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

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How to get support for the new 97 chipset under ubuntu 14.04?

I just bought a new motherboard Z97M Plus. The problem is the kernel in Elementary Freya does not fully support it. For example I have trouble setting up fan control. So my question is, is it ok to ...
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Ubuntu stopped booting

Ubuntu 15.04 has been installed. An update published May 21th was processed, which contains a new kernel. It stopped to boot with a message "Starting version 219." I have a Ubuntu bootable usb. ...
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Unable to find an initial ram disk that I know how to handle

After upgrading to the next linux image, aptitude has outputted the following lines: Setting up linux-image-3.16.0-38-generic (3.16.0-38.52~14.04.1) ... Running depmod. update-initramfs: deferring ...
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1answer
27 views

How to build Kernel version 4.0.4 using Git?

I should like to build a 4.0 kernel by cloning a repository as described in this web page which quotes the text : git clone git://kernel.ubuntu.com/ubuntu/ubuntu-.git I can't find an appropriate ...
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Upgraded a virtual guest system: /dev/disk/uuid… does not exit

I recently upgraded my Ubuntu 14.04 (kubuntu), running as a guest inside VirtualBox 4.3.12 hosted by Windows 7 Enterprise, 64 bit. All ran fine until yesterday - when I tried to start the new ...
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Why am I getting an error related to linux-image-3.13.0-53-generic (3.13.0-53.88)?

Every time I install or remove existing software I get the following error. isuru@isuru-Inspiron-3420:~$ sudo apt-get autoremove Reading package lists... Done Building dependency tree Reading ...
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20 views

How to install a specific driver from different kernel

My touch-pad driver is only supported in 4.0 kernel but running 4.0 kernel freezes my laptop is there a way I can install the driver of the touch-pad in my current kernel. My touch-pad is elantech. ...
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13 views

System freezing and preventing login

My system (Ubuntu 15.04) keeps having a problem where the machine is still up but I cannot login. At the GUI login, the spinner just spins and at the console I get: Username: dave Password: Welcome ...
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10 views

Live USB Kernel Panic error?

I tried to make a 14.04 live USB with Universal USB Installer. I get to the screen where it says Try Ubuntu, Install Ubuntu, etc. but no matter what I select, it eventually ends in this error; end ...
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20 views

How to use PCI ExpressCard(USB3.0)

I use Ubuntu14.04 64bit on laptop. now I need to use USB3.0 port. and I bought PCI ExpressCard(USB3.0) this is the express Card and I tried to connect it. it was recognized as follows. but,by lsusb, ...
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How to troubleshoot a video freeze

System information: Ubuntu 14.04.2 LTS Gnome 3.12.2 kernel 4.0.0-997-generic #201503310205 SMP Tue Mar 31 02:07:04 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux (this is an updated drm/intel-next kernel ...
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22 views

Access ubuntu terminal/sudo after pressing ctrl c and restaring while upgrading system

I tried to upgrade my system from 14.10 to 15.04 and while I was installing it asked me if I want to replace config file. I tried to compare, then didn't know how to exit Ipressed ctrl c and then I ...
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9 views

Suddenly no display signal during reboot test

I am running the reboot test by a simple script file calling init 6 to stress my system. But I found no VGA display signal while running reboot test in Ubuntu 12.04. By refer the kernel.log file as ...
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1answer
21 views

Automatic clearance of boot folder

Hello one of my familly members, who is not so concerned with computers and Ubuntu has an Ubuntu setup with only 200MB space for the boot partition. That makes sense if you only like to install a few ...
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15.04 WiFi&Wired fail w v2.19 kernels; work on 15.04 w v.2.16 kernel from 14.10. Toshiba NB15t-A

Neither WiFi nor Wired will connect on 15.04 w v2.19 kernels (or v. 3 from kernel.org) but work with 14.10's v.2.16 kernels on Toshiba Satellite NB15t-A. Title says it all. Neither will connect, ...
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1answer
21 views

Characters problem since kernel and graphic update

I have this annoying issue since yesterday when I updated my kernel and graphics. I have a Dell xps 13 2015 running ubuntu 14.04. It doesn't happen all the time, it can happen in any program, ...
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1answer
27 views

How to recover from a botched attempt to clean /boot, incomplete kernel/drivers

Ubuntu 14.0.4 generated an error trying to update. Turns out /boot partition was full. I ran a command to remove the old kernels, something like this: dpkg --get-selections|grep 'linux-image*'|awk ...
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My cpu slows down after a while and does not recover

Sometimes, and I can't reproduce it (but it happens often enough - a few times a week at least) my cpu slows down below its prescribed minimum. This is an example cpufreq-info output from a minute ...
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24 views

Do not know how to install grsecurity [on hold]

So I verified the grsecurity and kernel I did the first part from this http://en.wikibooks.org/wiki/Grsecurity/Configuring_and_Installing_grsecurity But now i have a folder linux-3.14.42 and i dont ...
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1answer
34 views

Operating System not found (Grub error)

Certainly after a reboot my pc I am getting following message in a grub welcome screen GNU GRUB version 2.02~beta2-9ubuntu1 Minimal BASH-like line editing is supported.For the first word, TAB lists ...
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43 views

I'm I being spied on?

so lets say am worried that I'm being spied on! So I regularly check on my log files. the kern.log reading is not making me feel calm at all... is like my camera is on and sending inputs somewhere I ...
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1answer
34 views

Updated kernel with dpkg but old kernel still in use

I needed to update my systems kernel to the latest available version, so I executed sudo apt-get install linux-headers-3.16.0-37-generic sudo apt-get remove linux-headers-3.13.0-37* Then I ...
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Installing Kernel in Android [closed]

Android is also based on linux kernel i.e. it's a fork of the linux kernel. If I want to install Multipath TCP kernel on my android phone, what steps do I need to follow, Can I install a linux kernel ...
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1answer
40 views

Installing New Kernel with apt

I am trying to install Multipath TCP kernel on my ubuntu machine following the documentation at this link. Step 1: Add the gpg-apt-key wget -q -O - http://multipath-tcp.org/mptcp.gpg.key | ...
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1answer
40 views

Why Can't GrUB Find a Kernel That It Already Found?

After upgrading to 15.04, I need to have kernel headers matching the running kernel (for another package). The upgrade installed kernel 3.19.0-17. Just in case, I also installed ...
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64 views

Kernel Headers for Ubuntu 15.04

Today I upgraded by 14.10 VM to 15.04. Since it's a virtual machine (via VirtualBox), I needed to install guest additions. However, the installation fails saying (in /var/log/vboxadd-install.log): ...
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1answer
27 views

Xubuntu 15.04 Gummiboot Kernel Panic

So I installed my new Xubuntu 15.04 in EFI mode. I installed gummiboot via sudo apt-get install gummiboot and activating sudo gummiboot install. On my HP Notebook I have to enter the efi file as ...
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1answer
955 views

Does Ubuntu automatically release memory allocated by a C program as the program terminates?

I have written a C program containing code allocating memory using the malloc() function. If I don't free up the memory using the free() function, will Ubuntu release it automatically?
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14.04 Wi-Fi is not working with Intel centrino 2200

I have a centrino 2200 Wi-Fi card http://www.intel.com/content/www/us/en/wireless-products/centrino-wireless-n-2200-desktop.html running Ubuntu 14.04 trusty. It connects to the network, but then I ...
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Help understanding or preventing this Kernel Panic?

Recently, I recieved a Kernel Panic while playing a game. I have not the slightest clue on how to even understand the panic, but I have provided few pictures that show it all. Other relevent info: ...
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39 views

Downgrade back to stock 3.16 kernel from 3.18.5 on Ubuntu 14.10

I upgraded the kernel to 3.18.5 for my Xbox One controller to use it, but I guess I failed because after I rebooted my laptop, it did a login loop after I logged in. Then I installed the kernel ...
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PCC ACPI Probe Failed on ubuntu after installing Debian [duplicate]

I just bought a new computer this week.So, I am new to this NVIDIA issues.I installed an Ubuntu 15.04 on my system and used an official driver which was downloaded from the nvidia website.I ...
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1answer
39 views

Unable to boot after installing new kernel

recently I installed the latest kernel 4.1.0-rc3 in my Ubuntu 14.04 LTS 64-bit.When I did reboot after make install, it is getting stuck after the grub listing the following error mentioning that it ...
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Can we get the exact number of Load and Store instructions [closed]

Can we get the exact number of Load and Store instructions when a program is executing,using any linux system calls or using any linux tools
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2answers
68 views

kernel version 3.13 even I have ubuntu 14.04.2

I am using 14.04.2 probably it was upgraded over 14.04.1 but my kernel version seems still 3.13. According to 14.04.2 it seems that 3.16. I did not understand why it was not upgraded ...
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X-Server won't start after kernel update on Dell Latitude E7440 with linux mint and docking station [on hold]

After udpating my Linux mint to a newer kernel (from 3.16.0.37 to 3.19.3) my X-server won't start. I tried doing dpkg-reconfigure xserver-xorg, deleting ~/.config/monitors.xml and sudo X -configure. ...
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91 views

Amd driver for ubuntu 15.04 not working

I have an A4-5000 apu with HD8330 amd graphics. on ubuntu 14.04 i had the propertary drivers but after installing 15.04 and switching to the propertary drivers it can not even open the catalys control ...
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1answer
18 views

How do I opt in to Early Preview of LTS enablement stack?

As explained in the wiki article LTS Enablement Stacks, The Ubuntu LTS enablement stacks provide newer kernel and X support for existing LTS releases. These can be installed manually, or are ...
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WiMAX in Ubuntu

About two weeks ago I asked a question about how to connect to WiMAX. And today I have done some research, and I want to share it with everyone. I don't know if this is going to be useful for someone, ...
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1answer
15 views

how to do a kernel bisection

I posted a bug on luanchpad a few days back (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1452166). I have been told to do a kernel bisection from 3.16 to 3.19. Can someone give me a simple ...
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1answer
408 views

How to Upgrade Linux Kernel 4.0.2?

I followed the steps for Updating the Kernel 4.0.2 from the source How To Install/Upgrade Linux Kernel and finally got this error. root@surfer:/home/algosig# sudo dpkg -i ...
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2answers
19 views

How to remove a newer kernel while booted with the older kernel?

I have two kernels installed on my system. 3.16... and 3.19.3...I'm running Ubuntu 14.10 and it came with the 3.16...kernel. I decided to try the latest possible kernel (3.19.3...), but I sometimes ...
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1answer
35 views

Anyway to get full bash working on Windows? [closed]

So I love the Linux CLI environment and I like to use bash for almost every task I can. For some reasons too long to explain, I'm leaving my Ubuntu 14.04 LTS to move to Windows 7. I have heard there ...
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how to use a different linux-image than the one is currently being used in ubuntu 14.02?

this are the linux-images I have and I am currently using 3.13.0-51 $ dpkg -l linux-image-\* | grep ^ii ii linux-image-3.13.0-51-generic 3.13.0-51.84 ...
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1answer
101 views

Ubuntu on DigitalOcean does not use the latest kernel

On a digialocean's VPS, I have some linux kernel installed. This is the result when I do sudo update-grub : Found linux image: /boot/vmlinuz-3.16.2-031602-generic Found initrd image: ...
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1answer
20 views

What does perf interupt mean?

I am working on my computer, trying to write some device code. I checked into dmesg to get some info, and saw this: perf interrupt took too long (2507 > 2500), lowering ...
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2answers
42 views

How to change kernel at boot [duplicate]

I installed the latest kernel (4.1) and want to boot into it instead of 3.9. How can i do this on ubuntu 15.04?
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35 views

wifi causing kernel panics

I've been having issues with my latest Ubuntu 15.04 installation. Whenever the wifi changes on it's own, or I change it through the drop-down selection, my kernel panics -- my computer is ...
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1answer
72 views

what are linux-image-extra and linux-image-generic? [duplicate]

Every time I use sudo apt-get upgrade, I get errors with the linux-image-extra and linux-image-generic. I am new to Ubuntu so I would like to know if these "image" files are the same as in Windows? ...
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2answers
136 views

How to upgrade to the latest kernel [duplicate]

I'm looking at the official repo, https://github.com/torvalds/linux - how would I replace the ubuntu 15.04 kernel (3.x) with the latest, 4.x one? My current system has the x86_64 architecture.