Created attachment 73830 [details]
dmesg output - first bootup

I am running Debian wheezy and I have found that, with the nouveau driver
loaded, suspend/resume results in a hung system.  Originally, I was using the
proprietary NVidia driver and suspend/resume worked with it.  However, I
switched to the Nouveau driver after I found that the system was unstable with
the NVidia driver while watching videos.  I have made sure that all traces of
the NVidia driver have been removed before reproducing the bug.  Except for
this problem, the Nouveau driver works well -- no more crashes while watching
videos.

I have also confirmed that suspend/resume works after I unload the nouveau
driver.  I use the following commands:

echo 0 > /sys/class/vtconsole/vtcon1/bind
rmmod nouveau
pm-suspend

I have also done a test of suspend/resume with Nouveau loaded after activating
pm_trace (i.e. echo 1 > /sys/power/pm_trace).  I attach a couple of "dmesg"
outputs.  The most interesting lines from the second "dmesg" command from
rebooting after the crash are the following:

[    0.726626] PM: Hibernation image not present or could not be loaded.
[    0.726635] registered taskstats version 1
[    0.727033]   Magic number: 0:56:725
[    0.727036]   hash matches drivers/base/power/main.c:571
[    0.727078] pci 0000:01:00.0: hash matches
[    0.727139] rtc_cmos 00:06: setting system clock to 1996-05-07 08:42:38 UTC
(831458558)

Complete "dmesg" output attached.