Re: [gentoo-user] Powertop constantly tells me to enable USB suspend, but it is already enabled

[Paul Hartman <paul.hartman+gentoo@gmail.com>]

On Thu, Jan 22, 2009 at 10:10 AM, Eric Martin <freak4uxxx@gmail.com> wrote:
> Paul Hartman wrote:
>> On Thu, Jan 22, 2009 at 7:58 AM, Eric Martin <freak4uxxx@gmail.com> wrote:
>>> Paul Hartman wrote:
>>>> On Tue, Jan 20, 2009 at 8:06 PM, Eric Martin <freak4uxxx@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.