I've had a couple of problems recently that I'm wondering if anyone else with a flashed Radeon 4890 has experienced. First of all, I've had the 4890 for months, and it works fine otherwise and none of these problems are present on the Windows side.
1. If I leave it by itself, it will never sleep. The monitor won't even dim. If I choose Sleep from the
menu, the screen goes black as expected but then it locks up. I can't wake it up and have to hold power to shut down. If I choose Lock Screen from the keychain app menubar icon, absolutely nothing happens (if you don't have it, you can enable this helpful icon by opening Keychain Access and going into Preferences).
2. Full-screen flash is really jerky and slow. I've fixed that somewhat by setting Flash to use not use hardware acceleration. It's still a little jerky, but much much better than it was. Still almost worth booting into Windows to watch any sort of Flash-based video (Hulu, Netflix, YouTube, etc.).
3. Whenever I try to take a screenshot, it doesn't save the file anywhere. If I try to use Grab.app, the resulting picture is completely white. This happens with screen, window, and selection modes.
Possibly unrelated issue that's being going on for a long time: my Mac Pro periodically freezes if I leave it alone all day. As in, I never see it crash, but I will frequently come home from work or something to find it in this state. It's not totally frozen, I can still move the cursor and switch applications, but if I try to quit apps or open new apps, I get the beachball and it will be completely dead within 30 seconds or so. The only reason I think this may be related is because it never crashes while I'm using it, which leads me to think it happens when it tries to sleep or something.
Oh, and yes it happens even if I boot in safe mode. And I've tried resetting the SMC.
Any help? Thanks
1. If I leave it by itself, it will never sleep. The monitor won't even dim. If I choose Sleep from the

2. Full-screen flash is really jerky and slow. I've fixed that somewhat by setting Flash to use not use hardware acceleration. It's still a little jerky, but much much better than it was. Still almost worth booting into Windows to watch any sort of Flash-based video (Hulu, Netflix, YouTube, etc.).
3. Whenever I try to take a screenshot, it doesn't save the file anywhere. If I try to use Grab.app, the resulting picture is completely white. This happens with screen, window, and selection modes.
Possibly unrelated issue that's being going on for a long time: my Mac Pro periodically freezes if I leave it alone all day. As in, I never see it crash, but I will frequently come home from work or something to find it in this state. It's not totally frozen, I can still move the cursor and switch applications, but if I try to quit apps or open new apps, I get the beachball and it will be completely dead within 30 seconds or so. The only reason I think this may be related is because it never crashes while I'm using it, which leads me to think it happens when it tries to sleep or something.
Oh, and yes it happens even if I boot in safe mode. And I've tried resetting the SMC.
Any help? Thanks