I have a Sony Vaio SA laptop, which includes a dual-video card solution - you can flip a switch to change from the Intel HD 3000 graphics built into the CPU (a "Sandy Bridge" Core i5-2410m) to the discrete ATI Radeon 6630m graphics chip. (You can't use both, however, nor is there a behind-the-scenes switching or hardware multiplexing like nVidia's Optimus or Lucidlogix Vertu.)
Every so often, usually but not always after I resume the machine from sleep, the colors on the built-in screen look extremely washed out, as if someone cranked up the brightness and contrast settings to the maximum. The problem usually goes away after a minute, but it makes things really hard to read and hurts the eyes. I wish I had a picture, but sadly I don't right now.
Although I could be wrong, I don't think this is a problem with the screen or its settings, because it occurs only intermittently. To my knowledge, I have never seen this problem with the discrete Radeon chip, so I'm suspecting something wrong with the Sandy Bridge chip or its driver. A web search suggests that such problems do exist, but the suggestions come from, shall we say, "less reliable" sources.
Am I right to blame the Intel graphics card or driver, or is there some other likely cause?
Here's a snipped and censored copy of the dxdiag.exe diagnostic report, which should hopefully still contain all the useful info.