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

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Installed kernel, and printer driver - No Unity?

I ran installation of printer drives for Epson Stylus S22 (From original website) The most recent installs are: 2013-04-10 12:06:53 install linux-image-3.5.0-27-generic:amd64 <none> ...
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433 views

How to enable switching Hybrid Intel/ATi with mux on Ubuntu 12.04?

I have notebook with hybrid intel/ati HD5650 graphic (with mux). I want to install previous kernel 2.6.35 like on ubuntu 10.10 because on that kernel a can switch my graphic without any problem with ...
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375 views

Tried to install a Kernel, now i have mutliple problems!

I tried to upgrade the kernal to 3.8.2 but it didn't work. So after learning that 3.8 wouldn't work with bumblebee I tried to go back and install 3.5.25. It still didn't work. uname -r says: ...
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272 views

high interrupts

I have high Rescheduling interrupts and Local interrupts. while doing nothing my total CPU wakeups reach 275-400. While watching movies it reaches up 900-1000. And while browsing the Internet it ...
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107 views

Where do I get linux-headers-3.0.0 for 12.04

I'm pretty new to Ubuntu, so question may seem stupid. I have a module which used to work on my parents laptop. After several updates module no longer works, and I'm pretty sure, old kernel would ...
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299 views

Unable to install Ubuntu - Kernel panic

I was installing Ubuntu 12.10 but my computer shut down and every time I tried to install, showing the following:
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225 views

What priority to use calling sched_setscheduler

I am writing a server that I do not want preempted by any other user process or "low priority" kernel process. I'm using code like this: struct sched_param sched_param; memset(&sched_param, 0, ...
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51 views

Linux kernel: page substitution policy

I am supposed to answer for homework which algorithm is implemented in Linux for the virtual memory page substitution and also give some extracts of the code to prove that. After some research I have ...
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308 views

Problems with booting Linux after updating kernel

After updating linux headers from 3.5.0-19 into 3.5.0-20 i faced booting problem. I don't know reason, sometimes boots normally, but sometimes i need to reboot 3-4 times. I tried to boot with recovery ...
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1k views

WiFi can't connect after suspend

I've had this problem since Ubuntu 11.10 (my first install) but I was able to get around this issue with this answer. After I installed Ubuntu 12.04.1 I tried to use the same fix as before but I ...
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10 views

What might cause “version 'KERNEL_VERSION' has bad syntax: version number does not start with digit” during update-initramfs -u

When I run sudo update-initramfs -u I get the error output dpkg: warning: version 'KERNEL_VERSION' has bad syntax: version number does not start with digit update-initramfs: Generating ...
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10 views

busybox error while start up

busy box error, due which couldn't able to start up my system.. please help me out to slove this. I tried both advanced and normal mode, but couldn't resolve the problem...busybox v1.22.1 is showing ...
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15 views

Need advice about Linux I/O user space API

I work with the SCST SCSI target subsystem now, and I was asked to compare this subsystem (which is not a part of the kernel) with kernel SCSI subsystem LIO (mostly performance). So, I'm going to ...
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7 views

Ubuntu 14.10 server locked after cleaning /boot

My Ubuntu 14.10 server locked after cleaning /boot. It has been working without any problems for several months, but yesterday I received an error message saying that there was no space on /boot. I ...
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15 views

Absent frontend0 with USB DVBSky S960/S860 - driver bug?

I was pleased to upgrade, today, to Ubuntu 15.04 and to get a 3.19 kernel because the Linux TV Wiki suggests that, from kernel version 3.18 onwards, my "Mystique SaTiX-S2 Sky V2 USB (DVBSKY S960 ...
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44 views

System problem and should I uninstall Vivid kernel 4.0 from Trusty?

Last night, I suspended Ubuntu. This morning when I tried to wake it up by lifting my laptop top, it failed as the "sleep" led indicator changes from on to off and the "Power on" led indicator tilted ...
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15 views

Why doesn't my nvidia driver module get aliased to just 'nvidia'

I have nvidia-346, nvidia-346-dev and nvidia-346-uvm installed (on my Kubuntu 14.04). For some reason, the modprobe.d file this installation create does not alias 'nvidia-346' as just 'nvidia'. Why? ...
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34 views

Ubuntu Crashed & can't reinstall from USB

When I tried to log in to Ubuntu 14.04 after it was in sleep mode, the cursor freezed so I restarted using the command: sudo reboot But whenever I try to log in again, I get a Black screen. I ...
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15 views

How to change the Delayed Acknowledgement timer? (14.04)

I am trying to set different values for the timer of the Delayed Acknowledgement and see the different behaviors at packet level. I expected this to be a kernel level option but I can't locate ...
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33 views

Will I get update on both kernel and application, on my Ubuntu 14.04 with kernel 4.0?

I installed 64bit generic kernel 4.0 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0-vivid/, on Trusty (i.e. Ubuntu 14.04), following ...
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22 views

kernel mismatch after upgrading from 12.04 to 14.04?

I just upgraded my 12.04 to 14.04. After that I wanted to install the kernel headers (required to run vmware client). $ sudo apt-get install linux-headers-generic The command eventually fails: $ ...
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28 views

Kernel error when trying to install Ubuntu alongside Windows 8.1

Why does this kernel error appear when I'm trying to install Ubuntu alongside Windows 8.1? And what can I do about it? Kernel Offset: 0x0 from 0xffffffff81000000 relocation range....... --[ end ...
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10 views

U-Boot switch kernel on OMAP device

I build my own kernel for armel architecture, successfully installed it on my device, can see it in kernels list: dpkg --list | grep linux-image ii linux-image-2.6.33-500-omap ...
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8 views

How to disable graphics card

Is it possible to disable one of my two graphics card as a grub parameter? And is it possible to disable both graphics cards?
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51 views

How can I tell if my Ubuntu kernel leap second bug free?

I have few Ubuntu boxes Linux SERV01 2.6.32-38-server #83-Ubuntu SMP Wed Jan 4 11:26:59 UTC 2012 x86_64 GNU/Linux How can I check if the installed kernel is leap second bug free ? Don't have ...
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21 views

Need Ubuntu with real-time extensions and GLIBC >= v2.15

I have Debian Wheezy with an RTAI kernel but it has EGLIBC 2.13 and I need 2.15 or higher. I've tried compiling a kernel with PREEMPT-RT on Ubuntu 14.04 and latency is horrendous, so something didn't ...
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19 views

Not able to configure bluetooth wireless earphones w/3.11.0-12-generic kernel

Greeting Linux Debug Demigods, Just confiscated a really slick pair of Bluetooth wireless earplugs. I finally realized my machine does not include Bluetooth hardware, and so tracked down, and plugged ...
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29 views

Removing Utopic HWE-Stack and downgrading X.org and Kernel to use external projector on ThinkPad T450 running Ubuntu 14.04.2

As indicated in the previously asked question: 14.04 Thinkpad T450: Text getting messed up on large screens I am also experiencing this problem (garbled text and missing letters) when using an ...
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18 views

Ubuntu Touch AppArmor Kernel Patches

new to Ubuntu development: I am porting Ubuntu touch to my own device. There are many different commits related to AppArmor on ...
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48 views

Unable to upgrade kernel on Ubuntu 14.10

I'm trying to upgrade my kernel from the current one (3.13.0-36-generic) to 3.18.5, but my system doesn't get updated after rebooting. I have tried with other kernel versions, but none seems to work ...
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35 views

Ubuntu Server 14.04.2 LTS restarts continuously

is my first time asking here, so, congrats for the forum, is very instructive! I have an Ubuntu Server 14.04.2 LTS (64bits), and when Im working with that, I don't know exactly why, it restart again ...
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16 views

Verbose messages at system start

In 14.04 after adding VERBOSE_INIT=YES to linux line in Grub it was possible to enable verbose messages at system boot. In 14.10 this trick doesn't work any more. Removing quiet argument from linux ...
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13 views

Strange error while loading a compiled module.

I want to have read/write support for UFS filesystem on my ubuntu 14.04. To do that, I downloaded the latest sources for ubuntu kernel using the command :- apt-get source linux-image-$(uname -r) ...
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26 views

Catastrophic GUI breakdown and feezing

I'm experiencing catastrophic GUI breakdowns and freezing with my Ubuntu machine. It also randomly freezes but the time it takes from booting to freezing is different everytime. Observation so far ...
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30 views

USB 3.0 READ Speeds enabled with “libccid” but WRITE Speeds still slow; “SuperSpeed” recognized

Fresh install of Ubuntu 14.04.1 LTS (updates bring it up to 14.04.2 LTS) USB 3.0 flash drive (Corsair 64 GB Survivor Stealth and Silicon Power 64G M70); both show slowness prior to loading ...
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24 views

how to apply new kernel configuration created by make menuconfig

I am compiling Raspberry PI kernel and i am asking here because i think it is almost same or similar. while following this step, i want to change some configuration of kernel. So i used make ...
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47 views

3.19.3 kernel driver for 174f:14b2 (syntek)

I am not able to find driver for my integrated webcam - please advise if anyone faced similar issue and was able to resolve it. Details: lsusb sees the device as 174f:14b2 Syntek PS.: stkwebcam ...
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18 views

Kernel on Ubuntu Partition has stopped working

I was writing some software on my ubuntu partition, and suddenly I couldn't open any new apps. I turned my laptop off and on, and I could boot to my ubuntu partition from grub, but then I got a weird ...
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68 views

No wireless on Asus N56VJ, AR9485 Wireless Network Adapter

I've been having a problem with my wireless connection since yesterday: I can't connect to some of my wifi networks -my password doesn't seem to work-, and when I do, the connection is slow, keeps ...
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43 views

Applying recent kernel change to older (14.04 LTS) kernel

I believe there is a kernel fix for 2015 lenovo touchpad buttons not working in linux. It was just created (3/15) on the mainline kernel. This issue (see last post): issue report Pointing to this ...
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70 views

Ubuntu 12.04 Kernel 3.19 or later

I have a Dell E7440 Ultrabook with an eDock Port Replicator. That dock is somewhat special in the way it handles the DVI and Displayport Connectors. Kernel Support is available from 3.19. On this ...
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25 views

Error compiling kernel

I am trying to compile the kernel for the pcDuino3 using this tutorial. The only problem I am experiencing is when running make. Make just exits with the an error like: make[1]: *** [sub-make] Error ...
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11 views

Add module to linux kernel

i'm working in project with python and mysql database .my question is how add this python script to the linux kernel so that i put it in raspberry Pi+. I can do this or not!!!
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55 views

Kernel Panic running Ubuntu 14.10 bare-metal on IBM Power 8 (8247-22L) with level 3.16.0-31

After installing Ubuntu 14.10 on an IBM Power 8 LE system (8247-22L) with bare-metal image (kernel 3.16.0-23) an apt-get dist-upgrade command upgrades the kernel to 3.16.0.31. A reboot with this ...
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26 views

Is there a way i can download specific version (Build of Ubuntu ) ubuntu server?

Is there a way i can download specific version (Build of Ubuntu ) ubuntu server? I need to download the ISO directly so that when installed i get following root@:~# cat /etc/lsb-release ...
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26 views

Booting flash drive on multiple PCs

I installed Ubuntu GNOME on a 120GB USB 3.0 SSD with the intention of making a portable Linux install (not live) I could boot off of any system. I'm getting kernel panic due to UUID being incorrect ...
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33 views

CODE INVOLVING GPY in python

The code I am trying to run is given below here. It is not executing beyond line 114 ie. print k. After, that the printing of the model is not taking place and the errors being returned have been ...
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43 views

Issues building driver for my x120e on Ubuntu

After downloading the Realtek Linux mac80211 based driver: from Realtek Driver Downloads, I'm encountering the following error; after changing to the "appropriate" directory and executing sudo make: ...
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37 views

grub rescue in dual booting (with ubuntu 12.04) and kernel panic error

Can anyone please help me out in solving the grub rescue problem that I'm facing on my Lenovo G570 laptop (installed operating systems are - windows 7 home basic and ubuntu 12.04 LTS)? The initial ...
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13 views

Android Kernel zImage is not creating

Everything goes fine till kernel configuration of android kernel source . But when it comes to compilation of kernel that also goes pretty good make -j4 ARCH=arm...... But at last it does not show ...