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

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7
votes
2answers
360 views

Is the Ubuntu kernel 100% free software?

I got curious today, and ran vrms to check which non-free packages I had. To my great surprise, no kernel packages appeared. It used to be the case that the kernel contained some small non-free ...
15
votes
5answers
2k views

Is it safe to delete the old kernels from menu.lst? [duplicate]

When the computer starts, GRUB shows a long list of previous kernels in addition to the usual stuff, e.g. Ubuntu 10.10, kernel 2.6.35-23-generic Ubuntu 10.10, kernel 2.6.35-23-generic (recovery mode) ...
0
votes
1answer
79 views

How to upgrade the kernel correctly?

Running uname -r in a terminal gives an output saying 3.13.0-37-generic, but I am trying to upgrade the kernel to 3.16, and indeed I have ran sudo aptitude safe-upgrade which installed ...
0
votes
1answer
38 views

grub and libfuse error

After I updated packages: gnupg gpgv libgcrypt11 libtiff5 (on Ubuntu 14.04.2 LTS Linux version 3.13.0-48-generic) and then did an apt-get autoremove which removed: linux-headers-3.13.0-46 ...
1
vote
0answers
60 views

Deleting old kernel modules manually

Basically I like to have a "clean" system; so I run the ubuntu-tweak janitor from time to time to delete the old kernels. Today I did some manual checking and found the subdirectory 3.13.0-49-generic ...
1
vote
1answer
69 views

Double (different) key press detected

I have Windows 8 and Ubuntu 14.10 as dual boot. I have PS2 keyboard. Sometimes randomly (can't reproduce yet) Ubuntu detects multiple different key presses when I press specific buttons. Some buttons ...
1
vote
0answers
76 views

BGRT Errors on boot - Custom compiled kernel 3.19.3

After compiling my own kernel (yes, I know I'm not entitled to any support), I receive this message on boot: [ 0.077204] Ignoring BGRT: invalid status 0 (expected 1) It disappears after a few ...
1
vote
2answers
4k views

3.15.5 stable kernel not building, “gzip: stdout: no space left on device”, /boot is NOT full

Running into an issue building the 3.15.5 stable kernel on Ubuntu 14.04 LTS. Relevant portion of sudo make modules_install install INSTALL /lib/firmware/edgeport/down2.fw INSTALL ...
1
vote
0answers
64 views

Dell e7440, sleep sometimes fails, kernel logs show ACPI errors

I have a new Dell Latitude E7440 with Ubuntu 14.04.2. Sometimes (but not always), after sleeping, I cannot resume, as after trying to resume one of the following happens: I can move the mouse but ...
0
votes
0answers
23 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 ...
0
votes
0answers
20 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 ...
0
votes
0answers
37 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 ...
0
votes
1answer
25 views

how to check if zfs is using the kernel module

I am having perfomance troubles (transfer rates only about 50MB/s using 6 2TB server hdds WDC WD2003FYYS, each doing app 150 MB/s) with my raidz and was hoping to increase it with the ZFS on Linux ...
2
votes
1answer
93 views

dkms Installed kernel module but not working after reboot

I bought a keyboard that is shown on lsusb: Bus 002 Device 009: ID 0c45:7603 Microdia but the Ctrl, Windows/Super and Alt buttons are all mapped to Shift button. So I followed the hardware code and ...
0
votes
1answer
3k views

any idea what type of error this is - Machine check / Kernel Panic

I have been getting the following problem running Ubuntu 12.10. Basically, it freezes completely, doesn't respond to keyboard or mouse, CAPS won't change and alt+sys req+REISUB doesn't do anything. ...
0
votes
2answers
200 views

Nvidia Driver Install Error - “Kernel module failed to build.”

I'm trying to install this because Nouveau / the default driver, is unstable for me, and eventually results in GPU lockups unless I'm running low graphic mode. Got this error while trying to install ...
1
vote
0answers
53 views

FRITZ!WLAN USB Stick N v2 under ubuntu 14.10 possible?

Edit April 7, 2015: Meanwhile I installed a mainline kernel, which works fine most of the time. After suspends, however, it often fails to reconnect, also, the number of failures increases if I ...
1
vote
0answers
31 views

Kernel reports wlan0 “connection lost” frequently [duplicate]

I'm getting this message frequently: wlan0: Connection to AP f8:d1:11:44:01:06 lost This happens only on my work, not my house. I workaround this with sudo service network-manager restart or ...
0
votes
1answer
774 views

How to patch TuxLol on 14.04

I installed League of Legends on Ubuntu 14.04 LTS. It installed and now I can play however the in game store dosent seem to work with the most recent patch. I read How do I install tuxLoL on Ubuntu ...
1
vote
1answer
4k views

hostapd Failed to update rate sets in kernel module

I'm getting this error launching hostapd with minimal conf Failed to update rate sets in kernel module I've just installed Ubuntu-GNOME 13.04. When I was using Ubuntu 12.04 did not receive this ...
0
votes
1answer
35 views

How to reinstall the kernel with a crippled OS?

I use Ubuntu 14.10 and as it happens quite often my /boot partition got full. Usually in this case I use apt-get to manually remove one or a few old kernels and everything is fine again for a few ...
1
vote
1answer
4k views

How can I troubleshoot why Ubuntu keeps crashing on my laptop?

I have a one year old Acer Aspire 4752G netbook running Kubuntu 12.04 LTS with all the latest distribution updates installed. It was previously running great until about a week ago when it suddenly ...
22
votes
1answer
20k views

How do I re-run boot loader?

Running sudo apt-get -f install said that The link /vmlinuz.old is a damaged link and: you may need to re-run your boot loader[grub] Here's the full output: user@chrubuntu:~$ sudo apt-get -f ...
0
votes
0answers
58 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 ...
0
votes
0answers
38 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 ...
0
votes
1answer
44 views

Local version during kernel build broken

I'm trying to build a custom variant of the 3.13.0-43 kernel on Ubuntu 14.04. Following the normal procedure (directions posted at https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel) is not working for ...
1
vote
1answer
145 views

How to install Ubuntu Trusty 14.04 in a qemu virtual machine

I'm running Debian Jessie amd64 with qemu version 1:2.1+dfsg-11 and want to install Ubuntu 14.04 for amd64 in a qemu virtual machine. But the installation process doesn't start because of a kernel ...
0
votes
0answers
17 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 ...
-1
votes
1answer
16 views

custom kernel for secure system

I am pretty new to the linux community and I've started learning it for last few months. After learning the basics of commands and system architecture im now trying to learn the grass root level ...
0
votes
0answers
16 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) ...
1
vote
3answers
4k views

cannot install Ubuntu (message about PAE) [duplicate]

I received the error message below on the black terminal screen after waiting for a reboot.. I tried to find "forcepae" in the available options but couldn't. Can Anyone please help? ERROR: PAE is ...
-1
votes
0answers
18 views

Building and Flashing new kernel

How can i build and install a new Linux Kernel to the Ubuntu. I wanted to build the kernel and reload Ubuntu with new kernel -Thomas
0
votes
1answer
96 views

xubuntu freezes every time [duplicate]

I am asking this as there does not seem a clear way to diagnose the problem. I have searched several sites including this one. After a few minutes Xubuntu freezes and I can't use the mouse or ...
0
votes
0answers
36 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 ...
5
votes
4answers
213 views

Writing to a specific memory location

I am trying to edit a file inside /proc/devices-tree to be exact, and i am unable to do so, I am getting: "permission denied" or "Input/Output error". I have tried all possible combinations of ...
-1
votes
1answer
21 views

Loaded Modules Information using a trusted lsmod command

I have copied lsmod command script from /sbin/lsmod to a directory. I renamed lsmod to elsmod. Now when i run this command from a script it doesn't give me any output. what should i do to get the ...
5
votes
1answer
7k views

How to reinstall newest Linux Kernel?

Hello I upgraded all packages on my Ubuntu, and kernel also. But in upgrading process kernel upgrade failed, and I must always after grub load select older kernel. It is a terminal command to ...
0
votes
0answers
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 ...
0
votes
1answer
54 views

Why is there no /proc/sys/kernel/softlockup_thresh

and, more importantly, how can I adjust this threshold for Ubuntu 14.04 server installations? I have standard Ubuntu 14.04 server VMs crashing due to CPU softlocks and VMWare recommends adjusting ...
0
votes
2answers
111 views

CPU frequency control

I have a kubuntu 14.04 with the latest HWE kernel (3.16.0-31-generic), and a Xeon 1246v3 processor (which is basically an i7 4770 with ecc support). The processor has base frequency of 3.5 ghz, and ...
1
vote
2answers
130 views

Sound no longer recognized after latest kernel upgrade (14.04)

This morning Software Updater showed notification of new updates. The kernel was part of the update which then required a reboot. Once I rebooted, my sound was gone and no longer recognized buy the ...
3
votes
1answer
49 views

Dell 7537 syslog over 40 GB

I am a new user and not a techie, but i love ubuntu. I am at 14.10 currently and have almost 60GB allocated to /var but lately the /var folder has been eating up almost over 40GB of space, the last ...
0
votes
1answer
196 views

Kernel panic while installing CentOS 7 in VirtualBox

I have a laptop with Xubuntu desktop 14.10 , and I installed VirtualBox and updated it to the latest version . I'm trying to install CentOS 7 (source downloaded from the official site) as a VM, ...
0
votes
0answers
25 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 ...
1
vote
1answer
94 views

How to generate linux-tools packages for customized kernel?

How to generate linux-tools and linux-cloud-tools packages for customized kernel by using Ubuntu build scripts? Tried to add do_tools=true which generates ...
-1
votes
1answer
46 views

uname -a gives a wrong kernel version

I have the 3.16 Linux kernel package installed on my Ubuntu 14.10 server, but when i try to run uname -a it gives me this: Linux example.com 3.13.0-36-generic #63-Ubuntu SMP Wed Sep 3 21:30:07 UTC ...
1
vote
0answers
182 views

How to update kernel to 3.19 on 14.04 with i915 Intel graphics?

On 14.04.2 LTS (amd64), I need to update the Linux kernel to 3.19+ (because it adds support for some hardware I have). The computer uses EFI and has an integrated Intel Graphics controller. lspci ...
0
votes
1answer
985 views

How to install exfat-nofuse?

Has anybody of you tried to install exfat-nofuse. I am not sure how to install it. Compile it as a module, or recompile my kernel?... Also, do i have to recompile it after every kernel update? Will ...
0
votes
0answers
13 views

I want to download Ubuntu 14.04 source to my CentOS :Linux jwang 2.6.32-279.el6.x86_64 [duplicate]

I want to download Ubuntu to my 14.04 source to my CenTOS :Linux jwang 2.6.32-279.el6.x86_64 #1 SMP Fri Jun 22 12:19:21 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux I also I would like to compile this ...
0
votes
1answer
81 views

Kernel module compilation fails (gcc: error: elf_x86_64: No such file or directory)

I'm trying to compile a simple kernel module, but the compilation fails due to a wrong argument passed by make to gcc. This is the Makefile: obj-m += test.o all: make -C /lib/modules/$(shell ...