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[Rob van der Linde <829086@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

I am experiencing serious artifacts with the Sandy Bridge graphics card
when doing 3D.  Because we are trying to use this card at work, I have
been testing this card for the last 2 months trying to get it to work
with no luck, so I have done quite a lot of testing towards this and
have found nothing so far that fixes this issue.

This bug seems to happen to certain parts of the 3D scene only, it
happens with our software quite badly which uses Panda 3D (I will attach
a screenshot), but it is not limited to Panda 3D or our software at all
because it also happens with Extreme Tux Racer if you look closely at
the trees when you pause the game (I have taken a screenshot of this
too).

What you will notice is a pattern of dots (artifacts) in certain areas
of the 3D scene, also the dots flicker like snow, which the screenshots
cannot show exactly.  I have marked the areas that have artifacts in
Extreme Tux Racer in red, but in the screenshot of our software it is so
bad I don't even need to mark this.

I am using Ubuntu Natty 32 bit, I have tried the following:

* Intel drivers supplied with natty (2.14) and mesa supplied with natty (7.10.2)
* Cutting edge Intel drivers and mesa 7.12 prerelease from Xorg edgers
* Intel drivers 2.15 from various PPA's with Mesa 7.11 GIT pre-release
* Intel drivers 2.15, Linux 3.0, Mesa 7.11 final release from Michael Kuhn PPA
* Linux 3.0, Mesa 7.11 final from Michael Kuhn PPA + latest Intel 2.16 drivers from Xorg edgers
* Both HD2000 and HD3000 model CPUs do it (both Core i3)
* I have experimented with turning different settings on and off using driconf, but it still happens

I have also tried to install Oneiric Alpha 3 32 bit, but the desktop CD
crashes half way during the install, the alternative CD crashes during
the install when it asks for the language because it doesn't like USB
keyboards, and the server CD also crashes, before it can even start, so
I cannot install Oneiric at this point to test it.

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: intel sandybridge

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https://bugs.launchpad.net/bugs/829086

Title:
  Artifacts in 3D with Sandy Bridge

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