Ubuntu
update-manager package

How to Rollback Kernel Update?

Asked by TheZorch

An update via was available in the updated manager. It included an update to generic kernel 2.6.38.11.26.

After installing the update networking is no longer functioning properly. I am using an Acer Aspire 4520 laptop. Previous both Ethernet and wireless were both functioning normally. After the update wireless is no longer functioning.

In the network manager Wireless Networking is a selectable option, but the options for selecting a network are grayed out.
Ethernet does function, but takes about 4-5 minutes for it to activate after booting to the desktop. Before the update both Ethernet and Wireless were working properly.

My Acer Aspire 4520 has an onboard Nvidia network adapter and Atheros wireless adapter. As stated before, they were both working before installing the update in the Update Manager.

How can I get wireless working again? Or, how can I roll back to the previous kernel?

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enubuntu (mr.tennents) said : 		#1

At boot press ESC and you will see all the installed kernel. Run a previous version (not the version with 'recovery mode' at the end).

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marcus aurelius (adbiz) said : 		#2

ESC shows you what's beign processed when booting up.

when you boot ubuntu, press down on the SHIFT key. a menu will show with the different kernels installed on your system in order of installation. choose the one prior to the kernel that's giving you trouble.

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marcus aurelius (adbiz) said : 		#3

after you booted up sucessfully, you'll need to go into synaptic pkg manager and do a complete uninstall of the kernel that's giving you trouble, then you'll have to go into the terminal and do a sudo update-grub or your computer will keep booting the bad kernel.

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TheZorch (thezorch) said : 		#4

I might not be the kernel, but something else that came down with that update. The problem occurs with the previous kernels also. Thing is, I don't remember what else came down with it. I think there was a Python update.

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