On Thu, Jan 22, 2009 at 10:10 AM, Eric Martin <freak4u...@gmail.com> wrote: > 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.
No no no, sorry for not being clearer. I had /proc/config.gz support compiled as a module. Once I did "modprobe configs" it was available for me to look at.
