Tady dokonce píšou, že to v betě Visty fungovalo dobře a nefunguje to až teď!

Throughout the beta, Deep Sleep in Windows Vista went great. It’s the default option (so long as it’s configured in the BIOS) when you click the shutdown button.2 It would put your computer in a low-power mode that recovered in a matter of 2 or 3 seconds, and didn’t crash! But in the final version of Windows Vista, something is very, very majorly wrong. On 6 of the 8 tested systems,3 recovering Windows Vista from a hibernate or Deep Sleep results in one of the following:

* When recovering from a hibernate: “Cannot find uxtheme.dll” appears whenever you attempt to run (almost) any program. No matter what you do, you can’t even run Task Manager. What’s worse, a restart doesn’t fix it, and because Windows Explorer also fails to launch with this error, you need to boot from the DVD and use System Restore - Safe Mode won’t work!4
* Failure to establish a network connection. Everything looks OK, but you can’t connect to the internet. Your LAN signal will be there, but the internet just doesn’t work. You must restart to fix it.
* Poor performance: though Task Manager will show normal CPU load, some of the drivers (they don’t appear in TaskMan) will attempt to use 100% of the CPU, resulting in a very laggy PC. You need to restart to fix it.
* No DWM. For no reason, DWM just won’t re-appear. This happens on ATi and nVidia, with or without the latest official drivers from the companies themselves. Manually running “dwm.exe” doesn’t work, you need to restart to fix it.
* BSOD on recovery. This is usually caused by the video drivers, and may or may not indicate something wrong with the kernel itself.
* No sound. Vista goes mute. Nothing you can do about it, no way to revive it, you just have to restart and let the re-done sound-stack load-up the way it should.