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

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2
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1answer
387 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
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 ...
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. ...
5
votes
3answers
15k views

How do I add the mainline kernel PPA?

How can I add the mainline kernel ppa to the synaptic software sources? I have the url: http://kernel.ubuntu.com/~kernel-ppa/mainline/ but I am missing the ppa: line.
2
votes
2answers
2k 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
1answer
4k 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
0answers
65 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 ...
1
vote
2answers
2k 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
4answers
3k 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
733 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
689 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
612 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.
18
votes
7answers
37k 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 ...
14
votes
1answer
1k 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 ...
13
votes
3answers
53k 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
10
votes
4answers
16k 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 ...
31
votes
2answers
10k views

What is kernel panic?

I just completed an OS course. I heard the phrase "kernel panic" a lot. Can you explain What is a kernel panic? Why does it occur? How can I find out that a kernel panic occurred? What effect does ...
30
votes
5answers
21k 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 ...
10
votes
1answer
6k 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 ...
15
votes
3answers
31k 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 ...
11
votes
1answer
976 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
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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?
5
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2answers
16k views

How do I clean or disable the memory cache?

After the system starts, in a few minutes my memory cache fills up and it starts using the swap. Here's a screenshot of /proc/meminfo. However, if I can disable this process / clean the cache once ...
2
votes
3answers
212 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?
14
votes
2answers
3k views

What is an kernel update with “Bump ABI”?

As you can see in the changelog for the Linux kernel, there are update messages like "Bump ABI - Maverick ABI 28". According to the Ubuntu Wiki, ABI is something like a bridge between the kernel ...
11
votes
2answers
4k views

What is kernel configuration?

Running PowerTOP on an Ubuntu 10.10 system, one of the suggestions are Enable the CONFIG_PM_ADVANCED_DEBUG kernel configuration option. This option will allow PowerTOP to collect runtime ...
8
votes
2answers
7k 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

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 ...
4
votes
3answers
7k views

Panic occurred switching to text console in netbook

Yes, I know that there is exactly the same question is asked here, but in my case I would like to provide more information in order to try to solve the problem. Because that question had been asked ...
4
votes
2answers
7k views

Need wired/wireless atheros driver for AR9285 and AR8152

How can I install atheros drivers to my Toshiba laptop (64bit), manually? I need AR9285 wireless adapter, and AR8152(v1.1) wired, fast ethernet. I cannot connect my UberStudent1.0 (linux OS, ...
3
votes
1answer
107 views

What is the technical reason preventing a simple upgrade (non-destructive) from 32 to 64-bit?

I was under the impression that upgrading from 32-bit to 64-bit required a new kernel. This would mean replacing the kernel is all that would be needed. Perhaps drivers and libraries need to be ...
0
votes
5answers
387 views

12.04 LTS - Recent update: Fails to boot with version 3.8.0-37 generic

I'm not sure what happened but last night when the new updates were released and Software center prompt me I installed and rebooted as normal. Everything on my system worked fine until the updates ...
0
votes
3answers
1k views

Ideapad Z580 won't boot kernels above 3.2.0-32

I'm running Ubuntu 64 bit 12.04.1 LTS. I see either a blinking cursor or a black screen if I try to boot all kernels beginning at 3.2.0-33 and later. Safe mode fails for those kernels as well. ...
12
votes
3answers
13k 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 ...
9
votes
1answer
11k 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?
6
votes
3answers
966 views

What's the minimal compatible Linux kernel version required to run Ubuntu?

Why older kernel? For whatever reason out there, you might be forced to run another kernel than the ones provided by Ubuntu. It may even take you back a few years for a kernel that is compatible with ...
5
votes
2answers
14k views

Kernel panics with “Cannot open root device” error, where do I append the “root=” option?

whenever I try to boot with linux kernel 3.0.0.13 (the one installed by the upgrades) I get a Kernel Panic error: VFS: Cannot open root device "sda1" or unknown block (0,0) Please append a ...
4
votes
1answer
376 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 ...
3
votes
1answer
4k views

Is there any way to downgrade or revert an update to the kernel?

Today I installed the linux 3.9 Kernel update (because I heard it would fix sound through HDMI which I no longer have since installing 13.04). After restarted my computer and logging in my screen has ...
3
votes
1answer
4k views

nvidia drivers fail completely after update to 3.5.019

I'm running a duel-screen set-up and need the proprietary drivers because the standard ones won't drive the second screen at full resolution. After updating to 3.5.019, downloading the latest linux ...
3
votes
3answers
3k views

How do I restore an accidentally deleted initrd image?

I accidentally deleted the initrd image on my system. How do I restore it?
2
votes
1answer
690 views

Broadcom wireless 43142 conflict Atheros 8161 in kernel 3.5 (unbuntu 12.10)

I am exactly in the situation of this question. However, my wireless card is a different model: I have a dell vostro 3460 with an Atheros AR8161 Ethernet card and a Broadcom 43142 wireless card. I ...
2
votes
2answers
5k views

Error when I try to compile the kernel 2.6.37

I have downloaded the kernel 2.6.37 from kernel.org. I have tried to compile it but I get an error: $ make menuconfig scripts/kconfig/conf --silentoldconfig Kconfig *** *** Configuration file ...
2
votes
2answers
4k views

Unable to enumerate USB device

My syslog is constantly filled with messages like this: Oct 16 11:48:35 my-laptop kernel: [61470.980078] hub 1-0:1.0: unable to enumerate USB device on port 2 Oct 16 11:48:35 my-laptop kernel: ...
1
vote
1answer
786 views

How to reboot using an updated kernel with kexec?

Is it possible to reload the kernel using kexec after a kernel upgrade without doing a complete reboot? The Ubuntu wiki RapidReboot page explains how to perform that using init.d commads, any fast way ...
0
votes
1answer
6k views

kernel panic - not syncing : attempted to kill init!

yes this problem might have been reported and solved for a lot of people on the Internet but i haven't found anyone who is running their Ubuntu 12.04 from a USB drive. i crashed my hard disk a long ...
6
votes
3answers
2k 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 ...
6
votes
1answer
3k views

What's the best way to update the linux kernel if I have no internet connection?

I currently did a clean install of Ubuntu LTS 10.04 on my new laptop. After the installation, I attempted to do an update of the system only to find out that the 2 most important interfaces (eth0 and ...
6
votes
1answer
2k views

In GNU GRUB, I receive error: no loaded kernel. How do I load a kernel?

Whenever I type in 'boot' I get the error message, "no loaded kernel". How do I boot normally again? grub version 1.98 dual-booting ubuntu and windows