General :: Slow Down The Kernel Boot Process?
Oct 14, 2010
I'm trying to upgrad from kernel 2.6.32.9 to 2.6.34.3 and I'm having problems.The boot finished with that old gem "Kernel panic - not syncing: Attempting to kill init !"I suspect that it's something to do with my PATA IDE driver because there have been kernel changes in this area.My problem is all the boot messages scroll off the top of the screen before I can read them and it's no use saying look at dmesg or /var/log/messages because the root fs isn't there - another reason why I think it's to do with the drivers.So my question is, is there some way I can slow down the boot process so that I have a chance of reading the messages ?
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Oct 30, 2010
I wonder and hence ask you whether there is a difference in boot time between two systems when just one of them features grub at the boot stage.
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Feb 22, 2011
I got home today to find that my KDE login screen would not let me log in. It said the authentication process failed or something and I needed to terminate the screen lock process manually. So I go over to another virtual terminal and try to log in. As soon as I enter my user name, a bunch of errors come up and I am unable to log in. "This can't be good" I think to myself, and reboot.
I am greeted by this error upon booting:
The error says that it says it cannot find /sbin/init. I loaded up a Ubuntu live CD and verified that /sbin/init is indeed present and all my other files still seem to be there. I tried booting into arch fallback on grub but that didn't work either. Midway through the day I SSHed my desktop from my phone and started it doing an upgrade. I was able to login.
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Jun 20, 2010
I installed a fresh copy of Slackware 13.1 (stable) on one of my media servers and I am experiencing something strange.... When I power up the machine, I see the kernel booting, no errors, until it gets to the point where it says:
And then randomly freeze there.... Well the machine is not totally frozen because the cursor still blinks. But it will never continue... Like I said, this happens on a random basis... After a reset, it might go through or simply stall at the same spot.
I remember after installing Slack 13.1, I rebooted the machine but forgot to remove the DVD from the player, so the install routine started up, and froze at the same point when it was loading the kernel for the setup programs...
My mobo is a MSI k9N platinum.
I never had this problem before.... (well I never used 13.1 before). Since I got this machine, I used slack 12.2 and slack 13-current with success.
This problem makes the machine extremely unreliable because I intent to use it as a backup and media server, so chances I will WOL the machine and use it remotely... if that happens.
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Jan 6, 2010
I have a Dell XPS M1330 with Opensuse 11.2 and Windows Vista Business in a dual boot hard disk.
I was using Fedora 11 before Opensuse, and it was fast and performed well. However I installed Opensuse because I like KDE 4.3 and this is the best KDE distro.
After the last kernel update my system lost initrd, I restored creating an initrd with chroot, mount and mkinitrd from a rescue disk. After first boot, I reinstalled the kernel update, so the initrd was replaced by the new one created in the update.
However, my system is very slow, I don't know where to look for bad configuration or anything else. The boot process took 220 seconds.
Here is my bootchar,
[URL]
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Nov 9, 2009
The boot process fails using; 2.6.30.9-96.fc11.x86_64. I am able to successfully boot by selecting 2.6.30.5-43.fc11.x86_64 from GRUB. The last few messages I receive when booting using 2.6.30.9-96.fc11.x86_64;
ADDRCONF (NETDEV_UP): eth0: link is not ready
Sky2 eth0 link is up at 100 mps, full duplex flow control rx
ADDRCONF (NETDEV_CHANGE):eth0: link becomes ready
audit (1257757711.701:20095): auid=4294967295 ses=4294967295 subj=system_u:system_r:readahead_t:s0 op=remove role key=null list=2 res=0
audit (1257757711.701:20096): audit_enabled=0 old=1 auid=4294967295 ses=4294967295 subj=system_u:system_r:readahead_t:s0 res=1
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Mar 6, 2010
I installed kernel 2.6.32.9-67 via a yum update this morning. When I rebooted, the machine appeared to freeze with a single blinking underscore cursor. I used a live CD to edit grub.conf and reboot into the old kernel, which started normally. Later, I tried booting into the new kernel via grub again. After about two minutes, the blinking cursor is replaced by the normal boot screens and the machine works fine. This is on a seven year old PC with AMD Althon XP 2000+, 768MB RAM, VIA KT400 chipset and the NVIDIA 173xx driver from RPM Fusion.
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May 1, 2010
When I boot into kernels bigger than 2.6.30 the boot-process stops. I use the PUEL-version of VirtualBox:
$ apt-cache policy virtualbox-3.1
virtualbox-3.1:
Installed: 3.1.4-57640_Debian_lenny
I am searching for iso's for Vbox which come with the guest-additions. They gotta be Debian-based (somehow). My goal is to have got a correct resolution. I tried to create one with live-helper, but that did fail. The purpose of the iso is troubleshooting (rsync, repairing grub, stuff like that).
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Jul 19, 2010
For a diskfull node (the OS installed in a disk), I can use the 'insmod' command to insert a kernel module into the kernel. And after the reboot, the module is still in the kernel. I have a question here: how, when and which kernel module will be loaded in the boot up process for a diskfull node?And for the diskless node, can I use the chroot or some other ways to install the kernel modules into ramdisk, so that kernel module can work when the diskless node boot up? I think it needs certain mechanism to load the kernel like the boot up of diskfull node.
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Mar 24, 2010
I'm not sure what caused it, but it happened right after running 'yum update'. It may be because it installed a new kernel, and there are now two kernels listed in my grub.conf and at boot; 2.6.31 and 2.6.32. System boots through a list of things it's starting up and stalls out at ATL or ADL or ADM maybe. It hangs there for a minute or so then flickers. This happens every time at boot. It's a bit difficult to post more information since I can't get past that part of the boot process, and I can't seem to be able to skip it either. It may be worth mentioning that this is a mini-itx motherboard. Intel Atom 330 1.6, 2GB DDR2, onboard GeForce 9400m. It's a zotac ionitx-a-u. I've installed a fresh copy of Fedora 12 lxde.
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Jan 4, 2011
My computer boots a lot slower after the last kernel update. It boots fine to the log in screen, but after I log in it is slow.
New kernel: 2.6.35-24-generic
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Apr 15, 2010
How can we find out the Process ID of Kernel? Is kernel in itself not a process which is running and handling the overall system calls and program executions?
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Oct 28, 2010
what is the module that is used to process font in Linux kernel?
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May 1, 2010
how to modify kernel source to make its process scheduling to non-preemptive and FCFS ?
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Apr 13, 2011
I have an OLED screen on my laptop that I have configured to show status information. The current driver I have installed in Linux for it is able to display messages by sending them to a script as an argument separated by spaces.Example: the command /opt/asusg50oled/utils/notify.sh Hi Everybody "Hello World" displays on the oled screen:
Hi
Everybody
Hello World
If another message is sent before the old ones disappear and it reverts to status info, it pushes off the top message. Example: less than 30 seconds after the previous example, /opt/asusg50oled/utils/notify.sh "Bananas have potassium" is executed:
Everybody
Hello World
Bananas have potassium
What I want to do is have kernel messages (the kind you see by running dmesg) forwarded to this script. For example, when I insert a USB drive, the following information would show on the OLED screen as they're logged:........
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Apr 23, 2011
as the title,I want learn how it works.
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Jun 8, 2011
I am currently struggling with one of my tasks.I was asked to find a way how to determine how much time an _already running_ process is spending in user and kernel space.E.G. <some tool> <pid>[Control] + [c]<pid> spent 12.1 seconds in user and 1.52 seconds in kernel space.Does something like this exist? Basically I guess I am looking for something similar to time, except that the process is already running.So..a) Is there a tool which fulfills this task?b) Is there a way to write your own software which does the job? Is it even possible to code something I am looking for?I recently found strace -c -p <pid>, but well, this is not exactly what I was looking for.
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Jul 17, 2010
this is what i did i downloaded the latest stable kernel archive from kernel.org and extracted the archive into the download directory (i don't think that matters though) then i downloaded and installed the ncurses archive (needed for menuconfig) then i opened a terminal and navigated to the directory that was extracted from the archive and issues the floowing commands
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Aug 7, 2009
probably after an upgrade, my fedora 11 64 bit take about 1 minutes to start... if I press esc key during boot process I can see that it stuck when start "sm-client" for long tim
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May 6, 2010
The process is slow now after severals updates. here is bootchart image:
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Apr 4, 2010
I have XP installed under Virtual Box and the copy process is very slow, I've spent 20 minutes to copy 3Gb iso image from an external Hdd. I a way to speed up this process?
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Feb 8, 2010
I have OpenSUSE 11.2. I removed bootchart and forgot to run mkinitrd. Now, right at the start of the boot process, I get boot/93-bootchart.sh: line 17: 462 Terminated stopinitrd 5
I Can't find any 93-bootchart.sh anywhere. Earlier I got an error message about non existing /sbin/bootchartd, but I just copied /bin/cat to /sbin/bootchartd using a GParted boot disk. I tried to use chroot with an OpenSUSE boot disk, but mkinitrd can't find the root device, which is there actually (/dev/sda5). How can I make my system boot again? now I managed to re-install the bootchart rpm, using OpenSUSE boot disk and chmod. The system starts again. But that annoying bootchart is still there. I will not try again to remove it. First I will try to figure out, how to disable it during the boot process.
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Apr 19, 2010
I'm using CentOS 5.3. After booting up, where can I find the log file that contains if all services where successfully loaded or not? For example when computer boots you get a list of start services and they can be OK or FAILED. Is there a log file where this information is kept? I had a look in the following directory /var/log/ but not sure which one will contain the informaiton that I need.
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Mar 15, 2011
I've been reading various tutorials of the boot process but still am not clear. I don't care about grub stage 1 and 1.5 at the starting point of when the root filesystem is loaded into VFS(Virtualfilesystem), who is loading it, and from that point on. 1) Does grub load the root filesystem(read only) into VFS?2) Does the kernel load the root filesystem(read only) into VFS?3) Does INIT load the root filesystem(read only) into VFS?after this is concluded....Does INIT or the Kernel create the real root filesystem(rw)...right before the pivot.root
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Dec 20, 2010
i am having problems with a slow boot up when i start my computer. It takes about 3 to 4 mins to load up does anybody know what it could be thats causing that? and how do you go about fixing it? Im using a toshiba netbook nb305, with a intel atom processor
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May 19, 2010
I have just installed the centos 5.3 on my server machine. It looks for a USB media to boot. But I am not able to figure it out what i have done wrong. Why does it asks for USB media?If I have created a dependency of USB to boot, Is there any way i can remove this dependency. Or I have to reinstall the OS again?
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Jun 18, 2011
I have Windows 7 on my Dell Xps laptop, and I want to install Ubuntu or Fedora as a dual-boot. Will that cause my system to slow down?
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Aug 2, 2010
what are the programs or process that gets execututed when a linux start. ie starting from the grub (linux bootloader)
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Jun 29, 2010
For the past few days I was putting effort on understanding the software control flow starting from "Boot loader" to "Linux User space".
I am consolidating the entire process and putting forth in this forum...It would be great if someone can validate this..It might be useful to other new bees too.
Step 1 : Power up the board
Step 2 : The CPU control goes to EEPROM/storage memory where BIOS resides
Step 3: BIOS gets loaded in RAM and gets executed
Step 4: During execution, the selection of Boot device has to be done with the help of BIOS Menu [Blue screen appearance during start up in normal PC's]
Step 5: BIOS shall access the Bootloader stored in boot device [for eg.,Hard disk]. Boot loader is stored in MBR area.
for explanation purpose I take the following configurations
Bootloader = GRUB
Boot Device = Hard Disk
Step 6: GRUB shall be loaded in RAM and gets executed
Step 7: GRUB shall load the KERNEL image to RAM. Kernel image is stored in Hard Disk.
The question of "How the GRUB knows where the Kernel image is stored".
The answer is
1. In the "Grub.config" file, the location of "Kernel Image" and " Ramdisk Image" [which will be discussed later in the section] is being given.
Step 8: Kernel Image followed by Ramdisk Image is loaded in RAM by GRUB bootloader
Step 9: Kernel Image gets executed...During execution, top portion of the code shall make initial hardware initialization and latter part
of the code shall just decompress the Kernel Image
Step 10 : After decompressing the Kernel Image, it shall decompress
the already loaded Ramdisk Image
Ram disk is just creating a temporary hard disk in RAM. The main responsibility includes it consists of minimal driver files, executables, directory structures to created a TEMPORARY ROOT FILE SYSTEM.
This Temporary Root File system shall be used by Kernel Image
1. Execute the executables to access the Hard disk
2. For creating Permanent Root File System in HARD DISK
Step 11 : Kernel Shall look for the file /Linuxrc in Ramdisk. Linuxrc
is a USER script file [not sure]
Step 12: At the end of script file Linuxrc, the Ramdisk shall give the
control to "USER SPACE" [path for writing the script not known]in Linux kernel
Step 13: USER SPACE is the normal shell
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Apr 4, 2010
I am running Fedora 11 and recently, it has been taking longer and longer to boot up. The Fedora 11 Status bar creeps along ever so slowly till eventually I will receive a login screen. I timed it at about 3 - 5 minutes from turning on the computer till I get a log in prompt.
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