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

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4
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4answers
821 views

Boot partition full, failing to delete old kernels. Broken packages

Sorry for asking about what is probably really simple, but I've been Googling about for a week now and I've tried a lot of stuff without success. To start off, I get a pop-up every time I boot saying ...
4
votes
2answers
8k views

Kernel downgrade after update broke my system

I need to downgrade from 3.8.0-33 to version -29. After booting the latest kernel I'm greeted by a black screen. How do I keep this version permanently? Output of dpkg -l linux-image* Gewünscht=...
1
vote
1answer
360 views

How to upgrade or downgrade the Kernel in Ubuntu (to any stable or testing release)

When I report a bug I may be asked to "try out the latest upstream Kernel", how do I do that? I see a lot of version specific answers to this question here on ask ubuntu, what are the general ...
10
votes
0answers
10k views

How to “clean” previous kernels after update? [duplicate]

Possible Duplicate: How do I to remove or hide old kernel versions, to clean up the boot menu? I know this topic was brought up many times but I didn't really found an answer that would ...
8
votes
6answers
15k views

How can I upgrade kernel to 3.1?

The Ubuntu kernel PPA doesn't have kernel 3.1. Is there any other guaranteed way to upgrade because I don't want to reinstall Ubuntu again.
5
votes
0answers
1k views

Remove linux version 3.19.31 [duplicate]

My system was just updated with linux image 3.19.31. When it was rebooted, the system hang at the login screen and did nothing. How can I remove this image? It has a major bug in it.
2
votes
2answers
2k views

Installed 14.04 on a non-PAE (Pentium-M), but now I can't update (“This kernel does not support a non-PAE CPU.”)

Here is what I'm looking at. This isn't my computer. I repair PC's and I had an end user with this low powered laptop running XP so I decided to let him try out lubuntu. The install went smoothly with ...
2
votes
2answers
7k views

How do I get my BCM43228 card working in mainline kernel 3.4 or higher?

I followed https://wiki.ubuntu.com/Kernel/MainlineBuilds to install kernel 3.4 and 3.5 from debs. Unfortunately after booting I can't connect to the internet cause I have problems with my network ...
1
vote
1answer
2k views

I get two kernel updates, one for Generic and one for Generic-PAE

I am using Ubuntu 11.10 32 bit on notebook core 2 duo, 4GiB RAM. In order Ubuntu to detect and use more than 3GiB RAM, I apt-get PAE Kernel. The problem comes when there were two update of kernel, ...
0
votes
2answers
348 views

How to Install Linux Kernel 4.6 in Ubuntu 16.04?

I do but get dependency errors which I do not understand wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety/linux-headers-4.6.0-040600_4.6.0-040600.201605151930_all.deb sudo dpkg -i *....
23
votes
2answers
17k views

What is the 'ptrace_scope' workaround for Wine programs and are there any risks?

To run certain Windows programs in WINE you need to this workaround: echo 0|sudo tee /proc/sys/kernel/yama/ptrace_scope According to the support websites, this is due to a bug in the Ubuntu kernel ...
18
votes
2answers
16k views

Hardware Enablement Stack (HWE) out of support

From yesterday my update manager gives me this message: Your current Hardware Enablement Stack (HWE) is going out of support on 07/08/2014. After this date security updates for critical parts (...
28
votes
5answers
21k views

Will Linux Kernel 3.5 be coming to 12.04?

I'm wondering if Kernel 3.5 or 3.6 will be available for Ubuntu 12.04 when the Kernel is officially released?
26
votes
5answers
204k views

Kernel requires an x86-64 CPU, but only detected an i686 CPU. How can I install Lubuntu/Ubuntu?

I'm trying to install Lubuntu on my laptop (sorta old 2005). [Laptop stats: Intel® Celeron® CPU 410 @ 1.46 GHz 1.47GHz, 448 MB of RAM] I press Install and this message appears: This kernel requires ...
22
votes
2answers
8k views

Compile 32bit kernel on 64bit machine

I'm trying to compile a kernel for a 32bit single-core Intel Atom machine. Needless to say, the compile is taking inordinate amounts of time. It's been going for 2 hours and it's still only halfway ...
15
votes
1answer
2k views

Is there ongoing work in the kernel team to improve battery life under linux?

I have read in some forums that the kernel team is working on improving battery life and energy efficiency in Linux. Unfortunately our community really lags behind Windows and Mac in that regard. I ...
46
votes
1answer
2k views

What is Ubuntu's policy on keeping old kernels

I've just run out of disk space on /. Looking into the situation I realised that since first installing 12.04, Ubuntu has upgraded the kernel ~23 times and has kept every old kernel, binaries and ...
47
votes
4answers
47k views

How can I determine the version of the running kernel?

How can I determine the version of the running kernel?
35
votes
5answers
14k views

Why doesn't apt-get autoremove remove my old kernels?

My boot partition is on a SSD, so it doesn't have room for more than about 8 installed kernel versions, and eventually some kernel update will fail to install because my boot partition is full of old ...
33
votes
5answers
23k views

Does Ubuntu have support for the TRIM command for use with SSD?

SSD drives need to be "cleared/reset" after the drive fills up to maintain performance. This is done through the TRIM command for new SSD drives. Does Ubuntu support the TRIM command (through hdparm ...
14
votes
2answers
23k views

How do I build a single in-tree kernel module?

The linux-source-... has a module which is disabled in the config /boot/config-3.4-trunk-686-pae so that it is not part of linux-image-... (This is on Debian, but the solution should be the same for ...
15
votes
2answers
7k views

Why are there so many “linux-” kernel packages on my machine, and what do they all do? [duplicate]

In my usage of Ubuntu, I have noticed a baffling array of different Linux kernel packages. Some of them are listed below: linux-generic linux-headers-generic linux-headers-generic-pae linux-headers-...
8
votes
3answers
32k views

How to change default scaling governor back to ondemand

After playing with GRUB profiling and installing preload, default scaling governor suddenly becomes 'performance' not 'ondemand'. I tried to enable /etc/init.d/ondemand service, but nothing changes - ...
5
votes
1answer
1k views

laptop suspend broken after latest kernel update

I ran a software update (Ubuntu 14.04) on my laptop over the weekend, which included an update from kernel 3.13.0-24 to 3.13.0-27, among other things. Today i had to take my laptop to work, so closed ...
13
votes
1answer
7k views

nVidia driver reset after each kernel update

I am using the official nVidia driver because my card (GeForce 750 Ti) isn't yet supported by the Ubuntu one. Every time the kernel updates, my system breaks. I've formatted my system two-three times ...
10
votes
5answers
10k views

Bash one-liner to delete only old kernels

I've seen lots of threads on how to free space on the /boot partition and that is my objective as well. However, I'm only interested in deleting old kernels and not each one of them but the current ...
13
votes
3answers
6k views

Will final version of 12.04 use the power management changes found in kernel 3.3

I have seen in some version of Ubuntu that instead of making a huge change to update to the latest kernel, they take some of the good stuff out of it, for the sake of stability and put it on a ...
7
votes
1answer
1k views

Linux kernel regression on power usage

Webupd8 reported this power management fix for the 2.6.38 Linux kernel regression: Add the following to the boot grub line "pcie_aspm=force" My question - how does this suggested fix differ from ...
5
votes
2answers
5k views

Cannot adjust brightness after sleep

I have a Toshiba Satellite R830 laptop with Ubuntu 12.04.1 64 bit. The Fn + F6 and Fn + F7 buttons adjust brightness until I put my laptop on sleep. On wakeup they don't work any longer. Is there a ...
1
vote
3answers
3k views

New laptop (Skylake) cannot boot Xubuntu even with boot parameters

I recently bought a new laptop and I would love to install Xubuntu 15.10 next to the current Windows 10 installation. The laptop I bought is a the ASUS ROG GL552VW-CN104T. The CPU of this laptop is ...
17
votes
3answers
22k views

How to kill the process that 'sudo kill -9' can't kill without reboot?

I have tried to kill the process: sam@sam-desktop:~$ ps -aux|grep sda Warning: bad ps syntax, perhaps a bogus '-'? See http://procps.sf.net/faq.html root 2898 0.0 0.0 0 0 ?...
8
votes
2answers
12k views

what kernel version comes with ubuntu 10.04.1?

Could you tell me the version number of the 10.04.1 kernel?
7
votes
2answers
2k views

Laptop immediately suspends when going onto battery power

I've got an MSI Wind, model U100 that's been running Ubuntu without trouble for a long while. After upgrading to 10.04 a few months ago, I've had this strange problem. As soon as I unplug the laptop ...
6
votes
2answers
3k views

How does 'apt' decide how many old kernels to keep?

I'm managing a couple of servers for core services (NTP, DNS, etc) and it just occured to me that one of the servers seems to keep the 3 latest kernels, instead of 2 on the others : nul@quark:~$ sudo ...
5
votes
2answers
10k views

kernel version 3.13 even I have ubuntu 14.04.2

I am using 14.04.2 probably it was upgraded over 14.04.1 but my kernel version seems still 3.13. According to 14.04.2 it seems that 3.16. I did not understand why it was not upgraded automatically......
4
votes
1answer
4k views

How do I find the current stable kernel (HWE) for 14.04.2?

This question is related to this one also. So I want to understand how do I find the last stable kernel for Ubuntu 14.04.2? Because with point release 2 it still confuses me. This is my current kernel:...
3
votes
3answers
3k views

Getting the alternative to the 200-Line Linux Kernel patch to work

Apparently, there is a comparable alternative to the 200-line kernel patch that involves no kernel upgrade. It is presented here and discussed here. However, I am not sure if webupd8's solution (...
3
votes
2answers
5k views

Installing 4.4 rc7 kernel yields i915 module not available [closed]

Dears, I installed the 4.4 rc7 kernel on my ubuntu 15.10 following this page github.com/awesomebytes/ubuntu14_dell_xps13_9350 just replacing code for rc6 with code for rc7. when installing I got an ...
2
votes
3answers
3k views

Ubuntu doesn't boot after kernel update

After the update to latest kernel (2.6.32-31-generic), when I start my PC, all I get is the grub2 prompt. I don't get any errors, it simple wont boot. I tried this https://help.ubuntu.com/community/...
4
votes
3answers
48k views

12.04 won't boot from Live CD or USB

My laptop (the only PC left in my home to install Ubuntu 12.04 now that it's out) is not booting from Live CD or USB. I get past the screen with the little person in the circle. but right after that, ...
4
votes
3answers
7k 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 3.2.0-32-...
4
votes
1answer
474 views

I was told on Launchpad to test a mainline Kernel. How do I do that (with NVIDIA drivers)?

I am coming from Bug # 868950 on launchpad, a kernel related problem. To analyse the problem a bit deeper and see where it comes from, I was told to try out a mainline kernel to see if the problem ...
4
votes
2answers
3k views

On 14.04, my kernel version is 3.11.0-18?

After upgrading to 14.04, my kernel is not upgraded! it's like before: Linux Boxi 3.11.0-18-generic #32-Ubuntu SMP Tue Feb 18 21:11:14 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Here's what I did: ...
3
votes
2answers
19k views

Reinstall latest kernel?

I did something silly with a build/modprobe/make while running on my latest installed kernel. Now that kernel will not boot. I am currently running on a previous kernel. How can I clean this up? I ...
10
votes
3answers
6k views

Where is the changelog for Ubuntu kernels?

Where can I find the changelog between versions of the kernel released for Ubuntu 10.04? Note that I need to find the changelog for 10.04 from an 11.04 system, so if I have to, I can run a VM for ...
8
votes
2answers
403 views

Why not include something like Ksplice so there is no need to reboot after updating?

Ksplice is an amazing software (or whatever it is). It changes the way kernel updates work: Instead of rebooting after an update, it patches memory, so you don't need to do anything.
7
votes
3answers
11k views

Are the Ralink RT3090 drivers incompatible with Ubuntu 10.10?

Ralink Technology publishes their drivers in source code form on their website here. When complied with make and make install in 10.04, the drivers worked well in 32 and 64 bit versions of Lucid. ...
5
votes
1answer
4k views

Roll back kernel

I recently upgraded my kernel version to 3.19.3 and most of the stuff is not working (eg. Wireless, installing b43 doesn't help too, fglrx etc.) which seemed to work beautifully before , how can I ...
3
votes
1answer
144 views

Intermittent video glitches - Ubuntu 14.04

I recently started witnessing small graphics glitches with my Ubuntu 14.04 installation which has been running fine for a while with no graphics issues. The glitches usually happen at most bottom area ...
3
votes
1answer
9k views

How can I change an Atheros wireless NIC region (regulatory domain) in Ubuntu?

There is a CONFIG_ATH_USER_REGD variable in OpenWrt that allows the user to override the default settings of the wireless NIC. Unfortunately grepping the Arch kernel config doesn't seem to have that, ...