I upgraded to this kernel to build a graphics driver, but I appeared to lose ACPI sleep in the process. I am now back using kernel-2.6.15-1.2054_FC5, where there is no problem. I'm not much bothered about it, so I'll just leave a little log. pnp: Failed to activate device 00:08. pnp: Failed to activate device 00:09. snd-usb-audio 1-1:1.1: no resume for driver snd-usb-audio? snd-usb-audio 1-1:1.2: no resume for driver snd-usb-audio? Some devices failed to suspend Restarting tasks... done PM: Preparing system for mem sleep Stopping tasks: ==================================| snd-usb-audio 1-1:1.2: no suspend for driver snd-usb-audio? snd-usb-audio 1-1:1.1: no suspend for driver snd-usb-audio? pnp: Device 00:07 disabled. NVRM: ACPI: unsupported event: 2 Could not suspend device 0000:01:00.0: error -1 pnp: Device 00:07 activated. pnp: Failed to activate device 00:08. pnp: Failed to activate device 00:09. snd-usb-audio 1-1:1.1: no resume for driver snd-usb-audio? snd-usb-audio 1-1:1.2: no resume for driver snd-usb-audio? Some devices failed to suspend Restarting tasks... done Send instant messages to your online friends http://uk.messenger.yahoo.com