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Old 05-02-2012, 04:23 AM   #1
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Ubuntu 12.04 very unstable after upgrade from 11.10

I've just upgraded from 11.10 to 12.04 using the Update Manager.
Upgrade was fine and completed ok without any errors.

I had no stability issues on 11.10 and very rarely had to reboot from a prompt. However, since upgrading my system to 12.04 it seems very unstable.

Using Firefox or Chromium for any extended period of time the system just freezes completely. Only the mouse pointer continues to work. The entire graphical environment is unresponsive and I have to drop to a prompt to reboot.

In case it was a problem with my profile or config I've disconnected the HDD and booted from the live CD for 12.04. Same problem. After a while the system freezes.

What logs can I look at to investigate?
Can I roll back to 11.10 safely?

Old 05-02-2012, 11:13 PM   #2
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I gave up on Ubuntu a while back - I disavowed the upgrades well before that. There remains one (netbook) Ubuntu in the house - on that I have disabled the upgrade notification. For just this reason. I re-install (clean) that machine usually 2-3 months after Ubuntu releases go GA - once the bugs have been ironed out.

One thing Ubuntu is good at is release co-existance. I always install to new partitions, and share the /home partition. This allows me to re-boot the old release simply by re-booting. The shared /home works fine. Well, it always has in the past - I've not bothered with Precise yet.
This works if you have a separate /home - or can create one prior to the install. In your case you could probably create the /home partition, then simply re-install the old release, specifying the /home mount during partitioning. Accept the same users/passwords, and you should be fine.

Note my sigline ...
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