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

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Block device drivers for linux kernel > 2.6

I am new to drivers development under linux kernel. After starting with the simple examples from the book Linux Device Drivers v3, I realised that the block driver API has been totally changed since ...
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1answer
55 views

Low disk Space in Root Filesystem Error

The system gives me the following error: The volume "Filesystem Root" has only 713.9 MB disk space remaining. You can free up disk space by removing unused programs or files, or moving files to ...
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1answer
153 views

After upgrade to kernel 3.16.0-30-generic I cannot use the keyboard

After installation of 14.10 and the "automatic upgrade" of the kernel to 3.16.0-30-generic from 3.16.0-23-generic I cannot use my keyboard to enter my passphrase for decrypting my physical drive. ...
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33 views

Boot DVD failed w/Kernel panic - not syncing: Fatal exception in interrupt

Trying to install Ubuntu 14.04.1 LTS This is a brand new ASUS w/ Windows 8 pre-installed. I'm not trying to do a dual boot or anything. I've searched the forums and google and have already disabled ...
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1answer
39 views

Loading freezes after kernel update

I installed new kernel - 3.19 today, previous kernel is - 3.16.0-30-generic. New kernel with the same configuration that was in previous and grub config is the same too..., instead of vmlinuz and ...
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1answer
44 views

Kernel Panic after upgrade to 14.10

My new kernel panics and won't boot after upgrading to 14.10. The output with a stack trace is fed to the screen, but I can't roll up, so I don't know what the problem is. I can boot if I use the ...
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1answer
13 views

Loading Session Applications

How does Ubuntu Load previously opened applications on startup? (I want to code and modify that functionality present in the system preferences manually )
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35 views

Kernel Headers 3.10.18 not found in VMware Kernel Module Updater

I had Ubuntu 14.10 and VMware Player 7.0.0 installed on my Acer Chromebook 11. Wwhen I open VMware, I get the exact same error message as mentioned this thread - "What is the path to the kernel ...
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32 views

Compiling the Davicom driver on RK3188 chipset

I want to compile the module dm9601.c for ubuntu 14.04 on the mentioned chipset. I have read up the tutorials of Ian Morisson, e.g. here and here. I am also failiar with this. On an MK802 IV ...
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1answer
674 views

Boot Error - ACPI PCC Probe Failed

ACPI PCC Probe Failed is the error that pops up instead of the default GRUB loader after I updated my kernel to 3.19. I searched around and couldn't find much information except that it is a known ...
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32 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 ...
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137 views

black screen since kernel 3.13.0-45 on ASUS F200M

My Asus F200m is running Kubuntu 14.04 LTS for a while : Every thing is perfect and it seems it uses Intel 7th Generation CPU and Intel HD Graphics. Then a kernel update to 3.13.0-45.generic and now ...
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9 views

T9 keyboard using numeric keys

after bought an gamer mouse, that have 12 numeric keys at left side, i was wondering how to do an T9 keyboard to use that keys on ubuntu? I'm working with java but can't figure out how to integrate ...
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1answer
71 views

How do I get into recovery mode on ubuntu 14.04 if the option not showing

I just boot up my laptop then run the sudo apt-get update command, but there's an error says [username] is not in the sudoers file. This incident will be reported. .so I search the google for ...
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59 views

brightness fuction key not works Kernel above 3.14?

I am Having Asus K55vd 64 bit laptop running Ubuntu 14.04 and Opensuse 13.2. I have problem for function keys (Wireless ,Brightness,Touchpad,sound). when i upgrade kernel above 3.14 the brightness ...
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37 views

Cannot compile kernel?

I recently re installed my ubuntu and got it updated to 14.1..it has a generic kernel 3.16 as we all know..however, when I started to compile the kernel 3.19(downloaded from the official site) the ...
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13 views

About TCP/IP Protocol [duplicate]

How to find the TCP protocol version used in older version kernel-2.6.23 & newer version kernel-3.13.0-32 generic #57 ?? I tried to find it in the google, but I am unable to get the answer, ...
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53 views

Firefox crashes not due to plugins-latest FF on Ubuntu14.04

Firefox ver35.0 crashes after running videos for a while or even after seeing many .Gifs on Ubuntu 14.04 I have reinstalled FF and Ubuntu too. No luck. One window says; Must restart FF. Other window ...
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14 views

SCHED_BATCH policy for schedtool in Ubuntu 14.04

The INSTALL file of schedtool says that the SCHED_BATCH policy (-B) is implemented in kernels 2.6.16+. However, I am unable to use this policy in Ubuntu 14.04 (kernel 3.13.0-45)? The output of ...
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19 views

<AUDIO> Sharp blips and noise after kernel upgrade

I recently built and started using 3.14.22 kernel instead of default Ubuntu kernel 3.5.57 (that came pre-installed) on my laptop. With this new kernel I get buzzing noise in headphones continuously ...
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1answer
27 views

installing valgrind ./configure fails to produce makefile

I'm trying to install valgrind and it looks as though ./configure is failing with configure: error: Valgrind works on kernels 2.4, 2.6. Does this mean that I have to install a new kernel? The ...
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1answer
97 views

Reinstalling the 14.10 standard kernel

I tampered a bit with the 3.18 kernel and would like to go back to the standard out of the box kernel of 14.10. How can I do this in a proper way? I executed already sudo apt-get install ...
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23 views

Openstack + Ubuntu Utopic/Trusty + nr_requests

Anyone know why ubuntu utopic/trusty doesn't allow to change nr_requests and I/O scheduler for instance that is running on the cloud using openstack? echo 129 > /sys/block/vda/queue/nr_requests ...
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33 views

Driver is automatically removed after kernel update

I had a problems with old wi-fi driver, so I have installed newer package, downloaded from the internet. Each time I had updates for kernel - this driver was removed after reboot, so I manually ...
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15 views

Is it possible to reduce the v4l source tree to just the modules I need?

I have a PVR card that needs a number of custom-built modules from linux-media (aka v4l). These are linked to the current kernel so every kernel upgrade, I have to set put the computer in a trance ...
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9 views

Can't read trace of tftpboot kernel panic - too long

I am trying to install a new kernel using tftpboot. When the kernel is loading, it throws a stack trace. It locks up the system so only a hard restart will work. Shift-pgup will not work either. It's ...
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1answer
490 views

14.10: VirtualBox “No suitable module for running kernel found”, Cannot Find Kernel Source

After the 14.10 update to VirtualBox, I can no longer run my boxes. Of note, running sudo service virtualbox status returns VirtualBox kernel module is not loaded and running sudo service virtualbox ...
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25 views

put ALSA as module ERROR

I've got a problem. I have to enable on my kernel ALSA from built-in to Module because I need to install Realtek linux driver for ALC260. If I change it in my kernel configuration and I run make ...
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1answer
26 views

How is Grub updated after each kernel upgrade?

How I think I got into the problem After the system installation I proceeded to install upstream kernel, changed /etc/initramfs-tools/conf.d/resume by commenting out the RESUME... line and then I run ...
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11 views

kernel.yama.protected_nonaccess_hardlinks is an unknown key

I want to clear the snapshots of Cassandra using : nodetool -h localhost -p 7199 clearsnapshot but it gives me an exception : Exception in thread "main" FSWriteError in ...
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88 views

Error while installing Opencv on ubuntu 14.10

when i am installing Opencv from this blog in the make step i am getting this error /usr/bin/ld: /usr/local/lib/libavcodec.a(avpacket.o): relocation R_X86_64_32S against av_destruct_packet' can not ...
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1answer
31 views

Massively broken boot and partition system

My machine has a single 2TB HDD, with 3 partitions: /dev/sda1 fat32 512MB /dev/sda2 ext2 244MB /dev/sda3 ext4 1.82TB My 14.04 was complaining of 0 bytes on /boot, so I went in and done a sudo ...
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27 views

Difference in scheduler, 64-bit vs 32 bit

So I am working on a fairly new linux kernel (3.10.9), and I was wondering if there was a difference in the way the scheduler works from 32 bit to 64 bit. I am wondering because I am running a ...
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155 views

VirtualBox for Ubuntu 14.10 Kernel driver not installed (rc=-1908)

I have this error message: Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. ...
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45 views

How to blacklist zfs kernel module during boot?

How to disable ZFS kernel-module before boot in grub? It is mentioned that some modules can be disabled through grub command line in similar question. Unfortunately this method is not working with ...
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51 views

how kernel gets upgraded on ubuntu 14.04 installation?

There are linux-generic and linux-image-generic packages, that track latest linux-image package as their dependency. Those packages could be used to update kernel automatically but they aren't ...
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30 views

delete the wrong kernel [duplicate]

I just deleted, by mistake the kernel of my ubuntu, with the command line (it was something like purge headers and image generic: sorry but I can't remember the words, it's just a thing i do anytime ...
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0answers
92 views

Ubuntu snappy not booting

I'm trying to boot Ubuntu snappy on a BBB and after I've corrected the uEnv.txt as posted on ubuntu core webdm alpha for Beaglebone Black not booting it freezes at Starting kernel .... The full upboot ...
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19 views

get kernel panic log

My system keeps hanging every several hours. I think the problem is somehow connected with network, because plugging ethernet cable eliminates the problem (even if ethernet is used locally only). If I ...
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43 views

How to keep linux-cloud-tools-virtual in sync with my kernel?

The Ubuntu 14.04 package linux-cloud-tools-virtual, used for compatibility with Hyper-V, depends on linux-cloud-tools-3.13.0-44-generic. However, the standard installed kernel is 3.13.0-32, which ...
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23 views

kernel panic not syncing attampt to kill init

I'm getting kernel panic error in kvm machine, kvm machine is on lvm storage and we can't boot vm's from CD or DVD. so please help me out from this problem. please find the attached scree shot for ...
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1answer
50 views

Can't install/remove packages - update-initramfs with little space on /boot

When I try to remove any package, I get (Reading database ... 604878 files and directories currently installed.) Removing bootchart (0.90.2-8ubuntu2) ... [skipped] update-initramfs: Generating ...
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0answers
17 views

Logitech USB headset holding up parts of boot process

I am having problems with my Logitech USB Headset. When I have my headset plugged in when I turn on my computer, it takes longer to boot than usual. When I log in, all fonts are not anti-aliased, the ...
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1answer
49 views

Why one would use default Ubuntu kernel instead of latest stable kernel?

I've been using Ubuntu for long time. However, I'm still confused about one issue. Why one would use default Ubuntu kernel(3.16 atm) instead of latest stable kernel(3.18 atm)? Is this only because of ...
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20 views

Boot fail running 14.04 - have boot-repair pastebin

Not sure where next to turn I've tried boot-repair and been given then the pastebin info http://paste.ubuntu.com/9972046/ The error message is that /dev/mapper/ubuntu--vg-root can't be found I can ...
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129 views

Upgrading Linux Kernel 3.13.0-45-generic to 3.18.4 [duplicate]

I wonder that is it possible to upgrade from any linux kernel to any other kernel? I'm having linux kernel 3.13.0 and i want to upgrade to 3.18.4. Release notes of 3.18.4 kernel says that all users ...
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0answers
16 views

How can I modify the Ubuntu-12.04 Server ISO to include non-default kernel and headers (lts-raring in my case)

I have an ISO which I am customizing via preseeding. I am able to customize it from the preseeding point of view but I want to do a little more. The ISO image I am using is the standard ...
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0answers
41 views

Boots from old kernel

Ran software update from Manager (Linux-3.13.0-44 is newest). When it finished, I went to Grub Customizer to remove old kernel listings. (Don't always do this, so I had kernels 3.13.0-32, 36, & 43 ...
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44 views

ERROR: wl_scan_notify_status : wlan0 Scan_results error (-22) direct kernel output to tty

I have been coding on my tty's lately on my Linux Mint 17.1 'Rebecca' machine, and I have noticed that the kernel will start spitting direct output, in particular the error "ERROR: ...
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2answers
38 views

Is there an Ubuntu distribution which is customized to run on the android kernel? [duplicate]

Every android device has a more or less customized kernel. Most of these are open source?!(I am not sure about the "most".) Is there a Linux or even better ubuntu distro which comes with has support ...