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

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missing kernel header

I am trying to compile this /* Kernel Programming */ define MODULE define LINUX define KERNEL include /* Needed by all modules */ include /* Needed for KERN_ALERT */ int init_module(void) { ...
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Ubuntu Kernel Update 3.13.0-43 causes graphics problems and Kernel Panic

So when I did an update through the terminal to kernel 3.13.0-43, and I rebooted my system - it booted but it only had one resolution, 1024x768, when that's not even my largest resolution (my largest ...
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35 views

AMD Omega drivers don't work with kernel 3.17.6 on Trusty?

I just installed new fglrx drivers on Ubuntu 14.04. New AMD drivers are distribution-specific, so downloaded them. Since it says they re compatible with kernel up to 3.17 version on release notes, ...
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1answer
16 views

Where is kernel/user.c?

I am doing some changes on ubuntu linux source code. I used find / -name user.c command to locate user.c but failed. Where is it? My working environment is ubuntu14.04.
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2answers
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How to apply an “undocumented” kernel patch

I am unable to use the touchpad on my new GigaByte P35 v2. I seem to have the problem documented here (elantech touchpad not detected on gigabyte laptop), and here ...
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1answer
37 views

Ubuntu 12.04 no wlan0 interface

I installed Ubuntu 12.04 on an Acer e5-571-31KM. Dmesg and lspci output indicate a wireless Network adapter was found, but according to ifconfig there is no wlan0 interface. Unfortunately I have no ...
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2answers
71 views

Why doesn't apt-get autoremove remove my old kernels?

My boot partition is on a SSD, so it doesn't have room for more than about 8 installed kernel versions, and eventually some kernel update will fail to install because my boot partition is full of old ...
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1answer
34 views

Problem with dpkg -p

I'm trying to have informations about kernels installed with dpkg -s but the return is weird (and in french), but not seems to work: $ dpkg -p linux-image-3.16.0-28-generic dpkg-query: le paquet « ...
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1answer
20 views

Latest kernel update (.43) crashes my pae system

I have been happily running a 14.04 system but the latest kernel update has frozen my system. The background; I have been using the 32 bit ubuntu distribution (I have no idea why) and booting with the ...
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1answer
32 views

Cups job stuck at: processing since …“Waiting for printer to become available.”

When I reboot, a queued print job will get printed, after that jobs don't print with the following message: processing since "Waiting for printer to become available." Also, when I run the vanilla ...
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28 views

uvd not responding… cant start ubuntu

I am new to ubuntu. When I installed (stand alone) ubuntu 14.04.1 on my laptop, it wont load and it shows error that uvd not responding a few times and then shows uvd not initialized and hangs I tried ...
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40 views

Ubuntu 14.10 touchscreen not recognized anymore on XPS 15 9530 Haswell

I've a Dell XPS 15 with Ubuntu 14.10 and I've just realized that my touchscreen does not work anymore. It's not even recognized: $ dmesg |grep -i touch [ 3.179897] psmouse serio1: synaptics: ...
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26 views

Dependencies issues linux-image-3.13.0-43-generic

Was setting up Postfix but didn't get too far, because Ubuntu returned an dependencies error. Tried to fix this but I cant find the cause to the problem. dpkg: dependency problems prevent ...
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19 views

free space in boot for upgrade to 14.04

Can not upgrade to 14.04. Not enough free space in /boot again. No obsolete kernels detectable. What gives? :~$ ls /boot/ abi-3.11.0-13-generic initrd.img-3.11.0-26-generic ...
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2answers
34 views

How to uninstall kernel modules?

I m doing my project in ubuntu on kernel version 3.10.48. But due to compatible problems, we had to change the version (recompile the kernel) to 3.17.6. Now, as I had assigned 50 GB to ubuntu only 9 ...
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0answers
9 views

Write udev rules for serial device

I have one concern regarding device name assign by kernel like /dev/sda* , /dev/sdb* ... etc but i would like to write rules for assign name to new pattern like "/dev/sc**"(starting with modified ...
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10 views

how to avoid loosing kernel changes throgh updates?

I'v modified kernel to enable SPIDEV on Pandaboard Ubuntu. Unfortunately I am loosing this devices every kernel update. Is there any posibility to avoid it, so I do not need another day to compile the ...
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20 views

Configure webcam

I see a garbled image when using my web cam using Cheese or Skype using uvcvideo kernel module. I am aware that this is a known bug, but does it have a solution yet? Links: Kernel modules with ...
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21 views

Periodic lockups showing kernel: [154858.820009] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed… render ring idle

System is Ubuntu 14.04.1 LTS with kernel 3.13.0-43-generic, I have noticed the lockups periodically since 09/13/2014. I can't remember what kernel version was in use then possibly kernel ...
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45 views

Lost audio after updating kernel from 3.13.0-40 to 3.13.0-43 [closed]

I updated the kernel image on 2014-12-12 from version 3.13.0-40-generic to 3.13.0-43-generic and as a result I lost my laptop's audio. I am running Kubuntu 14.04 LTS on a Lenovo Thinkpad T540p laptop. ...
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2answers
61 views

I think I accidentally removed the current linux kernel when trying to free up space in /boot

Sorry for being a bit long-winded, but I am not sure what has happened so I'll try to state what has happened as completely as possible. I am currently logged in to the system and it's running. It is ...
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18 views

Can't install any app [duplicate]

I am facing problem installing / updating any app on my system. I did some Google and came to know /boot is 99% full. I tried increasing it but everything failed because everything gets stuck at gzip: ...
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7 views

linux modules do not autload after updating

I did apt-get update and since that moment, something in config files probably changed, however since that moment modules in my kernel (kernel wasn't updated) do not autoload. I have to manually load ...
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29 views

Deleting Old Kernels But Saying I Dont Have Correct Permissions [duplicate]

Okay So I Have Tried To Download Synaptic And Allll The Other Thing This Forum Tells You To Do And Nothing Is Working, I Am Trying To Install The Recent Update For Ubuntu 14.04 But For Some Reason ...
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50 views

Default Grub2 entry doesn't point lastest kernel version + “selinuxfs mount failed” boot error: how to repair?

I installed Ubuntu 14.04 in multi-boot with linux (Mandriva 2011/Grub Legacy). First it seemed to work. But on my first update in Ubuntu, I was "strongly adviced" by the system to update grub and got ...
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3answers
616 views

Boot hangs after upgrade to kernel 3.13.0-43

I just upgraded from 3.13.0-40 to 3.13.0-43, and now I can't boot- my system hangs at the ubuntu splash screen with the five orange dots. My fans are all running full-tilt, and the system is ...
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275 views

Ubuntu 14.04 kernel update from 3.13.0-40 to 3.13.0-43 caused my laptop to hang

Ubuntu 14.04, just updated from kernel 3.13.0-40-generic to 3.13.0-43-generic and now I can not boot my laptop. It seemed that the new kernel came with some Navidia drivers that caused this problem. ...
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21 views

How to upgrade/ remove recompiled kernel version in Ubuntu 14.04?

I m working on process migration and for adding extra utilities, I recompiled my previous kernel version 3.13.0-24 generic to 3.10.48. Now I want to install Checkpoint/Restart tools (CRIU) which are ...
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2answers
28 views

Unable to upload files with any browser on Ubuntu 14.04, why?

please, I need your help. I have a weird problem. I am unable to upload files to gmail, gdrive, facebook nor other website with Ubuntu 14.04 I am able to ping google, watch youtube videos and ...
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1answer
40 views

Problem with VMware Workstation 8.06

I am a new Linux user, and I'm currently using the latest version of Lubuntu. I want to create a virtual machine with VMware because in VirtualBox I am not able to use DirectX in Windows XP. Even ...
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25 views

.conf in /etc/modprobe.d does not work [14.10]

I have that horrible buzzing sound in my left headphone (it's the same in windows, I think it's a hardware defect) so I want the sound chipset to automatically power off to get rid of that buzz sound ...
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24 views

Terminal command to send an interrupt to mimic a new peripheral device connection?

Is there a way to send an interrupt indicating a connection of a new peripheral device? Being precise I want a standard user command that could perhaps mimic ps/2 mouse connection. My mouse keeps ...
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1answer
27 views

Change kernel config without compiling

Is it possible to change the kernel configuration of the running kernel without compiling it myself? In debian-based systems, there's the config file of the current kernel in /boot, e.g. ...
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2answers
70 views

Upgrading Linux Kernel 3.11 to 3.13 for Ubuntu 14.04 [duplicate]

When I upgraded to Ubuntu 14.04, apparently my kernel was supposed to upgrade from 3.11 to 3.13. Unfortunately, the kernel upgrade did not complete. As a result, I have several files for 3.13, but am ...
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2answers
85 views

kernel is outdated

I have troubles with updating my kernel. I'm running Kubuntu 14.04. uname -r output: 3.13.0-32-generic I clearly see newer versions in repos with sudo dpkg --list 'linux-image*': ... ...
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21 views

Which part of the kernel powers on/off USB ports? How - the internals?

Please refer to this post: Power on/off USB ports . It is one thing to blindly replicate the codes in a terminal and get the desired results. I wish to know which part of the kernel does this work, ...
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2answers
37 views

Looking for a driver for a tablet, I heard that I “need a kernel”- what does that mean? [closed]

I'm new to everything and I've heard a lot about tablet drivers that work with a kernel. However, I don't know what a kernel is and how to use/download it. I've seen a lot of codes with the drivers ...
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1answer
35 views

Accidentaly deleted initrd and vmlinuz

Yesterday I suddenly deleted initrd and vmlinuz files in boot folder. Now I can't get in my Debian system, because GRUB can't find vmlinuz and initrd. I tried to generate new initrd image but I can't ...
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27 views

Header file for struct proc_dir_entry

I'm writing a firewall for the Linux kernel and I'm using the proc_dir_entry data structure (which I've found in the tutorial I'm currently reading). My firewall is conceived as a kernel module but ...
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0answers
46 views

Ubuntu 14.04 : Core 2 Duo : System wont boot when Multi Core processing is enabled

I belive you guys are having good time. Well i am not!! I got an annoying problem with my Laptop(Thoshiba L310). She wont boot if Multi Core processing is enabled. On booting, just before i enter the ...
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1answer
18 views

problem new with ubuntu and i cannot install

I have neu cd ubuntu 12.04. With installation was everything ok and after restart i have error unable to monut root vfs kernel panic and cannot open root file. I tried to install this again but not ...
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1answer
30 views

After changing kernel , kernel crash is not working

I have changed the kernel in Ubuntu 12.04. After this, if I gave a kernel crash the memory configurations are getting changed and dump file is not created.. It is getting changed from 4GB to 109MB. ...
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1answer
36 views

Ubuntu General Instability / crash triggers Windows 8.1 startup repair

Let me begin with my usual statement that I only ask questions on StackExchange sites when I can't find anything on Google, and that my question-asking skills are rusty, so forgive me blah blah ...
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1answer
113 views

How do I install driver for Radeon Mobility HD 3650?

I was trying to install driver for my graphics card, I'm using Ubuntu 14.10 and when I install driver from support.amd.com log file says that i don't have kernel headers (version.h file) in ...
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1answer
25 views

does every program have to go through the shell to complete the process they willing to make?

i have seen somewhere that "bash is used to communicate with the Linux kernel" is it take effect only to the terminal? or every program (including programs which has GUIs) have to go through the ...
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47 views

Hard Disk SMART Attributes FAILING

I have a dual booted lenovo ideapad z510 computer - windows 8 and ubuntu 14.04 (mainly used). Since a few days, while I go into ubuntu, errors of not able to read from hard disk , kernel panic , etc ...
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2answers
98 views

Dual boot system fails to boot at all! Help

I have a persistent problem of recovering my hard drive. I had Ubuntu and Win 7 installed on my DELL xps m1530 (Core Duo 2). After manipulating my partitions in windows, I got stuck in grub rescue. I ...
4
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1answer
293 views

What is a -ckt mainline kernel?

I just saw v3.16.7-ckt1-utopic on http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D and found a related anouncement promising information about -ckt kernels in the ExtendedStable kernel article ...
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30 views

Use new 3.16 kernel alsa firewire with qjackctl

I just upgraded Ubuntu studio to 14.10 with 3.16 kernel on a 2008 MacBook because it should support a lot of new firewire audio devices natively in alsa. I plugged in my Behringer ufx1204 with its ...
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1answer
30 views

Which compiler i have to use to understand C behaviour exact behaviour

I am confused regarding with the c compilers. as per my knowledge for a programmer the code is not important but the internal behaviour is very important.cause if we know how the compiler behaves for ...