Ubuntu 11.10 Kernel downgrade to 2.6.35-28

Asked by Zach Patterson on 2011-10-15

Hello, I have a Gateway NV78, my backlight is not working on Ubuntu. After abit of searching I found that downgrading your kernel to 2.6.35-28 can fix this problem, I found it here https://answers.launchpad.net/ubuntu/+source/linux/+question/154675. My question is how do I actually do the downgrade on Ubuntu? It is a fresh install of Ubuntu 11.10

Any help would be great, thanks for taking your time to read this!

Regards.

Question information

Language:
English Edit question
Status:
Solved
For:
Ubuntu linux Edit question
Assignee:
No assignee Edit question
Solved by:
Zach Patterson
Solved:
2011-10-17
Last query:
2011-10-17
Last reply:
2011-10-17

The current kernel from Maverick is 2.6.35-30.60, so you should try that one (it is patched against more recently discovered security vulnerabilities and it is more readily available than the version that was current when the instruction you're working from were written).

You can obtain that kernel at https://launchpad.net/ubuntu/+source/linux -- grab the linux-image-2.6.35-30-generic .deb packages from your architecture (amd64 or i386). It may or may not work in Oneiric, but it's worth trying. If it does not work, then there are other known workarounds for this bug that you can try.

If you have trouble obtaining or installing the kernel, please post a reply and more detailed instructions can be provided.

Hey, thanks for the help. I got the kernel from the site as you suggested, but when I install it and restart it just reverts back to the old kernel, 3.0.0-12-generic. I think I did everything correctly, but probably not. I put and got this back.

[code]

test@test-mac:~/Downloads$ sudo dpkg -i kernel-image-2.6.35-30-generic-di_2.6.35-30.60_i386.udeb
(Reading database ... 128197 files and directories currently installed.)
Preparing to replace kernel-image-2.6.35-30-generic-di 2.6.35-30.60 (using kernel-image-2.6.35-30-generic-di_2.6.35-30.60_i386.udeb) ...
Unpacking replacement kernel-image-2.6.35-30-generic-di ...
Setting up kernel-image-2.6.35-30-generic-di (2.6.35-30.60) ...

[/code]

You should install the .deb package rather than any .udeb package, unless you have specific reason to use the .udeb package.

Then you can select the older kernel in the boot menu by holding down Shift when you boot up.

Hey, thanks I tried the .deb. I got the video on finally by booting up the older kernel 2.6.35-30.60. However, the wifi wouldn't connect after. So I'm going to keep looking for a better fix. Thanks alot for the help!

Your wifi problems is unrelated. I recommend you post a new question about that (https://answers.launchpad.net/ubuntu/+source/gnome-nettool/+addquestion), if you want assistance with it.

FWIW, you likely did not want the -di (disk installer) version.

Also FWIW, I am currently unable to get an 11.10 install to boot with 2.6.35-30.61 -- hangs after choosing.