for questions concerning Ubuntu's kernel, including compiling and questions relating to modules

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do-release-upgrade: Failed to configure linux-image-generic (previous on backports kernel)

Because of hardware issues I was on backports-3.11-rc3-1 with Ubuntu 13.4 64bit. Now, after a while I initialized do-release-upgrade. The process stopped with the message that the configuration of ...
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22 views

Ubuntu server 12.04 made into squashfs (toram) and frequent start-up kernel panics

I've got a Ubuntu server 12.04 64-bit packed into squashfs and booting into RAM using toram option. When I reboot the machine I get a kernel panic 3 out of 5 times, sometimes multiple times in row, ...
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9 views

Recompiling the kernel after modifying the “irq.c” Module

I modified the irq.c file in the kernel by including several printk() statements to trace some values that I wanted to recovered. Logically, after modifying the irq.c file I attempted to recompile the ...
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28 views

Problem installing Lubuntu 13.10 [Kernel Panic]

Hello ~ I've had trouble installing Lubuntu 13.10 [64bit] from a usb drive. [I used Universal USB installer] I boot from a usb drive, menu loads up and I can pick with arrow keys - but then as soon ...
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10 views

Dell XPS 13 kernel issue

I've bought Dell XPS 13 9333 and I've upgrade to latest ubuntu 13.10. Then I've realize on book my machine can't never end it's task. It's just freeze after some time on booking screen (Ubuntu image ...
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26 views

special parameter xforcevesa to the kernel

is possible to know how works the special parameter "xforcevesa" when is added to kernel? how init-scripts can use vesa driver when X start ? this is for educational purposes
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34 views

LinuxTV PCTV DVB-S2 461e not recognised

I have a problem with PCTV DVB-S2 Stick (461e). I am running Ubuntu 12.04 and have installed linuxtv using: git clone git://linuxtv.org/media_build.git cd media_build ./build ...
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14 views

cannot Install VMware 4.0.6

I'm using the Ubuntu 3.11.0-19-generic kernel . I'm trying to install vmware player 4.0.6 while installing i'm getting this error message "Unable to start services. See log file ...
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78 views

The path “” is not a valid path to the 3.11.0-19-generic kernel headers

I'm installing vmware tools and am getting this message. I tried "sudo apt-get install linux-headers-generic" which was suggested in another post but it did not help. What needs to be done so that the ...
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14 views

How to fully encryped ubuntu on the Beaglebone Black

... or at least access LUKS partitions from a unencrypted system. In the past my BBB crashed during file copying on encryted SDHC that actually did mount. In the later versions from ...
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58 views

error installing linux-image-3.11.0-19-generic: “kernel does not support non-PAE CPU” although CPU has PAE

I am running Ubuntu 12.04 Kernel 3.11.0-15-generic on my IBM T42 which has a Pentium M 1,7GHz Processor which has 32bit physical adress extension (PAE). Now I cannot install latest security updates ...
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32 views

ureadahead main process terminated with status 5

Having struggled for the last few days with a kernel panic, this is the new error I am getting on boot. A restart doesn't help. I have access to the server in rescue mode where I can mount the ...
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62 views

Kernel Panic has ruined my entire server, can't identify the problem

As of today all my websites have been down and I cannot connect via SSH/FTP or ping the server. The only access I have is through rescue mode. Apparently the server cannot boot normally due to 'kernel ...
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42 views

Unable to build kernel module in VMware 7

Unable to build kernel module. See log file /tmp/vmware-root/setup-7178.log for details. Apr 05 11:36:38.648: app-3076208320| Log for VMware Workstation pid=5555 version=7.0.0 build=build-203739 ...
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23 views

Loading a proprietary disk driver into Ubuntu Server Initramfs

I have a Revodrive 3 X2, and I am installing Ubuntu on it. I followed the guide by Alex Burgess for a complete fresh copy. I also topped this guide (which works perfectly when using the exact ubuntu ...
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16 views

Problem during kernel configuration during installation

Installation was about 75% done, when it lingered on kernel configuration. I got a black screen full of code, ending with: [ 594.182790] init: lightdm main process (26464) terminated with status 1 ...
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81 views

kernel panic - not syncing attempted to kill init exitcode=0x0000008b

I get kernel panic error when I run insmod command to add a module to kernel I want to intercept a clone syscall but after run insmod command, when I run other command like ls I get this error: ...
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86 views

Netflix (Pipelight) Low Frame Rate With RT-Preempt Patch

Running Ubuntu 13.10 stock, I was getting horrible "jitter" across the entire OS. Meaning that, videos would not play smoothly compared to a TV set, Compiz effects were not smooth, games were not ...
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82 views

How to resolve dependency problems with differing versions between linux-server and linux-image-server

I'm new to linux system. Recently I have noticed my /boot is 100% full and i couldn't update my system. I google for solution for free my /boot space. I found the document How do I free up more space ...
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9 views

How does the host assigns driver to a USB device?

Where does the enumeration happen? In /usb/core/hub.c ? After the enumeration occurs (the host detects and identify the USB device), how does the host loads the respective driver. Is it by using the ...
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33 views

Creating Virtual Machines using ubuntu-vm-builder

I'm currently trying to install virtual machines on my Ubuntu Server 13.10. I followed the instructions from this guide. I was able to install and check if my machine is is supported how ever when I ...
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76 views

Unable to Cross Compile Hello World Device Driver for ARM

I've been trying to build a basic hello world device driver on my Virtual Box installation of Ubuntu 13.10 for a development board running an ARMv5 processor. I know I need to cross compile the ...
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26 views

How do I replace the TPM driver with my own version

I'm new to linux. My goal is to load my own TPM driver. I'm using Ubuntu 12.04 LTS with kernel 3.13.7. How do I remove the current driver (especially TPM_TIS)? How do I Make my own (command-wise) and ...
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174 views

Error! Bad return status for module build on kernel: 3.8.0-37-generic (x86_64)

After updating some packages in my machine (using aptitude), I got the following error: Error! Bad return status for module build on kernel: 3.8.0-37-generic (x86_64) Consult ...
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16 views

Read CPU serial, boot kernel only on match

I have been advised to come to you here. I'd like to bind a kernel to a specific CPU's serial number on a Raspberry Pi. The serial number is available at runtime to userland through /proc/cpuinfo and ...
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25 views

Where I can find /sbin/hotplug in my kernel source

I am reading hotplug events. And I want to enable automatic loading unloading module, when a new device is added. For that I read that kernel does it using /sbin/hotplug script, but I am not able to ...
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11 views

Installing Linux Kernel Modules without plus + (on ARM)

Installing Linux Kernel Modules of Version 3.4.79, but I always get a foulder with 3.4.79+. How can I install it without the +? Doing it with make ARCH=arm INSTALL_MODULE_PATH=dest modules_install
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23 views

Capture hrtimer interrupts with linux kernel module .. possible?

I would like to be able to 'capture' an hrtimer interrupt with a linux kernel module and replay the interrupt at a later period in time. Any thoughts on how to go about doing this? Use case: A ...
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104 views

kernel panic not syncing vfs unable to mount root fs on unknown block

Since a couple of days, i can't boot. I have a kernel panic error : And I used boot repair to generate the file below: http://paste.ubuntu.com/7118756/ I tried many things i find on the web related ...
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68 views

Cannot fine syscall_32.h , header missing

When I run 'make', i get an error saying: make[1]: *** No rule to make target `/usr/src/linux-headers-3.8.0-29-generic/arch/x86/syscalls/syscall_32.tbl', needed by ...
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68 views

Kernel panic - not syncing: VPS: Unable to mount root fs on unkown-block(0,0)

When I turned my computer on after doing the suggested updates, it did not go to the usual GRUB menu and instead I got a black screen with this message: GNU GRUB version 1.99-21ubuntu3 Minimal ...
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15 views

Kernel compiling question about “.config” file

I am in the middle of compiling a new linux kernel targeted at my Acer Aspire One Laptop with an Intel Atom processor. I'm just playing as a self teach exercise. So far, I have made my new config, ...
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16 views

In sysctl.conf settings, what is the difference between 'all' & 'default'?

In context of sysctl.conf settings, what is the difference between (all vs. default) like net.ipv4.conf.all.accept_source_route & net.ipv4.conf.default.accept_source_route in sysctl settings ? ...
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39 views

How to good and easy add all kernel required modules to /lib/modules/$(uname -r) in Ubuntu Core deployment?

I would like to deploy "Ubuntu Core" (13.10) following the deployment instructions of "Ubuntu Core". This suggests - after installing linux - to add the kernel required modules to /lib/modules/$(uname ...
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73 views

Why won't my previous HDD mount in 12.04?

So after closing the lid one morning and heading out, I come back to my laptop running Ubuntu 12.04, and I'm booted to the grub menu, being asked to choose which kernel I would like to load. I choose ...
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15 views

Is there instruction counter at kernel level

Is there any kernel data structure / counter which stores the number of instructions executed after OS boot up till now ?
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21 views

Letting system updates know that I already have a newer kernel

I am running Elementary OS (basically Ubuntu 12.04). I had to upgrade my kernel to 3.13. I did this using dpkg. However, system updates still shows kernel 3.2 as available. Is this because apt does ...
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165 views

Grub-Customizer not saving the changes after kernel upgrades

I'm running into an annoying problem with Grub-Customizer (4.0.4) every time I update the kernel versions. After the kernel update I normally open Grub-Customizer to accommodate the new kernel ...
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16 views

What does noirqpoll kernel option actually do?

I've recently been troubleshooting a boot issue with Ubuntu. First I tried 13.10, and when that booted wrong I am now on 14.04 development. What would happen is that my computer would crash shortly ...
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44 views

Ubuntu 12.04 ATI Driver

Good day, So i just installed Ubuntu 12.04 LTS (i'm now to Ubuntu and even Linux systems, but i've bored of the lot of brainfuck with Windows systems) So, i installed Steam and then 2 games (Left 4 ...
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25 views

Ubuntu 12.10 does not boot properly

I have Ubuntu 12.10 running on HP ProBook 4430s. I have been using it more than a year. This morning I switched it on, the screen got stuck before it boots - it was black and white terminal like ...
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54 views

Sound card is not working on Ubuntu kernel version 3.11.0-12

From the /var/log/syslog file, the kernel stack trace. Mar 8 13:03:20 rjk-Inspiron-1525 kernel: [ 1931.384971] ------------[ cut here ]------------ Mar 8 13:03:20 rjk-Inspiron-1525 kernel: [ ...
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14 views

Gnome2 Network applet issue - annoying another icon appears.

I'm using Ubuntu 13.10, installed the gnome-2 mate desktop environment. One thing that annoys me the most is the network icon in the panel. Ok, so the network applet runs when the system starts. To ...
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201 views

ubuntu 13 linux-image won't upgrade

I just did software updates that included linux-headers for which there are no image files in /boot. The only image and related files in /boot are for version 3.8 /boot/abi-3.8.0-30-generic ...
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23 views

Error while installing kernel-headers?

I have a Linux kernel module which I am trying to compile. The module needs the installed kernel headers to install and is looking into /lib/modules/$uname -r/build folder which is not present. I ...
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125 views

How to install a custom Ubuntu Touch Kernel on the Nexus 10

I've just installed the latest version of Ubuntu Touch on my Nexus 10 tablet,but it does not fit my needs. Instead of it,I would like to install a minimal version of Ubuntu or Debian running with the ...
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19 views

Slow Internet connection

I have a D-Link DWL-G122 B1 wireless adapter with chipset RT2571, which corresponds to rt2500 driver in linux. However, because this specific driver is no longer available for my kernel version ...
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49 views

qemu kernel zImage file problem

im trying the install virtual embedded linux, i installed qemu and i installed kernel like as : $ wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.8.2.tar.bz2 in Kernel file enter these ...
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9 views

What prevents a user process from writing at random positions in memory and damage the OS or other processes?

Why can't the following code damage memory? int x; while(1) { x = rand();//assuming that the address space has the size of an int *x = 0; } I know that each process has a virtual address ...
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16 views

Int system call and 'int' within C syntax

I'm learning about kernels and I was curious if the int system call(in our case, in Linux) has any connection with the declaration of an integer in C and C-based languages. int n; Is an integer ...