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[Steve Taylor <556782@xxxxxxxxxxxxxxxxxx>]

Hi all,

I am a completely new Linux user. I moved from a totally broken Win XP
environment to Ubuntu 11.04 a couple of weeks ago, expecting a
streamlined, fast and functional system, with Unity 3D as a fancy GUI.
But from the outset I have had diabolical issues with screen rendering
corruption with the default Unity 3D setup and any apps in Unity 2D or
even in Classic (no effects) which presumably use OpenGL which I wanted
to use, e.g. Scilab (plotting), Oolite “Elite-like” game. The rendering
corruption started right from the first: even the “try out” Ubuntu mode
running from my USB drive during setup was afflicted! “Installing the
whole Natty Ubuntu OS properly from disk will fix the problem,” I
thought at first. I was wrong!

Hardware:
- Dell Dimension 5150 tower PC, 1GB physical RAM
- Dual-core Intel Pentium 4 @ 3GHz
- According to Ubuntu lspci -nn I have: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)] [1002:5b60] 
01:00.1 Display controller [0380]: ATI Technologies Inc RV370 [Radeon X300SE] [1002:5b70] 
-Two monitors: 17” Dell LCD Model E176FPc driven by the 15-pin D-type video output; and an old Apple 19” monitor connected to the DVI output of this video card. Nothing connected to the S-Video socket.
- Have used the monitors “control panel” in Ubuntu to configure an extended desktop across these two monitors, with the Dell as primary to the left, and the Apple to the right.

Have uploaded some screenshots of the rendering issues in Unity3D (a
complete wipeout, totally unusable) and within Unity2D and Classic (no
effects). They remind me so much of a buffer overrun somewhere...

I have no additional proprietary drivers installed, e.g. ATI/Radeon. I
am loathe to install any because, having surfed widely to try and find a
sure-fire resolution to this issue, I have seen so many cases where
advised changes have messed up the user's system in their particular
case that I have stopped short of making changes: I am too naïve a Linux
user to start messing about with it to that level.

Is this thread still running? In the spirit of offering up more evidence
for the nature and scope of the rendering corruption issues out here in
the community, would it be helpful if I described my symptoms in more
detail...? I can describe various reproducible (on my system) instances
if needed...


** Attachment added: "Unity 3D desktop, screengrab encompassing both screens"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/556782/+attachment/2423966/+files/U3D%2005%20Screenshot.png

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https://bugs.launchpad.net/bugs/556782

Title:
  [rs690m] Graphics corruption with ati x1200

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