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

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5
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1answer
3k views

Difference between Intel i915_bpo and i915

I have a Intel i7 6700 Skylake CPU and suffering from constant kernel panic. My best guess is that it is related to the Skylake graphics driver. And also I notice that in Linux kernel 3.19 series, the ...
0
votes
1answer
436 views

Why does my kernel fail to build?

So I am a Linux noob, but I am still working on getting my Intel tablet working with all the devices, this is very much a learning experience for me. Plan in the end is to just have a bootable image ...
2
votes
2answers
538 views

Switching back from development to default kernel

I'm on Ubuntu 14.04. My kernel version is kernel: 3.16.0-031600rc4-generic. I must at some point, for some reason, have switched to a development kernel but I can't remember how. How do I switch back ...
2
votes
1answer
2k views

Values of WCHAN in ps

What does the WCHAN (waiting channel) mean exactly? what can be its value and what those values represents? I tried to find them but got nothing.
0
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1answer
102 views

How do I get rid of old linux-headers-3.xx.x-xx files? [duplicate]

I frequently run into the problem that I don't have enough space on /boot left. When that happens, I use this answer to free space. The output of the command shown there gives me not only a bunch of ...
0
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1answer
140 views

keep getting kernel 3.19.0-28-generic must be compiled

I have this problem and I even did: sudo apt-get install linux-generic sudo apt-get install linux-headers-generic sudo apt-get install -y build-essential linux-headers-generic But it didn't help, ...
0
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0answers
38 views

Installing kernel, First time Linux User

Basically, I somehow got my Ubuntu 14.04 32 bit LTS to work on my free vmware workstation . It asked me to update and so I did. Now I need a lower linux kernel of 2.3. I have no clue how to do it or ...
0
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1answer
230 views

How to make a version of Linux kernel default in grub?

I am using Ubuntu 14.04 with Linux kernel 3.19.0.25. Earlier I had some issues with 3.19.0.28, my screen was freezing on boot, with 25 I am not facing those issues. So I want to make 25 my default ...
0
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0answers
116 views

Linux Kernel Compilation Error — cp: cannot stat 'scripts': No such file or directory

I need help to fix the error message below. As can be seen, I am trying to build Linux kernel, but for some reason, I keep getting the error below when I execute sudo fakeroot debian/rules binary-...
2
votes
1answer
187 views

“No network devices available” when wireless previously worked. (14.04 LTS)

I'm running Ubuntu 14.04 LTS on my laptop, the last time I used it (several weeks ago) the wireless was working fine. I turned it on today and no networks will show up, with the network menu saying "...
0
votes
1answer
637 views

Frequency scaling no longer works after kernel upgrade

Using kernel 3.13.0-37, CPU frequency scaling works and I can control it using the CPU frequency control applet. I have upgraded to kernel 3.16.0-38, the applet now informs me that CPU frequency ...
5
votes
1answer
2k views

How can I avoid kernel updates?

I want to freeze the kernel-version of Kubuntu 14.04.1 LTS Trusty. Is it enough to comment line 5 and 6 of the /etc/apt/source.list (see below)? 4 ... 5 deb http://de.archive.ubuntu.com/...
1
vote
1answer
62 views

Secure Auth/Encryption Smart Keyboard

Due to the nature of a personal subnet (hardened on the outside, trusting/naive on the inside) I'm starting a project within my network (routed by a Ubuntu 15.04 Desktop with OpenVPN public/local ...
1
vote
0answers
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....
4
votes
2answers
293 views

Kernel panic 1/10 times after resume from suspend

I have a HP Notebook 15 running Lubuntu 15.04. On occasion after closing the lid and having my laptop suspend, I get kernel panic when I resume. Caps lock is blinking, and the screen locks - I have ...
0
votes
1answer
92 views

Boot volume full?, problem removing old kernels

I know there are a lot of questions on this but I have been through a lot of them and can't seem to get past a problem. Steps so far - Removing old kernels via apt -> Fails due to lack of space ...
0
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0answers
75 views

Grub boots vmlinuz-3.13.0-37-generic but not 3.13.0-63

I am able to manually boot my Ubuntu when i tried the following from https://www.linux.com/learn/tutorials/776643-how-to-rescue-a-non-booting-grub-2-on-linux/ grub> set root=(hd0,2) grub> linux ...
0
votes
1answer
289 views

Kernel driver not installed (rc=-1908) — Again

After I read the solution in VBox on 14.04: Kernel driver not installed (rc=-1908) I got following error after install ... No suitable module for running kernel found invoke-rc.d: initscript ...
0
votes
0answers
105 views

Docker and linux-kernel-extra packages

I am using kernel version 4.2.1-040201-generic downloaded and installed from here. But since then my Docker is not working again and when I tried to upgrade it, it complained about being not able to ...
0
votes
1answer
189 views

Can't make, says Kernel source is missing

I'm trying to follow the instructions here http://wiki.freepbx.org/display/FOP/Installing+FreePBX+13+on+Ubuntu+Server+14.04.2+LTS to install FreePBX/Asterisk on my Ubuntu server. When I try to ...
0
votes
1answer
2k views

br_netfilter missing in ubuntu 14.04

I have the following problem when running docker.io: Running modprobe bridge nf_nat br_netfilter failed with message: modprobe: WARNING: Module br_netfilter not found. I tried running modprobe ...
0
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0answers
175 views

USB-disks disconnect

I have Ubuntu 15.04 on intel NUC NUC5i3RYB. The usb-disks disconnect and reconnect periodically (see dmesg logs below). I have tested with several USB-disks and they seem to behave alike (also disk ...
1
vote
1answer
252 views

How do I find out which driver version of BtrFS I am using?

I was reading through a couple of BtrFS articles online. Sometimes I saw statements like Do not use BtrFS versions older than 0.20rc1. How can I find out which version is in my Kernel?
1
vote
1answer
62 views

How to get debuginfo package for -rt kernel

I have Ubuntu 14.04 with 3.14.3-rt4 kernel. I have to use SystemTaptool and I must have debug symbols to use it. I follow the instruction in here but there are no debug symbols for my kernel and when ...
1
vote
1answer
192 views

Unmet dependencies, lost archives, and missing source packages while upgrading kernel to 4.2.0

While trying to update my kernel I found I was missing archives. This is the error message on my computer (and when I try to open synaptic to uninstall the packages) The package linux-headers-4.2.0-...
1
vote
1answer
130 views

What caused this crash shown in syslog?

What happened here? System was unresponsive when I attempted to log in next morning. Sep 21 12:38:02 pratchett org.freedesktop.Telepathy.AccountManager[2233]: (process:2488): GLib-GIO-WARNING **: ...
1
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0answers
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 ...
0
votes
0answers
344 views

Kernel panic under Ubuntu 15.04 64bits "kernel panic-not syncing: VFS: unable to mount root fs on unknown block(0,0)”

I had a kernel panic on my MacBook Pro, which led me to erase everything from it, and install Ubuntu 15.04 (64-bit) on it, from the mini iso, with the choice of erasing everything on the hard drive. ...
1
vote
1answer
608 views

EXT4-fs error on Ubuntu 15.04 crashing after installing an HDD for extra space, Kernel panic on live USB boot

Earlier last week I went ahead and bought a 1TB HDD so I could store some extra files on my work machine. Now I'm having problems with the system crashing. The first time I got the following error ...
0
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0answers
86 views

Internet connection slow when connected via wifi

When I connect to the internet via WiFi the speed is really slow. I tried lot of thing like modifying the ath9k.conf file among other things but this thread looks promising. http://ubuntuforums.org/...
1
vote
1answer
58 views

How can an internal hard drive be made completely inaccessible for the system?

I've "rescued" my whole main system HDD onto another fresh drive (using a live CD, to be able to easier access / and /usr from X11), and now I'd like to pretend as if I had physically removed the old ...
0
votes
0answers
121 views

Problems installing virtualbox in ubuntu 15.04

I have a serious problem installing virtualbox, install from the Ubuntu Software Center. Configure a Debian ISO image but the start my virtual machine I get the following error: Kernel driver not ...
2
votes
1answer
1k views

AUFS driver not loaded / found on kernel 4.* branch

I've tried upgrading my kernel from 3.19.0-22 to any of the kernel 4.* releases in Ubuntu 15.04 but upon rebooting I've found that docker doesn't work anymore. Sep 19 12:37:14 sniper docker[1098]: ...
1
vote
1answer
124 views

How do I recompile my kernel without qt3?

So I'm trying to recompile my kernel (it doesn't have uinput support but nm that). I followed the instructions on How to install needed Qt packages to build kernel on 14.04? but when I run ~/...
3
votes
1answer
1k views

Can't start LightDM after recent kernel update

Whenever I boot, it show Plymouth then goes to a screen full of boot log, I -think- the only relevant part is Starting Wait for Plymouth Boot Screen to Quit...es.ileged Tasks.s..p link was shut down......
1
vote
1answer
138 views

Disable IPv6 on 14.04 with IPv6 disabled kernel

How do i disable system wide IPv6 within ubuntu? I know so many answers in here about this but situation is different. This is an embedded device. Here is my conditions: IPv6 disabled in kernel to ...
9
votes
1answer
380 views

Is it OK to delete the /boot/initrd.img file on a running system

I have a server with a RAID1 root partition, but it has a small partition for /boot on each of the two drives: I 'dd' one to the other whenever an update is made. Unfortunately the /boot partition is ...
1
vote
0answers
224 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....
2
votes
1answer
572 views

Installing Linux 4.3 on existing Ubuntu release

Suppose we have a stable Ubuntu release installed, such as 15.04 or 14.10 (my case). Suppose we have no interest in upgrading userland software, but have a dire need for a state-of-the-art kernel (in ...
2
votes
1answer
828 views

How to check if the kernel version running is the one supported by Ubuntu?

When I boot my machine I get a list of installed available kernels to choose from, how do I know which kernel is the one that is supported by my particular Ubuntu distro version? See the following two ...
0
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0answers
126 views

installing specific kernel headers using preseed Ubuntu 14.04

I'm trying to install a specific kernel using preseed. Below is the preseed configuration I have. I need to install specific kernel headers. Is my preseed correct? d-i mirror/suite string trusty ...
0
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0answers
207 views

RTL8191SEvA with 3.19 kernel getting “No scan results”

One of our customers has a machine with (lspci output): 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8191SEvA Wireless LAN Controller (rev 10) wireless card and kernel 3.19 (3.19.0-...
0
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0answers
109 views

How do I install fglrx in an older Ubuntu kernel, and that kernel only?

I recently upgraded Ubuntu kernel to 3.19.0-28 and I tried to re-install the set of 4 fglrx modules for my AMD processor card (R9 390). I get this error Error! Bad return status for module build on ...
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0answers
190 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) ...
4
votes
2answers
90 views

How to report kernel issues

This is a followup to this other thread: USB ports not working all of a sudden I'm working on an Acer Aspire E 15, with the OS being Ubuntu Studio 14.04. I noticed that the last kernel version: ...
1
vote
0answers
191 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 ...
0
votes
0answers
324 views

Not Able To Compile Hello World Kernel Module

I am currently following this tutorial of making a makefile for the simple kernel hello world module. However, I have not been able to do so even after searching on the internet thoroughly for several ...
0
votes
0answers
31 views

Can't start Oracle VirtualBox: Kernel driver not installed (vboxdrv) [duplicate]

When I click start the installed virtual kali: Note: Kali-Linux-2.0.0-vbox-i686.ova Oracle VM virtual manager Ubuntu 14.0 LTS-Main OS ERROR pop up 1: Failed to open a session for virtual machine ...
0
votes
0answers
74 views

Ubuntu Keeps Freezing After Installing Kvalo's Kernel on Alienware 13

To fix the wifi on my laptop, I installed the latest kernel from the following: https://github.com/kvalo/ath The wifi got fixed, however whenever I login in ubuntu the computer freezes after a short ...
0
votes
0answers
98 views

Computer crashing on startup after updating kernel — login screen flashes on and off

After auto-updating the kernel on my new laptop (Dell Lattitude E5450, 64 bit), my computer crashes at startup. Once I get to the login screen, the monitor flashes on and off. If I reboot into the ...