The Linux kernel is a monolithic kernel originally developed by Linus Torvalds who still directs its development to this day. The latest stable kernel version is 3.9.1
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How do I to remove or hide old kernel versions, to clean up the boot menu?
Every time I install a new Linux kernel, it gets left in the grub config, making the boot menu longer each time.
I know I can manually search through the installed packages and remove them, but ...
58
votes
6answers
9k views
How do we get this magic performance-boosting 200 line patch?
I read today on Phoronix that there is a 200 line patch to the Linux Kernel which dramatically improves desktop responsiveness.
How can Ubuntu users get this in a way that's supported?
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votes
9answers
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Does Ubuntu support USB 3.0?
I have a Western Digital My Book 3.0 - 1 TB USB 3.0 Desktop External Hard Drive, and I wanted to know if it would work on Ubuntu 10.10 Maverick Meerkat.
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votes
6answers
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How can I install on a non-PAE CPU? (error “Kernel requires features not present on the CPU: PAE”)
On my old Toshiba Tecra A2 laptop, I tried installing Ubuntu 12.04 Beta 2.
After burning it to a CD, I tried booting from the CD and got the message:
This kernel requires the following features not ...
36
votes
2answers
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Does the removal of i386 from the kernel mean Ubuntu is dropping 32 bit support?
I saw recently that the i386 CPU is not going to be supported in the Linux Kernel 3.8
so does that mean that Ubuntu will only be available in the coming years in 64-bit?
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votes
4answers
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Can I install Linux kernel 3.4 in Ubuntu and Kubuntu 12.04?
Can we install the latest kernel 3.4 in Kubuntu or Ubuntu 12.04 LTS? If not then please clarify the reason.
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votes
5answers
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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 ...
29
votes
5answers
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Why is swap being used even though I have plenty of free RAM?
I thought the whole essence of swap was to act as a temporary storage safety net when RAM was full but my swap partition is constantly being used even though I sometimes have as much as 3GB free RAM. ...
28
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1answer
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How do I install and use flashcache/bcache to cache HDD to SSD?
I want to know if there is anyone who has tried installing and running their kernel built with flashcache or bcache for SSD caching?
How did you manage to do it?
26
votes
2answers
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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 ...
25
votes
0answers
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How to remove the unwanted entries from the boot menu? [duplicate]
Possible Duplicate:
Is there a way to remove/hide old kernel versions?
When my system boots up, a big list of some 6 options are shown other than the Windows OS option.
They are like :
...
24
votes
6answers
1k views
24
votes
3answers
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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?
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votes
8answers
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What is the path to the kernel headers so I can install vmware?
I installed the VMware bundle on my Ubuntu 11.04 successfully but when I open it it gives me this window
and I don't know the path to this C headers.
23
votes
5answers
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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?
23
votes
1answer
9k views
Is “laptop-mode-tools” still relevant for 12.04 and the 3.x kernels?
I'm using Ubuntu 12.04 x64 and trying to choose power management software. Laptop-mode-tools have a lot of features, but the only reason why I'm worry about is that it's manual and config files are ...
20
votes
5answers
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VirtualBox doesn't load after 12.04 upgrade
After upgrading from 11.10 to 12.04, virtual box stopped working.
I've run the following to try to fix it:
sudo aptitude update
sudo aptitude install dkms
sudo /etc/init.d/vboxdrv setup
but when ...
19
votes
4answers
888 views
What has Ubuntu contributed to the Linux Kernel?
This question is similar to this one: What unique enhancements and features has Ubuntu brought to the Linux Community but in this case it is directed towards what has Ubuntu contributed to the ...
18
votes
3answers
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Can I update the kernel of my 10.04 LTS to the latest kernel?
I want to update the kernel version of my current 10.04 LTS to at least 2.6.37 (because the drivers for my eth0 and wlan0 interfaces are included in the said kernel).
If it is possible, how do I do ...
18
votes
1answer
3k views
How to remove old kernel versions automatically?
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 ...
17
votes
3answers
35k views
How to remove kernels from previous release? [duplicate]
Possible Duplicate:
Is there a way to remove/hide old kernel versions?
I upgraded my Ubuntu 11.10 system to 12.04 using a CD. After upgrading I try to remove old version kernels that ...
17
votes
3answers
3k views
What's the meaning of “-pae” at the end of kernel version?
Last time I installed Ubuntu there was a "-pae" at the end of the kernel version in the boot screen. Now that I've reinstalled Ubuntu from the same disk instead of "-pae" there is a "-generic" at the ...
17
votes
2answers
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What's the fairest way to monitor total CPU time - per user?
On a multi user system, I want to measure each user's CPU usage in seconds of cpu time. For the purpose of this measurement, I assume that if a PID belongs to a user, this user is causing the CPU time ...
16
votes
3answers
10k views
How do I add a kernel boot parameter?
I need to add the boot parameter foo=bar to my kernel. How can I do this once for testing, and permanently if testing was a success?
16
votes
1answer
2k views
Will the new open source Broadcom drivers be available in the current LTS release?
I just found out that Broadcom has released a set of open source drivers for their wireless cards. I know that the Ubuntu kernel team keeps a package of backported drivers for LTS 10.04.
Is the ...
16
votes
3answers
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What does the kernel boot parameter “set acpi_osi=Linux” do?
I am facing an issue with brightness control in my laptop which has Intel HD graphics. So when I searched for a fix I found that a common suggestion is to edit the GRUB file line,
...
15
votes
3answers
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How to restore a system after accidentally removing all kernels?
I was trying to delete old kernels, but I must have deleted all of the kernels on my Ubuntu 11.04 laptop. Is there any way to fix this via USB boot or mounting hard drive on another system?
15
votes
1answer
1k views
Quantal backported kernel in 12.04.2? What's going on there?
I'm sure that I'm not the first and/or only one to notice that 12.04.2, released earlier this year, installs by default a backported 3.5 kernel from the Quantal (12.10) release.
I'm surprised to see ...
15
votes
1answer
5k views
What is the linux-image-extra package for and do I need it?
Good day everyone, I occasionally update my kernel from this web site
http://kernel.ubuntu.com/~kernel-ppa/mainline/
I have been always downloading 3 deb files for installing
linux header all, linux ...
15
votes
4answers
9k views
Is it possible to use a 2.6.38 kernel with 10.10?
I have simple question. Is it possible to use new 2.6.38 kernel with Ubuntu 10.10? Does there exists some PPA or you need to compile?
14
votes
3answers
3k views
How can I determine the version of the running kernel?
How can I determine the version of the running kernel?
14
votes
5answers
1k views
Is it safe to delete the old kernels from menu.lst?
When the computer starts, GRUB shows a long list of previous kernels in addition to the usual stuff, e.g.
Ubuntu 10.10, kernel 2.6.35-23-generic
Ubuntu 10.10, kernel 2.6.35-23-generic (recovery mode)
...
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 ...
14
votes
3answers
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How can I upgrade the Ubuntu 12.04.2 kernel to 3.5.0-23?
I just installed Ubuntu 12.04.2 64-bit on my desktop PC and I see the kernel in System Monitor is 3.5.0-23 but in Ubuntu 12.04.2 in my laptop the kernel is 3.2.0-38.
I have already tried to run the ...
13
votes
2answers
2k 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 ...
13
votes
2answers
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How to force installation of kernel updates when using apt-get upgrade?
To update my server I use apt-get upgrade.
But when there are kernel updates I always need to do apt-get install linux-.... because apt-get update does not install them.
Is there a way I can tell it ...
13
votes
1answer
1k views
Is the BFS Scheduler better than Completely Fair Scheduler for desktop computing?
What are the advantages of bfs over cfs and are there any benchmarks to see if there are any real performance gains?
12
votes
6answers
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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 ...
12
votes
3answers
667 views
My hardware needs a module to be blacklisted to work, how can I get this fix shipped?
I have an Acer Timeline 1830T. When I install 10.10 and 11.04 it needs to have the acer-wmi module blacklisted for wireless to work.
I think I need to file a bug on the linux kernel but I am not ...
12
votes
5answers
5k views
Where can I find the source code for the Ubuntu Kernel?
I'd like to build my own copy of the Ubuntu kernel. Where can I get the source code?
12
votes
4answers
19k views
How can I install a realtime kernel?
I have read a lot of threads with similar questions, but after reading the answers, I am very confused. I have found in them lots of url's with repositories but people discusses about which ...
12
votes
3answers
3k views
Why is 12.04 removing the -server kernel flavour?
Ubuntu is removing -server flavour, as specified on release notes of 12.04:
...
12
votes
1answer
18k views
How to downgrade the Kernel on 11.10
Because of the high power usage I'd like to downgrade my kernel in Ubuntu 11.10 to the version used in 10.10 or 11.04. How can I do that and won't it cause any problems?
12
votes
2answers
2k 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 ...
12
votes
1answer
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Why won't USB 3.0 external hard drive run at USB 3.0 speeds?
I recently purchased a PCI Express x1 USB 3.0 controller card (containing the NEC USB 3.0 controller) with the intent of using a USB 3.0 external hard drive with my Linux box. I installed the card in ...
12
votes
1answer
190 views
How to identify the module supposed to claim a device by vendor/product ID only?
Suppose I know the numerical product/vendor IDs of hardware I don't have here and I want to know if there's support for me in the kernel, I can do this (USB bluetooth receiver example):
modinfo btusb
...
11
votes
3answers
459 views
Why is my boot menu getting longer?
This question is going to be little incomplete but I am sure you will guess what my problem is. So 2 days back When I restarted my machine I got 7 options on the Boot Screen instead of 5. Earlier ...
11
votes
3answers
5k 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 ...
11
votes
1answer
1k views
Block devices sda, sdb, sdc. What comes after sdz?
My block devices are named sda, sdb and so on.
What happens when I get to sdz? Is the next one going to be called sdaa?
11
votes
4answers
7k 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?
