Alberto Gonzalez wrote:
> Hi,
> 
> I have a Dell Studio desktop with a USB mouse and keyboard. Until now, every 
> time I ran powertop it told me to enable USB auto-suspend by pressing the U 
> key. Doing so had no effect and it would continue to tell me the same again 
> and 
> again.
> 
> Now I have upgraded to kernel 2.6.30 (a distro kernel - Arch Linux) and 
> powertop tells me to enable USB auto-suspend too,  the difference is that now 
> it does have an effect and the wakeups get reduced. The problem is that I 
> lose 
> my mouse and keyboard.

BAD BAD BAD

You've found a piece of hardware that is broken. Please report the `lsusb -v`
output and tell us which devices are affected. This way Sarah can maybe check 
and
fix this upstream.

for now, I advise you to not use the usb suspend suggestions in powertop :)


> Is this the desired effect of enabling USB auto-suspend? 

obviously not :)

> Or was the previous behavior the correct one? Hhmm, shouldn't it be something 
> in between, i.e, that USB get suspended when I'm not using the keyboard or 
> mouse but that it wakes up when I do?

usb suspend was largely broken in older kernels. newer kernels honor the 
powertop
changes but thus expose broken devices.

Auke

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