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. HTH -- Eric Martin Key fingerprint = D1C4 086E DBB5 C18E 6FDA B215 6A25 7174 A941 3B9F
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