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On Thu, Jan 22, 2009 at 7:58 AM, Eric Martin <freak4uxxx@×××××.com> wrote: |
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> Paul Hartman wrote: |
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>> On Tue, Jan 20, 2009 at 8:06 PM, Eric Martin <freak4uxxx@×××××.com> wrote: |
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>>> Paul Hartman wrote: |
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>>>> Hi, |
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>>>> |
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>>>> As the subject line says, powertop constantly tells me my USB devices |
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>>>> (keyboard/mouse) are active 100% of the time and to enable USB |
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>>>> suspend, which I do, but it keeps telling me constantly. How can I |
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>>>> tell if: |
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>>>> |
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>>>> A) USB suspend is actually on or not |
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>>>> B) powertop is doing anything when I press "U" |
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>>>> |
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>>>> I've got USB Suspend/resume support in my kernel, and according to the |
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>>>> kernel docs the usbcore.usbsuspend default delay is 2 (powertop |
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>>>> suggests changing it to 1). |
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>>>> |
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>>>> Powertop's refresh delay is 5 seconds. |
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>>>> |
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>>>> Thanks, |
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>>>> Paul |
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>>>> |
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>>>> |
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>>> Check for USB_SUSPEND in /proc/config.gz |
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>> |
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>> I do not have a /proc/config.gz but i have this in /boot/config: |
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>> |
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>> CONFIG_USB_SUSPEND=y |
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>> |
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> Are you sure you're running a kernel with that configured? Why not |
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> enable kernel .config? It's [CONFIG_IKCONFIG] General Setup -> Kernel |
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> .config support. Obviously it adds more to your kernel images but it |
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> makes tracking down problems like this very easy. I too have a usb |
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> keyboard / mouse and I'm pretty sure powertop doesn't register 100% for |
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> those interfaces... Heck, unless you're 100% opposed to turning on |
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> kernel .config support (or can't reboot the server), turn it on, |
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> recompile, install, reboot and see if CONFIG_USB_SUSPEND is there, and |
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> see what powertop says. |
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> |
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> I was trying to chase down a similar problem (disabling kernel options) |
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> when I was getting vmalloc() errors with xfs and I discovered that they |
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> always weren't taking affect. My guess was I rebooted before cache |
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> could be written to disk. |
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|
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Hi, |
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|
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I actually had it enabled in my kernel, but as a module, and I have |
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never used it before so I didn't even realize it was there. I had to |
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dig a little to find out that "modprobe configs" is what I needed to |
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turn it on. I have this section: |
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|
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# |
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# Miscellaneous USB options |
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# |
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CONFIG_USB_DEVICEFS=y |
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# CONFIG_USB_DEVICE_CLASS is not set |
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# CONFIG_USB_DYNAMIC_MINORS is not set |
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CONFIG_USB_SUSPEND=y |
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# CONFIG_USB_OTG is not set |
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# CONFIG_USB_MON is not set |
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# CONFIG_USB_WUSB is not set |
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# CONFIG_USB_WUSB_CBAF is not set |
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|
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So it appears I do have it properly configured, at least. |
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|
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Is there any way to tell whether or not a device is suspended, or if |
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autosuspend is kicking in? I don't know what's it's supposed to do, |
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really. Does the fact that I'm using a desktop computer mean that |
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there's a chance USB suspend isn't even available? |
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|
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Thanks, |
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Paul |
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