In looking at dmesg this morning, I noted the following section: [ 853.529553] ACPI Exception (thermal-0538): AE_ERROR, ACPI thermal trip point state changed [ 853.529558] Please send acpidump to linux-acpi@xxxxxxxxxxxxxxx [ 853.529578] [20080926] [ 855.757168] usb 2-2: usbfs: USBDEVFS_CONTROL failed cmd hp rqt 128 rq 6 len 255 ret -110 [ 857.665382] ACPI: Transitioning device [FAN0] to D3 [ 857.665388] ACPI: Unable to turn cooling device [f6c152a0] 'off' [ 860.757203] usb 2-2: usbfs: USBDEVFS_CONTROL failed cmd hp rqt 128 rq 6 len 255 ret -110 [ 866.561178] usb 2-2: usbfs: USBDEVFS_CONTROL failed cmd python rqt 128 rq 6 len 255 ret -110 [ 871.561128] usb 2-2: usbfs: USBDEVFS_CONTROL failed cmd python rqt 128 rq 6 len 255 ret -110 So, in response to the second line quoted above, I'm sending you the following: ~$ acpidump acpi_os_map_memory: cannot open /dev/mem I'm not sure what that means, but I hope it helps. fyi, I was plugging in my usb printer, which wasn't working correctly, which is why I was in dmesg. In case that matters. Grace, Kent Rasmussen -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html