Uuuh,
running Feisty quite happily, I installed Gutsy on my laptop on a separate partition ( I use the laptop all the time and can take not risks here).
As always, the first thing I tested was Suspend to disk. It did not work (screen went black in a second. I had to switch off power finally). I then decided to take a deeper look later. When I clicked reboot, again: Screen black. I had to switch off.
Today I found time to test again. At first, I updated the box. Then I started testing. I soon found, that simply logging off sometimes made the box freeze. I logged in via ssh to get more information, but as the ssh session also froze, I decided to start netconsole to get any kernel messages. I activated magic key and then switched from X to console, as I wanted to play with Alt-SysRq.
Oops: The box immediately froze !!!
Luckily this sems to be reproducable, so I filed a bug:
https://bugs.launchpad.net/ubuntu/+source/linux-meta/+bug/173425
Tags: Gutsy, hard freeze
