Kernel 3.4RC4

[aybesea]

Prior to the release, SteveRiley was helping me out with some advice on Kernel3.4RC4 and trying it to see if it might fix my Intel Wifi issue. I went to install the headers and kernel, but it says that the headers are for i386 (the ones in the x86_64 pkg) and that I am missing dependencies. There is also an all package, but it is 11Mbs and seems to include an awfully lot of architecture that I don't need.

Any advice?

[SteveRiley]

Double-check that you have the correct three, and only these three, files downloaded.

32-bit
linux-headers-3.4.0-030400rc4_3.4.0-030400rc4.201204230908_all.deb
linux-headers-3.4.0-030400rc4-generic-pae_3.4.0-030400rc4.201204230908_i386.deb
linux-image-3.4.0-030400rc4-generic-pae_3.4.0-030400rc4.201204230908_i386.deb

64-bit
linux-headers-3.4.0-030400rc4_3.4.0-030400rc4.201204230908_all.deb
linux-headers-3.4.0-030400rc4-generic_3.4.0-030400rc4.201204230908_amd64.deb
linux-image-3.4.0-030400rc4-generic_3.4.0-030400rc4.201204230908_amd64.deb

Note that the all header file is the only thing in common, and is required; the other header file and the kernel image are architecture-dependent.

Once downloaded, install all three at once:

sudo dpkg -i linux-*.deb

Did you perhaps download both the 32-bit and the 64-bit header packages? I'm unsure how the install scripts inside the packages will behave if dpkg sees both.

[Snowhog]

Are there any advantages to using the 3.4-rc kernel at this point? I'm happily using the latest 3.2.0-24 kernel without any issues on 12.04. I'm of the understanding that even when the kernel is released as 'final', that it won't be made available 'as a standard kernel upgrade' for those of us using 12.04. Would that be correct?

[SteveRiley]

Are there any advantages to using the 3.4-rc kernel at this point?

Information...

• KernelNewbies has a good list of changes in 3.3.
• Phoronix has a collection of articles covering the development of 3.4.

My reasons for moving up to 3.4 include...

• better UEFI support (since keeping up with this of interest to me)
• Open vSwitch support (a portion of my job is to remain abreast of all forms of virtualization development)
• other network- and stack-related improvements
• better support for Intel Sandy Bridge graphics
• improvements in power management

I'm of the understanding that even when the kernel is released as 'final', that it won't be made available 'as a standard kernel upgrade' for those of us using 12.04. Would that be correct?

LTS releases will introduce new kernel revs. Take a look at http://packages.ubuntu.com/search?ke...ll&section=all

• Hardy: 2.6.24
• Lucid: 2.6.32, 2.6.35, 2.6.38, 3.0.0
• Maverick: 2.6.35
• Natty: 2.6.38
• Oneiric: 3.0.0
• Precise: 3.2.0

If the pattern holds, I suspect we'll see 3.4 appear in Precise over time.

[aybesea]

Okay... I tried this, but it broke the nVidia card even more than before... now the card wouldn't do any resolutions over 800x600. More importantly, it didn't fix my wifi woes. So I backed out the kernel. Thanks for the try. I'll post another thread about the original wifi issue.

[Guest]

Information...
better support for Intel Sandy Bridge graphics

Can you use Sandy Bridge graphics and a discreet video card at the same time with this update?

[SteveRiley]

Can you use Sandy Bridge graphics and a discreet video card at the same time with this update?

More often, this requires software written to work with the other card to handle the switching. The Bumblebee Project is making good progress on getting nVidia Optimus to work. Not sure what's available on the AMD side.