http://bugs.winehq.org/show_bug.cgi?id=19625
--- Comment #6 from DL taedium_vitae@eml.cc 2009-09-19 01:55:43 --- (In reply to comment #5)
I don't see any shadows!! Wine 1.1.29, ATi Radeon HD 3200, fglrx 9.9.
You need the video description patch, plus correct registry entries.Here's the one I use: http://bugs.winehq.org/attachment.cgi?id=20312
And this is the bug report which gives additional details, including what registry entries you need.There's also a newer patch on that page that may or may not work better.Since you use an ATI card, you might want to try that one, since it says it supports the ATI driver.
Also, while I'm at it, I hacked up a patch that reverts the change that causes the shadow flickering bug.I'm no coder, so it's probably not 100% correct, but it seems to work well enough, and doesn't cause any other issues with Oblivion.