error: line 15: bad flag vector alias
The hardest thing about this is I have no idea what's causing it. I thought it was gedit but running artha (from the terminal) also causes the error.Sigh. This is a clean install of Lucid, which again makes it even harder to know what causes it.
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Oct 12, 2010
I was thinking to do my music producing completely on linux and found a plethora of good tools for it. The thing is I have two monitors and instead of launching manually every little app each time I feel creative, I want to make a script that launches all my favorite apps.
So long I have written this little bash script:
Code:
#!/bin/bash
#Start my audio programs for music production
(qjackctl --start)&
(hydrogen --nosplash)&
sleep 1
ardour2
So what it does is that it starts the jack server, then hydrogen and lastly ardour2. The thing is that I want hydrogen to start in the second monitor but don't know how. I have devilspie but I didn't have any luck on finding some command to choose display. I am aware of the --display flag that some programs have like firefox but hydrogen doesn't have it. Btw I use a different X server on each screen. is there a universal way to launch ANY kind of program on a specific display?
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May 2, 2011
I'm running Ubuntu Server 11.04 on a home PC as a local-only file and web server for some private projects.After a few minutes Ubuntu will stop responding to the network and a cold reboot is required to re-enable the NIC.I've been able to stop the above occurring with a user logged in and constantly pinging the gateway, although this is obviously undesirable.
I read here and elsewhere that a fix is to set acpi=off in grub. I have done this but now instead Ubuntu will not boot and shows the message:
do_IRQ: 1.55 No irq handle for vector (irq -1)
Disabling IRQ #34
and hangs there indefinitely. The system will boot fine if I revert the changes but obviously the sleep problem remains.The BIOS does not have an option to disable ACPI, just select S1 or S3.Is there anything else I should be looking for in order to disable sleep? Otherwise the system is working fine, and when it's awake I haven't had any other trouble.
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Jun 29, 2011
I have Ubuntu 10.10 installed on one (physical) hd and on the other one Windows. On both drives grub is installed to boot both operating systems. When I wanted to install SP1 for Win 7 I had to add a bootable flag to the partition from which Windows boots, otherwise the installation of SP1 does not work. I did so by booting into Ubuntu and using gparted to add this flag. After doing so the update for SP1 worked without any problems.
When trying to boot back into Ubuntu grub complained that it couldn't find the kernel anymore! I tried to boot into a Ubuntu minimal cd and to restore grub using chroot, update-grub and grub-install which didn't work. I still had the problem that it was Unable to boot Ubuntu putting me in some minimal system called initramfs. It seems however that the uuid of the partitions changed. I guess this happened when I added the bootflag to the windows disk.
Next thing I tried was to tell grub not to use the uuid for loading the kernel by uncommenting something in /etc/default/grub. Then I got the kernel booting but it suddenly stops (I guess when it is trying to mount the root file system) saying that the concerning uuid does not exist putting me into initramfs again. The strange thing is that there I coulnd't even manage to mount the root partition using /dev/sdb1 (on which it is in my case). Any way to restore the system again without having to reinstall it.
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Jan 19, 2010
I have tried to install both wubi ubuntu and linux mint8 both times they start I see the new desktop briefly then I get a "no signal" flag on my display But I can hear the startup chime as the program finishes loading!
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Apr 15, 2010
I have a created an ext3 partition and when i tried to set is hidden flag, there seems no effect. how to set the hidden flag of an ext3 partition?
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