I don't know how applicable this piece of advice is to this issue, because I am 
using Fedora 11 with the 2.6.29.6-217.2.16.fc11.x86_64 kernel (i.e. on a 64-bit 
install). In any case, I was trying to solve the occasional flickering that I 
was noticing and came across this site: 
http://www.ubuntusolutions.org/2009/02/screen-flickering-with-nvidia-on-ubuntu.html
Specifically, the advice that proved useful was to add the following lines to 
/etc/modprobe.d/options (actually, any file in the /etc/modprobe.d/ directory; 
e.g. I used /etc/modprobe.d/nvidia):

options nvidia NVreg_RegistryDwords='PerfLevelSrc=0x2222'
options nvidia NVreg_Mobile=1

Apparently, the equivalents of these registry values from the Windows
driver are not enabled by default in Fedora (and I suppose not in
Ubuntu, either, because I have never been able to resume successfully
from suspend in Ubuntu or Fedora until now). Perhaps pci=nomsi is also
needed, although I haven't checked if that option is needed. For me,
when both the modprobe lines and the kernel option are active, I can
suspend and resume using the nvidia driver successfully, and access my
disks as well, which I couldn't do before, even with the pci=nomsi
kernel option. I'm just posting this here because it might help some of
the reporters of this bug. I will do more experiments later.

-- 
[Acer, inc. Aspire 4530] suspend/resume failure [non-free: nvidia]
https://bugs.launchpad.net/bugs/359868
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