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

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31
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5answers
22k 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 ...
15
votes
4answers
15k views

How do I add the kernel PPA?

I can get Ubuntu mainline kernels from this kernel PPA - is there a way to add it to my repository list the same as regular Launchpad PPAs?
11
votes
5answers
7k views

How do I debug an overheating problem on a Dell Inspiron 1564?

I have a problem with my Laptop (Dell Inspiron 1564 Core i5 4GB Ram VGA ATI Mobility Radeon HD 4300 running Ubuntu 10.10 32bit). It shuts down abruptly without even a lag in the application I am ...
4
votes
1answer
503 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
2k views

How do Fn keys work?

I like to know how Fn keys work in my laptop. I think a kernel module exist that catch fn key and call some scripts to do something. In my laptop, Fn+f2 switch power of wireless and blue-tooth. this ...
7
votes
1answer
991 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 ...
1
vote
4answers
14k views

Ubuntu 11.10 nvidia module failed to load (no module exists)

I have an ASUS Ul30vt with an intel/nvidia hybrid graphics card. I can get the intel driver to load just fine, but I am struggling to get the nvidia graphics card loaded. I have tried a number of ...
10
votes
2answers
14k views

How to add kernel module parameters?

How to add a kernel module parameter in Ubuntu 11.04? Can I use the /etc/module file? If yes, how?
9
votes
3answers
3k views

Kernel patch that solves battery issues when for ubuntu ? [closed]

http://www.phoronix.com/scan.php?page=news_item&px=MTAxNDM When will this come for ubuntu ? I am getting tired with my 11.10 dieing at little over 50 minutes of battery when at the most extreme ...
7
votes
2answers
3k views

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

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 ...
7
votes
3answers
7k views

How do I install this patched b43 driver?

Recently I purchased a Macbook Pro that has a BCM4331 802.11a/b/g/n WiFi card that does not work with the default kernel. sudo dmidecode -s system-product-name MacBookPro8,2 lspci |grep 4331 ...
6
votes
2answers
21k views

How can I remove new kernel versions after downgrading?

i have some problem. First i upgraded ubuntu to 12.04 and all of packages. But after that i have a lot of problems so i decided to downgrade to 11.10. After i did that i have two kernels 3.2.x and ...
5
votes
3answers
8k views

VirtualBox 4.3 on Ubuntu 13.10 unable to run VM

Like Ubuntu 13.10 VirtualBox Error Kernel driver not installed (rc=-1908) I am also having a problem I keep getting the following error : Trying to register the VirtualBox kernel modules using ...
4
votes
2answers
10k views

Brightness controls stopped working after update on a Samsung QX412-S01AU

Previously on my Samsung QX412-S01AU laptop I had been able to get brightness controls working, see this question: Brightness Hotkeys Only Slightly Work. After a recent automatic update, which ...
3
votes
2answers
3k 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 ...
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 ...
2
votes
2answers
4k views

How to upgrade Kernel Version 3.10 from Ubuntu 13.04

I want to upgrade Kernel. Now my linux kernel is 3.8.0-19-generic. How to upgrade my kernel? i am linux beginner.
2
votes
3answers
2k 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 ...
1
vote
2answers
1k views

How can I load the standard wireless driver after I deinstall ndiswrapper?

since I have some problems with my download speed under ubuntu (see my other question) I installed ndiswrapper to load windows driver for my wifi card. Unfortunatly it didn't worked very well so I ...
8
votes
2answers
8k views

How to remove Kernel/LTS Enablement Stack?

this question regarding the LTS Enablement Stack has actually two parts: I installed Linux 3.5.0-x on Precise 64bit via sudo apt-get install linux-generic-lts-quantal xserver-xorg-lts-quantal . As ...
5
votes
1answer
5k 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 ...
4
votes
2answers
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
votes
2answers
2k 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: ...
2
votes
2answers
11k views

How can I install 3.16 kernel on Ubuntu 14.04

sudo apt-get update && sudo apt-get dist-upgrade do not show the newest kernel. How can I install 3.16 kernel on 14.04?
2
votes
1answer
412 views

Why is lowlatency kernel not being updated in parallel with the generic kernel?

All, Any idea when we'll see updates to the lowlatency version of the Ubuntu 12.04 kernel? It is still stuck at 3.2.0.23 whereas the generic kernel is already several updates ahead of it at a version ...
1
vote
0answers
74 views

Which kernels from Ubuntu 3.5.0 can I remove? [duplicate]

After reading some very helpful information on your forums, I now know how to remove unneeded kernels to free up disk space for updates. Can any of you tell me which of the following I can safely ...
23
votes
0answers
5k views

How to remove old kernel versions automatically? [duplicate]

I know number of ways to remove old kernel versions manually. Is there any way to remove old kernel versions automatically? Automatically, in the sense i don't have to do the same thing each time the ...
7
votes
3answers
10k 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. ...
4
votes
1answer
5k views

Why doesn't Ubuntu detect all of my RAM on 64-bit? [duplicate]

Possible Duplicate: Ubuntu only detects 3.1 GB of ram on Ubuntu 64 bit ISSUE IDENTIFIED: BIOS bug. See dmesg output below. Question is: How to resolve this? Change made since 2.6.32 have ...
3
votes
1answer
6k 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, ...
1
vote
2answers
1k 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 ...
1
vote
1answer
5k views

Update to 3.13 kernel on Ubuntu 13.10 [duplicate]

Since my ATI hybrid graphics card isn't working well under Linux, I wanted to try the new kernel. I don't want to update to 14.04 just yet, because of some missing dependencies and there doesn't seem ...
1
vote
1answer
2k views

Update Manager asking me to update kernel but apt-get upgrade does not?

Just what the title says. The update manager is also asking me to update to Ubuntu 12.10 even when I have the part unchecked that says "Check for new Ubuntu version updates" thing. Is there some way ...
1
vote
1answer
6k views

Bug: unable to handle kernel NULL pointer dereference at

I have recently installed new system on my disc, Ubuntu 12.04. Installation proceeded without problems, I started installing additional software and put data from other discs. I had already two times ...
1
vote
0answers
3k views

pae kernel required for my cpu [duplicate]

Possible Duplicate: How can I install 12.04 on a non-PAE CPU? (error “Kernel requires features not present on the CPU: PAE”) Virtualbox install 12.04 guest: “pae not ...
1
vote
2answers
3k views

Compiling AVLD on 11.04

I'm trying to install AVLD 1.4 on Natty. I've unpacked the files, but when I compile them with make, it fails: make -C /lib/modules/2.6.38-8-generic-pae/build M=/home/jmendeth/Downloads/avld_0.1.4 ...
0
votes
1answer
227 views

Installing Wireless Drivers on Yoga 11s

Yoga 11s wifi card drivers are not pre-installed. I have followed numerous instructions online all of which include downloading the same package, unzipping it, making it, sudo make install. A summary ...
0
votes
4answers
4k views

Installing driver for Atheros AR8131

I am having the same trouble as others getting my Atheros AR8131 Ethernet card recognised by Ubuntu 12.10 on my new HP Pavillion P7-1449 PC. I found the same question where the answer suggested the ...
0
votes
2answers
890 views

Trouble installing Ubuntu with USB on laptop

I have created a bootable USB stick using Universal USB Installer 1.9.0.9 and tried to boot from my USB on a laptop with a clean hard drive. I keep getting the message Could not find kernel image: ...
0
votes
0answers
690 views

Wifi disabled for Intel Centrino Wireless-N 1000 Intel in 12.04 [duplicate]

Possible Duplicate: Wifi for Centrino Wireless-N 1000 Intel Corporation (HP pavillion dm4 - 2070us) is not working Laptop model - HP- dm4 - 2070. I had faced the same problem for wireless ...
0
votes
1answer
683 views

My Lenovo S12 laptop (Intel atom) is taking a very, very long time to boot. Can I fix this?

Basically it will not boot without holding down the power key. It has taken as long as 10 minutes.
29
votes
9answers
58k views

Error: kernel headers not found. (But they are in place)

I'm trying to install the Guest Additions in VirtualBox 4.04. Host OS is Ubuntu desktop 11.04 64bit, guest OS is Ubuntu server 11.10 64bit. $ sudo ./VBoxLinuxAdditions.run After some output this ...
23
votes
4answers
94k views

How do I install kernel header files?

i want to write a device driver but not able to find the header file can someone please help me find them?Also if someone can point out some important site links that would be really appreciated
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 ...
12
votes
5answers
23k views

How to enable the Radeon dynamic power management feature?

So recently, the RC's of Linux Kernel 3.11 were released. As you may know, this new kernel comes with dynamic power management for users of the open source Radeon driver. Since I have power management ...
26
votes
4answers
48k views

Why to choose low latency kernel over generic or realtime ones?

After installing Ubuntu Studio 12.04, I found that it uses a low latency kernel. I searched why and how to change back to realtime or generic ones. But, looks like this part of Linux hasn't been ...
25
votes
3answers
2k views

What are the differences between the Ubuntu shipped kernel and the upstream kernel?

What are the differences in feature set between the main Linux kernel and the kernel being used by Ubuntu? Why is Ubuntu branched off of the main kernel instead of using the main kernel directly?
10
votes
1answer
8k views

Is there a way to disable kernel updates?

I run a more recent kernel (2.6.34) than the ones supplied with the Update Manager. I am tired of updates asking me to reboot every week or so and screwing my grub.cfg (this probably deserves it's own ...
7
votes
4answers
4k views

How to automatically update burg after a kernel update

After every kernel update I have to run update-burg manually. How do I make it automatic?
2
votes
3answers
231 views

Should I allow kernel updates?

I am using Ubuntu 12.04 and the update manager appears daily with updates. I am ok with other updates but I want to know about Linux Kernel updates: Should I update to new versions, and why?