Paul Hartman wrote: > 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" >>>>>
<snip> >>>>> >>>>> >>>> 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? Ok, now I'm confused. USB_SUSPEND can't be configured as a module, so I have no idea what you're talking about. I apparently don't have it configured on this machine (shame on me) so I'm recompiling right now, I'll reboot and let you know so I can help more. Again though, the only way I'm 100% sure *anything* is in my running kernel is by checking /proc/config.gz. Granted that's not even 100% because there are plenty of times I just add modules and don't install the new kernel. -- Eric Martin Key fingerprint = D1C4 086E DBB5 C18E 6FDA B215 6A25 7174 A941 3B9F
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