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

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3 views

Xenomai: binding failed: Cannot allocate memory

I installed and configurated xenomai using this guide. There are some examples under xenomai2.6/examples/rtdm/driver-api. To add rtdm module to kernel, I added my gid using below command echo "1000" ...
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1answer
11 views

Browse Ubuntu source code directory

I have Installed Ubuntu 12.04 On Virtual Box. How to browse the source code directory? What is the commands on terminal to do this?
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1answer
13 views

Problem loading ubuntu

I bought a used laptop with the hard drive wiped clean. Tried to load 14.04 got a message that kernel has to be loaded first. Reloaded xp and tried again, same thing?
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1answer
9 views

Edubuntu inappropriate Kernel for installation

I faced this error while Runnign Edubuntu from Virtual Box. I used this edubuntu-13.04-dvd-i386.iso file.
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1answer
36 views

Why do most of my drivers not load after updating kernel to 3.13.0-36?

I recently upgraded my system with a new motherboard, and reinstalled Trusty to have an AMD64 system (old motherboard was 32-bit). Reinstallation (side-by-side), with 14.04.01 LTS went fine and new ...
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1answer
24 views

How do I remove old kernel files from /boot and fix a potential error listed in <sudo dpkg --list 'linux-image*'>?

Any help with the following would be very much appreciated: A few days ago I installed the latest stable Linux kernel (3.16.3) and then I used the one liner from here to remove my old kernels. The ...
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0answers
17 views

How to convert .iso file to .img file ? [duplicate]

I am making a simple kernel and to try it on bochs emulator , I need to convert the iso of the kernel to img file. I think, it can be done using the dd utility, but I don't know how to do it using the ...
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2answers
808 views

Error during system update

I'm here to ask help because since each time I do a system update I get errors on the terminal and it is impossible for me to update the kernel to more recent versions. Here I post the output of the ...
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2answers
6k views

Can't remove kernels “run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 1”

Yesterday I upgraded Ubuntu from 12.04 to 12.10. However, the linux kernel has not upgraded from 3.2 to 3.5 as I would have expected. $ uname -r 3.2.0-32-generic $ uname -a Linux tony-b ...
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0answers
9 views

Hang in 14.04 when mounting NTFS Drobo via Firewire

I was trying today to upgrade my file/media server to 14.04, which has a Drobo attached via Firewire (lspci identifies the controller as TI TSB82AA2). The new kernel sees the controller and Drobo ...
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1answer
11 views

Kernel Panic, Can I get specific info from this screenshot I have?

here are the specs for my desktop: Linux Ubuntu 14.04.1 LTS & Windows 7 HP pavilion p6000, AMD64 Here´s the problem details: Kernel panic error (Ubuntu) and Blue Screen of Death (Windows) ...
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8 views

LIS 3.5 under Ubuntu 12.04 LTS

Unfortunately I needed to run an Ubuntu Server 12.04 LTS under a Hyper-V from MS. After install, I pass through big problems with network and i/o performance. The Hyper-V recommend to update the LIS ...
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2answers
3k views

What's the point of having /vmlinuz and /initrd.img?

Ubuntu keeps a symbol links for current vmlinuz and initrd.img, at /, but what's the point of doing so? And given that many people have their /boot on a different partition.
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0answers
36 views

How to install VirtualBox in Ubuntu 12.04 LTS: “No suitable module for running kernel found”

I have a fresh 12.04 LTS installation. I have installed linux-headers-generic as well as build-essential. When I install virtualbox, I get the following error: Building initial module for ...
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5answers
12k views

How to install “perf” monitoring tool?

Could someone help me to install perf monitoring tool, please?
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0answers
14 views

kernel make zImage error - No rule to make target vmlinux

I've been searching for a couple of days and I can't find anything on google about an interesting error I get when compiling a linux kernel. I initially thought this problem had something to do with ...
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0answers
8 views

creating a copy of a process in linux kernel

I'm trying to create a copy of a task_struct in the same kernel where the copy's original task_struct is. The copy should have a different PID and the state should be same as the original ...
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2answers
36 views

Kernel module needs to be reloaded after boot

I just got my ALPS Touchpad on my Lenovo Flex 2 working (xinput returned "PS/2 Generic Mouse", now it returns two devices: "ALPS PS/2 Device" and "ALPS PS/2 Device") But after rebooting my system it ...
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0answers
12 views

How to cause a test crash with kdump?

After installing linux-crashdump and kdump-tools according to https://wiki.ubuntu.com/Kernel/CrashdumpRecipe and configuring the latter so that cat /sys/kernel/kexec_crash_loaded prints 1, I'm having ...
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2answers
3k views

Why do I get disk I/O errors booting the 3.2 kernel on a xen vps server?

I have a xen vps, which I just upgraded to the new LTS 12 Precise Pangolin. However, I see this error on booting: [ 12.848076] end_request: I/O error, dev xvda, sector 12841 [ 12.848093] ...
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0answers
29 views

Screen flicker Ubuntu LTS 14.04 since kernel 3.13.0-35 [on hold]

Toshiba laptop A215-S4757 substantial and erratic flickering. I doubt it's very good for the display power supply, let alone epileptics. So far, the only suggested cure that works is locking in GRUB ...
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0answers
16 views

No internet connection after compiling and installing realtime kernel on ubuntu studio 12.04.5. [on hold]

I have compiled linux kernel 3.2 realtime and installed it on ubuntu studio. Everything seems to work (even proprietary fglrx driver) but i do not have internet access. How can i solve this?
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0answers
13 views

Xenomai: /dev/rtheap is missing

I want to use `xenomai . I try to install on my pc. I read this page and did these steps: http://www.stanley.gatech.edu/skelly/uncategorized/installing-xenomai-on-ubuntu-12-04/#comment-3379 But I ...
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1answer
11 views

How to know where in /dev/ is a USB keyboard loaded?

To be precise, when you plug in a USB storage device, it is loaded in sd something, but where is a usb keyboard loaded in /dev/?
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1answer
3k views

How can I revert to the previous kernel version w/out dependency issues?

Since ubuntu updated my install to 3.2.0-37-generic, my laptop fan constantly runs. I never had this issue with the previous kernel versions. To fix this problem, I would like to revert back to the ...
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3answers
20k views

What is the safest way to clean up /boot partition?

I've got 200 MB assigned for the /boot partition. Everytime I try to update the kernel I get an error message that basically says the size of /boot is full. What can I do to cleanup /boot and ...
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1answer
40 views

newest kernel not loading

I got problem (maybe after automatic update - not sure) with loading ubuntu (14.04 lts) - it is now showing weird graphic during booting - something like this LINK and then black screen insted of ...
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2answers
352 views

Kernal panic on fresh 14.04 install on Barebone Brix Pro i5-4570R

I recently upgraded from the smaller AMD barebone brix to the brix pro. The new PC seems to make Ubuntu 14.04 crash on boot, a bug which I can't see anyone with the same PC having (too early?). I've ...
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0answers
32 views

Removed the wrong kernel

I was updating my Kernel today (or at least trying to) from (I think) 3.13 to 3.17-rc6 and while I was doing it I installed the low-latency kernels by mistake. I then removed some unwanted kernels (I ...
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1answer
247 views

Ubuntu 14.04 realtime kernels = 3.13

I use OpenGL 4.4 drivers with ATI drivers (only for kernel 3.13) System Requirements for opengl 4.4: Xorg/Xserver 7.4 and above (up to 1.15) Linux kernel 2.6 or above (up to 3.13) glibc ...
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1answer
50 views

What happens after the core selects mass-storage

When a usb mass-storage device is attached to the host, enumeration of the device happens and the process where an address is given to the device, getting the descriptors occurs, then the core checks ...
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1answer
37 views

How to reinstall kernels after accidental deletion with a separate boot partition and an encrypted LVM volume?

My installation is a Ubuntu 12.04 64 bits (Classic "legacy" MBR - No EFI/UEFI here) with two partition : A separate boot partition An encrypted LUKS volume that contains the system Logical Volumes ...
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3answers
4k views

Ubuntu 13.10, kernel 3.11 blank screen issue with hybrid graphics

On my HP Envy, which has both an Intel on-chip graphics card and an Nvidia Geforce: *-display UNCLAIMED description: 3D controller product: GK208M [GeForce GT 740M] vendor: NVIDIA ...
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1answer
46 views

Black screen and call stack trace showing after kernel update

I ran an update today which included kernel updates. I left the screen for a while and when I came back all I see now is a black screen with white text containing call stack trace information ...
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2answers
269 views

What do I need to write device drivers on Ubuntu?

What do I need to write device drivers on Ubuntu? Do I need source code for Linux? What else is needed?
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0answers
48 views

DVB adapter under kernel 3.13.0-35 and above

I have a Ubuntu 14.04.1 server with a MythTV backend server and a Digital Devices DVB adapter. The server has been working fine, but if I upgrade the kernel from 3.13.0-34 to 3.13.0-35/3.13.0-36 my ...
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0answers
21 views

VMWare 8 will not work after upgrade to 14.04

When I try to execute VMWare i receive the message: -VMware Kernel Module Updater --Before you can run VMware, several modules must be compuled and loaded into the running kernel. ---Kernel Headers ...
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1answer
211 views

Ubuntu 14.04 kernel upgrades not changing default

So i have 3.13.0-34 & 3.13.0-33 & 3.13.0-24 all installed but the system constantly sticks with 3.13.0-24. update-grub does not seem to change this. grub configuration says boot entry 0. I'm ...
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3answers
1k views

apt-get does not find suggested package (perf tool)

I am using performance counters (https://perf.wiki.kernel.org/index.php/Main_Page) on Ubuntu 13.10 x86_64. If I type perf I get: perf not found for kernel 3.11.0-031100 You may need to install ...
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0answers
91 views

ubuntu doesn't boot with initrd.img-3.13.0-35-generic and initrd.img-3.13.0-36-generic

I'm not able to boot with initrd.img-3.13.0-35-generic and initrd.img-3.13.0-35-generic - just drops into a busybox shell with the regular generic message. I though that was something kernel related ...
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1answer
86 views

Acer Aspire wifi on Broadcom b43 not working [duplicate]

ck, including userspace. [ 79.694480] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel [ 79.694486] [drm] drm/i915 developers can then reassign to the right ...
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4answers
8k views

How do I update my nvidia modules after updating my kernel?

Every time there's a kernel update, nvidia graphics drivers stops working because there's not a valid kernel module. What is the ubuntu way to 'recompile' the nvidia module for the new kernel? ...
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0answers
10 views

Unable to find my desktop after I boot with a lower kernel

Where is my desktop? My os is Ubuntu12.04.3 3.8.0-29-generic. I reboot the kernel with 3.2.0-23-generic.By sudo gedit /etc/default/grub change GRUB_DEFAULT=saved GRUB_TIMEOUT=2 ...
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0answers
27 views

Unable to install GCDemu in Trusty Tahr

After trying to install gcdemu from ppa I always get this error and im unable to install it I get this error (synaptic:6595): GLib-CRITICAL **: g_child_watch_add_full: assertion 'pid > 0' failed ...
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0answers
56 views

How to disable Lazy Preempt in kernel

I'm relatively new to Linux and working on getting a real-time kernel up and running for robot applications. I'm on Ubuntu 14.04, using kernel 3.14.3 and the 3.14.3-rt5 real-time patch. Also using ...
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3answers
24k views

How do I clean or disable the memory cache?

After the system starts, in a few minutes my memory cache fills up and it starts using the swap. Here's a screenshot of /proc/meminfo. However, if I can disable this process / clean the cache once ...
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4answers
903 views

apt-get install was interrupted

I am new to Ubuntu. I got the following lines after an interrupted apt-get install. Running depmod. update-initramfs: deferring update (hook will be called later) Examining /etc/kernel/postinst.d. ...
63
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5answers
31k views

Why is swap being used even though I have plenty of free RAM?

I thought the whole essence of swap was to act as a temporary storage safety net when RAM was full but my swap partition is constantly being used even though I sometimes have as much as 3GB free RAM. ...
2
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1answer
104 views

Btrfs subvolume @home not mounted kernel upgrade 3.17

i'm having trouble upgrading my kernel to the latest 3.17 rc3 mainline kernel. I'm currently on a patched kernel 3.13 for my Acer chromebook c720p, the 3.17 kernel would give me support for touchpad ...
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0answers
18 views

How to build kernel with different flags?

Following the instructions here (https://wiki.ubuntu.com/KernelTeam/GitKernelBuild) I built a development version of the kernel. I copied the old config, called make oldconfig and then modified ...