On Thu, Jan 22, 2009 at 7:58 AM, Eric Martin <freak4u...@gmail.com> wrote: > Paul Hartman wrote: >> On Tue, Jan 20, 2009 at 8:06 PM, Eric Martin <freak4u...@gmail.com> wrote: >>> Paul Hartman wrote: >>>> Hi, >>>> >>>> As the subject line says, powertop constantly tells me my USB devices >>>> (keyboard/mouse) are active 100% of the time and to enable USB >>>> suspend, which I do, but it keeps telling me constantly. How can I >>>> tell if: >>>> >>>> A) USB suspend is actually on or not >>>> B) powertop is doing anything when I press "U" >>>> >>>> I've got USB Suspend/resume support in my kernel, and according to the >>>> kernel docs the usbcore.usbsuspend default delay is 2 (powertop >>>> suggests changing it to 1). >>>> >>>> Powertop's refresh delay is 5 seconds. >>>> >>>> Thanks, >>>> Paul >>>> >>>> >>> Check for USB_SUSPEND in /proc/config.gz >> >> I do not have a /proc/config.gz but i have this in /boot/config: >> >> CONFIG_USB_SUSPEND=y >> > Are you sure you're running a kernel with that configured? Why not > enable kernel .config? It's [CONFIG_IKCONFIG] General Setup -> Kernel > .config support. Obviously it adds more to your kernel images but it > makes tracking down problems like this very easy. I too have a usb > keyboard / mouse and I'm pretty sure powertop doesn't register 100% for > those interfaces... Heck, unless you're 100% opposed to turning on > kernel .config support (or can't reboot the server), turn it on, > recompile, install, reboot and see if CONFIG_USB_SUSPEND is there, and > see what powertop says. > > I was trying to chase down a similar problem (disabling kernel options) > when I was getting vmalloc() errors with xfs and I discovered that they > always weren't taking affect. My guess was I rebooted before cache > could be written to disk.
Hi, I actually had it enabled in my kernel, but as a module, and I have never used it before so I didn't even realize it was there. I had to dig a little to find out that "modprobe configs" is what I needed to turn it on. I have this section: # # Miscellaneous USB options # CONFIG_USB_DEVICEFS=y # CONFIG_USB_DEVICE_CLASS is not set # CONFIG_USB_DYNAMIC_MINORS is not set CONFIG_USB_SUSPEND=y # CONFIG_USB_OTG is not set # CONFIG_USB_MON is not set # CONFIG_USB_WUSB is not set # CONFIG_USB_WUSB_CBAF is not set So it appears I do have it properly configured, at least. Is there any way to tell whether or not a device is suspended, or if autosuspend is kicking in? I don't know what's it's supposed to do, really. Does the fact that I'm using a desktop computer mean that there's a chance USB suspend isn't even available? Thanks, Paul
