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

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114 views

Updated kernel to mainline (4.3.3), but apt-get upgrade keeps downloading headers & image for 4.2

I have a Surface Pro 2 running ubuntu, and prior to kernel 4.x it's been quite problematic (wifi/trackpad/screen etc). I've been updating my kernel to mainline, first 4.0, then 4.2 and more recently 4....
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85 views

Capturing a kernel dump from a CPU soft lockup at boot?

I am SAN Booting an Ubuntu server and have configured the 14.04.2 client to the best of my ability according to: https://wiki.ubuntu.com/Kernel/CrashdumpRecipe It seems like the article works fine ...
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732 views

force pam to return success

I want to be able to login (without systemd-user-sessions.service running, is it possible?). I masked the systemd-user-sessions.service, rebooted, but PAM wont let me in (I can login in tty1 though): ...
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49 views

On booting I get Grub menu instead of splash page

I am running Ubuntu MATE 15.04 on HP Spectre X360 [no dual boot] I have had troubles with booting and have been able to solve Software Updater Problems getting rid of redundant kernel files. I am ...
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27 views

I have type “ sudo sensors-detect” and my display become muddy

I am using Lenovo Z 50-70 laptop with i5 4210U processor. I type sudo sensors-detect and yes to all options. This make my display muddy. How can I get back to default configuration. Using Ubuntu 14....
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67 views

How to grow LVM ext2 (UEFI) boot partition @ /dev/sda1 ubuntu15.10 standalone install

I'm a complete newb when it comes to Linux as a whole, currently taking a Linux-101 class... so I decided to dive into it and rid my laptop of Win-8 ;-) After much trouble with BIOS configurations, ...
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113 views

How to recompile linux kernel and make an iso installation for ubuntu

I want to install Ubuntu server 14.04.3 on a my server which has an intel PCI-E 10 Gigabit* network card. The installation wizard does not detect this network since the firmware is not available on ...
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187 views

Replacing the default Kernel in Ubuntu 15.10 with kernel 3.19.0-25

I am having problems getting Ubuntu to work on my ASUS ROG G20 with any kernel greater than 3.19.0-25. See thread: ASUS ROG G20aj Running Ubuntu My question is this - Is there a way to edit the ...
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89 views

Trouble with Lubuntu 15.10 after cold boot

Recently, i have started having trouble with booting Lubuntu. After turning on, i have to restart computer 5-8 times to successfully boot. Here is what is happening on each start: first, i get black ...
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117 views

Ubuntu 15.10: restoring USB storage access

Starting ok situation: running Ubuntu 15.10 with kernel 4.2.0-22-generic. I have an external USB 3.0 Icybox with 4 SATA drives which all contribute to a ZFS pool; as I updated to -21 my openzfs ...
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2k views

Failed to start Load Kernel Modules 15.04

Lenovo ThinkPad T410 upgraded from 14.04 to 15.04 in preparation for 15.10. The first FAILED is: Failed to start Load Kernel Modules. The second FAILED is: Failed to start Apply Kernel Variables. It ...
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140 views

After Upgrading to 15.10 from 15.04, EC2 Webservers Have Become Very Unstable

I have a variety of Ubuntu machines running in production, with about 30 that were upgraded from 15.04 to 15.10. With most of the machines, the upgrade has been a breeze and everything has functioned ...
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448 views

USB3 to Ethernet adapter neither properly detected nor functional

My laptop is a Dell XPS 15 (9550) running ubuntu 15.10. My USB to Ethernet adapter is an Aukey CB-C17 (http://www.amazon.fr/gp/product/B013HUDG0U). My question is simple: How to make appear the ...
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77 views

How right is to set grub booter file to control fan acpi by linux

What is the right stroke to set in grub booter file to control fan by linux for notebook Acer TravelMate 4652LMi osi_acpi=Linux or acpi_osi=Linux or some other parameter
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66 views

How to set rtlinux thread priority in Linux

How to set the priority of real time threads in rtlinux. Which is highest priority and which is lowest?
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17 views

Slow resume from s2disk

when I resume after suspending with s2disk the machine is often very slow for a few minutes. I think this has to do with my swap partition being too small. Here is a screenshot of what gparted shows: ...
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211 views

/etc/modules not working as expected

I am running Ubuntu 15.10 desktop on my laptop. When I execute: $ sudo modprobe b43 module b43 is loaded and my wifi interface starts working, I can connect to my SSID home network fine. Now I ...
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441 views

Ubuntu 14.04 installed on Samsung 850 Pro 512GB results in data corruption

In short: Does anybody know why running Ubuntu 14.04.3 LTS on Samsung 850 Pro 512GB drive results in corrupted file system and random files disappearing? Here is the long story: In 2013 I got ...
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138 views

Kernel keeps killing Java process due to Out of Memory

I am trying to solve a CPLEX problem using the Java library but the kernel keeps killing my process due to "Out of Memory". I've tried setting memory limits on the CPLEX program and I've tried ...
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25 views

Is a flickery screen bad?

I am running 14.04 with the 4.3 kernel (recently updated due to driver issues) and I've noticed a lot of flickery screen things going on. Usually when I scroll or when things update quickly I get a ...
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94 views

UBUNTU 15.10: after most recent kernel update to 4.2.0-17.21, wi-fi, USB mouse and brightness not working

After most recent kernel update to 4.2.0-17.21 in Ubuntu 15.10, wi-fi, USB mouse and brightness are not working. I used Advanced Options in GRUB to start system normally. However, how to fix this ...
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20 views

how can one debug the keyboard kernel driver?

I have a Lenovo Thinkpad Yoga S3 (spring 2015). it has a rather strange bug when it comes to the internal keyboard: When waking up from suspen, the internal keyboard no longer reacts -- some times. ...
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810 views

Updated to 15.10 and now VMware workstation 11 will not start

I ran into this problem after upgrading to ubuntu 15.10. When I start vmware it pops up saying that it need to compile several modules into the running kernel. It failed with a error message saying ...
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182 views

revert kernel version change

I'm trying to intstall virtualbox-dkms, and trying the usual sudo apt-get- install virtualbox-dkms yields: Preparing to unpack .../virtualbox-dkms_4.3.10-dfsg-1ubuntu5_all.deb ... Unpacking ...
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81 views

ubuntu 14.04 lts doesn't boot since 3.13.0-64

This is a DELL inspiron 3551, with Ubuntu 14.04 lts 64 bits preinstalled processor: Intel® Pentium(R) CPU N3540 @ 2.16GHz × 4. Quickly after system update, it starts to crash when booting. I don't ...
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28 views

Use different drivers for two identical peripherals

I have two NICs that are the same type (plain old VirtualBox NICs). Is it possible to use a different driver for each one? From what I've seen when I load a module it picks up on all the supported ...
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259 views

How to compile kernel with custom version string?

I'm trying to compile a stock kernel for ubuntu 15.10 (4.2.0), but would like the kernel version to be different, with minor text addition in the end so it doesn't conflict with the original one. To ...
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57 views

how to enable 1MB dma-kmalloc

I'm running a ubuntu 15.10 VM and testing code that will allocate 1MB dma buffers. However, from the /proc/slabinfo, the max that can be allocated is 8K dma-kmalloc-8192 0 0 8192 4 ...
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192 views

DPKG Issues. Hangs, and won't let me run any commands

Ubuntu randomlly decided to install this huge batch of updates today and I let it. It froze however midway. I gave it an extra hour with no progress at all so I killed it and forced a hard restart. ...
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115 views

Android rom and kernel build error

I am trying android building but I have error I cant solve it. help please I am using ubuntu 15.04 compile error
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484 views

Video recording device detected but can't use it

I have a StarTech SVID2USB23 device like this: https://sgcdn.startech.com/005329/media/sets/SVID2USB23_Manual/SVID2USB23.pdf In LSUSB it appears as this: Bus 003 Device 007: ID eb1a:5051 eMPIA ...
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46 views

Kernel panic…/vmlinuz not found loop. I'm stuck for a month!

I have been stuck, and tried for so long now, I need help! I don't know what I did then I am unable to boot into my ubuntu 14.04, installed on partition SDB8! I have reinstalled grub2 many times now, ...
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260 views

Missing “asm/types.h” or “asm-generic/types.h” : fatal error : No such file or directory

I am trying to compile my sdk(switching development kit) code on ubuntu 14.04. When I am doing make, I am getting the following error : /lib/modules/3.13.0-32-generic/build/include/uapi/linux/types....
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176 views

Ubuntu 14.04 VM kernel panics once every ~5-9 days on Hyper-V

I have an x64 Ubuntu 14.04.3 LTS virtual machine running the hardware monitoring and status software Nagios. The VM seems to be kernel panicking once every 5-9 days. I am unable to pin down the cause. ...
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36 views

GRUB Multiboot and Kernel Updates

A couple of days ago, I installed Xubuntu 14.04 alongside my Ubuntu 14.04 system. I had to do a little work to get Ubuntu 14.04 to be the default system, but that's resolved now. The thing is, if I ...
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74 views

No sound anymore on Lubuntu 14.04.3, Kernel 3.13.0-63

The current version of Lubuntu (kernel 3.13.0-63 in use now) produces no sound anymore. Neither Audacious, Gnome player, YouTube or CD player produce sound. My installation CD (Lubuntu distribution 14....
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68 views

kernel boot takes too long, probably asus makro key usb keyboard related

I would like to solve my long boot issue. 3.19.0-28-generic #30-Ubuntu SMP Mon Aug 31 15:52:51 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux I think it might be related to ASUS ASUS ROG Macrokey keyboard ...
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223 views

end Kernel Panic (14.04)

I'm new to Ubuntu, so you'll have to forgive my naivety. I was watching TV online and my laptop froze (Screen darkened, nothing responding), I left it for around 5 minutes hoping it'd sort itself out....
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185 views

How do I start my Laptop with root partition on lvm2 thin pool

My Laptop is configured as dual boot system with Ubuntu 14.04 (and windows 8.1). Lately I replaced the dedicated root and swap partitions with a lvm2 partition (VG (Volume Group) LinuxBereich) ...
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188 views

Kernel Panic - not syncing: VFS Unable to mount Root is on unknown-block(0,0)

I received a Kernel Panic error after updating Ubuntu server. After passing the GRUB menu, I received the following error. I have been hosting a mediawiki on that server that is not backed up. I do ...
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20 views

kernel building errors investigation

Tried to built kernel using this simple guide: https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel I've got only one "...all.deb" file instead of 3 files. How can I track errors? Are there any logs of ...
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70 views

linux-image-3.19.-.26-generic broken

For reference, I'm on Xubuntu Vivid, installed on a ASUS E451LD (aka a PL451LD). It has an Intel/Nvidia Optimus GPU setup. If I boot off a 3.19.0-26.28 kernel, it sticks on a blank screen or on the ...
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268 views

Full downgrade from 14.04.3 lts-vivid stack to standard 14.04 lts stack

the issue is well represented by the title. How can I completely revert the 14.04.3 lts-vivid stack (3.19 kernel + updated graphics stack) to the standard 14.04.0/1 trusty stack? I know that the most ...
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2k views

NUC 5CPYH + Intel 3165 + Ubuntu 15.04 or 14.04. Here's how.

This page describes how to get the Intel 3165 wireless card working on Ubuntu 15.04 on the Intel NUC 5CPYH. To fix this problem: Check the linux kernel you are using $ uname -r Even if you've ...
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67 views

unable to update to the latest kernel

I had troubles with kernels and asked a question on how to remove them Can I delete my most recent kernels With the help I received I did manage to delete the offending kernels. After that I ...
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284 views

syslog and kern.log multiple GB in size filled with pcieport error messages

After getting a disk usage warning, I noticed my syslog and kern.log were multiple GBs in size (20GB each). I then used this askubuntu post to clear the log files but today I find that they have again ...
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117 views

Prevent Immediate Resume after Suspend

I am running Ubuntu 14.04 on a Dell I7352-3111SLV 13 inch touchscreen. As per this post I've fixed my touchpad, But my machine now resumes from suspend as soon as it finishes the power down cycle. So,...
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45 views

no suitable module for running kernel found after update

after some update of 12.04 at start up, black screen shows up with things written on it and there's an error. a red star and then "no suitable module for running kernel found". I have only one option ...
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68 views

Onboard does not work with touch

Onboard (the Ubuntu default onscreen keyboard) is working fine basically, but it does not work with touch. But this is what I need it for. I just can't press any button. I can press Onboard buttons ...
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89 views

Surface Pro 1 with Ubuntu 15.04 Problem; You need to load the kernel first

I've installed Ubuntu successfully then told me to reboot, but I'm stuck in the screen where I had to choose four options: 1) Try Ubuntu without installing 2) Install Ubuntu 3) OEM Install 4) Check ...