Today, I updated my kernel using the official *.deb file to 2.6.33.3. This may be the easiest way: http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.33.3-lucid/. Since 2.6.33 supports DRM natively, my update was so smoothly.
In the later 2 blogs, I want to learn and write down how to compile kernel from ubuntu source and original kernel source.
I’m now using Ubuntu 10.04 (Lucid Lynx). I want to dig into the kernel. When I check the kernel package in Synaptic, I found the version is 2.6.32-22.33, but currently the mainline kernel version is 2.6.32.13. How could that be?
Then I found the following address: http://kernel.ubuntu.com/~kernel-ppa/info/kernel-version-map.html. There’s a map, and version 2.6.32-22.33 maps to mainline version 2.6.32.11+drm33.2. DRM stands for Direct Rendering Manager. It’s a backport module from 2.6.33 to provide video acceleration.
To further verify the version, I install the linux-source package. In /usr/src/linux-source-2.6.32.tar.bz2!/linux-source-2.6.32/Makefile:
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VERSION = 2 PATCHLEVEL = 6 SUBLEVEL = 32 EXTRAVERSION = .11+drm33.2 |
But it is a modified version. To get the original kernel package, run the command:
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# sudo apt-get source linux-source-2.6.32 |
There files will be downloaded: linux_2.6.32-22.33.dsc, linux_2.6.32.orig.tar.gz, linux_2.6.32-22.33.diff.gz. *.dsc is a signature, *.orig.tar.gz is the original source, *.diff.gz is the patch. In the case of packages made specifically for ubuntu, the last of these is not downloaded and the first usually won’t have “orig” in the name. In /usr/src/linux-source-2.6.32.orig.tar.gz!/linux-source-2.6.32/Makefile:
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VERSION = 2 PATCHLEVEL = 6 SUBLEVEL = 32 EXTRAVERSION = |
And after installed the source, the version number became same as that in the *.deb package.
