I am getting occasional display corruption in the lower right area of my display, and occasionally around the mouse pointer.
This seems to occur after relatively graphics-intensive activities such as viewing a movie full-screen, etc.
PC is a Thinkpad T60 wide with 128mb X1400. Running 7.11 currently, installed via Envy. I am not using Compiz.
I'm wondering if this is related to temperature... it's the type of corruption I'd expect from a video core overheating.
ibm-acpi reports the GPU at 56 deg C at idle, which doesn't seem terribly high to me, but the temperature spikes higher when under load playing a video, to 60 C (or higher, 60 C is the limit of the sensor range according to the properties in the Gnome Sensors Applet).
I haven't experimented long enough to see how high it will go. I'll report back the next time the display corrupts and let you know what the temperature spiked to.
Setting "XAANoOffscreenPixmaps" to "true" seems to be a workaround for this, at least for many people. I don't think it's an overheating problem.
Where do I set it? Thanks for the info, by the way!
In my investigations on the temperature issue, it doesn't seem as though atieventsd is throttling the power state of the GPU in the same way as the driver does normally in Windows, leaving the GPU in the high power state all the time. This isn't proper, especially in a laptop where heat and power consumption are a concern. Does anyone have any information on how to configure the behavior of atieventsd?