Comment 23 for bug 1412602

Hi Tim,

As far as I can tell ATM the only difference in most of these crashes/freezes/screen-corruptions is the frequency with which they occur and the screen color depending on what point during boot and/or operation the "freeze" occurs.

Like this is the pic I included with original bug report:

https://launchpadlibrarian.net/195348138/IMG_4796.JPG

And this is a pic from Ubuntu GNOME Utopic with the amd64 version of 3.16.7-031607-generic (mainline kernel):

https://launchpadlibrarian.net/196872607/IMG_4817.JPG

The frequency of crashes/freezes (or the point at which they occur) is sometimes random with the exact same images. Sometimes it may prevent me from even getting to the live desktop or booting to the desktop of an installed OS. Other times it may not happen until I'm performing some random task on the desktop. Or it may occur at any random point during installation.

It seems to affect Unity, GNOME Shell, and Flashback w/Compiz somewhat more frequently that GNOME Classic and I've not been able to reproduce this bug with the same versions of Lubuntu so I assume it's a "load" or "demand" related issue???

The one exception is 14.04.2 with 3.16.0-31-generic from trusty-proposed which may (or may not) fix this issue but results in an unrelated crash (see comment #19) so I'll check the changelogs and see if there is a tracking bug # to refer to. I'll then file a new bug report ASAP.

But yes, this does appear to be fixed in Vivid w/3.18.0-13-generic. I will be glad to try the 3.18.5-031805-generic mainline kernel in Vivid also if desired.

I should also probably test Utopic again and see if I can find the equivalent of trusty-proposed 3.16.0-31-generic since it really is part of the 14.04.2 LTS HWE for Trusty.