Hi,
I recently bought a Zalman ZM-NC2000 to keep my laptop cool (Y560). I'm quite happy with the device but I'm disapointed that I have to manually unplug it or turn the power off for the fans to stop working.
Since it's USB powered, I'm hoping that the fans/cooling can automatically stop when the computer enters sleep mode.
I have the following settings:
Device Manager (Generic USB Root)
- Allow the computer to turn off this device to save power (checked)
Power Options
- USB selective suspend (Enabled)
After much reading about USB, it's my understanding that it's up the BIOS / manufacturer to decide if power is cut to a given USB port when going to sleep.
I understand that is most cases, you still need power to go to the USB to "wake from sleep" using a USB mouse for example.
Ways to solve my problem:
- New BIOS setting
USB Power On (sleep): Both (default), USB1, USB2
- Other USB product
Don't think it exists, but a USB hub that cuts power to devices connected to it when OS enter sleep mode.
Any known hacks so that before entering sleep, I can cut power to a USB port?
Similarly, on resume, restore power to a given USB port?
In summary, I have a USB powered "cooling pad with fans" with a switch that I can turn on & off.
When I put the computer to sleep, the USB port continues to provide power to the "cooling pad fans".
Even worse, if I unplug the AC adapter while the computer is in sleep mode, the "cooling pad fans" continue to operate
and drain the battery.
Other people with ~ the same issue:
In the last case, a PCI to USB expansion card works for a desktop but not for a laptop.
Ultimately, is this a problem with the Zalman ZM-NC2000 which should allow itself to turn off when entering sleep mode?
Should I blame the Y560 for not having USB port with no power during sleep? Any lenovo laptops with that feature?
Thanks!
