ubuntu-x-swat team mailing list archive

[srikumar <srikumar108@xxxxxxx>]

Public bug reported:

This is not a bug report but more of feature request.

I cannot use any nvidia driver newer than 185.18.14 on my Sony Vaio
AR520E with Nvidia 8400M GT. The symptoms are, screen flickering,
artifacts, complete system freeze, etc. It turns out that this is a well
known problem with the latest drivers, a lot of people experience it.
The problem is hardware specific, not OS dependent. The fix for is to
turn powermizer off by creating a file /etc/modprobe.d/nvidia.conf with
the following in it:

options nvidia NVreg_RegistryDwords="PerfLevelSrc=0x2222"

Since Karmic boots into graphical desktop by default, any user whose h/w
is affected by this bug will not be able to get even a usable login
prompt after installing the nvidia driver. The user may not even be able
to fix the problem. In light of that, please consider changing the
installer so that the user gets a choice of turning on powermizer with a
warning that it may make the system unusable. There should also be a
boot-time option to disable powermizer, if X does not stat properly. Or
maybe it is better to turn off powermizer by default with a warning that
turning it on may create problems.

Please consider turning the powermizer feature off, or make it optional.

** Affects: nvidia-graphics-drivers-180 (Ubuntu)
     Importance: Undecided
         Status: New

-- 
Please consider turning powermizer OFF
https://bugs.launchpad.net/bugs/456637
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