Re: kernel 2.6.10 , uhci-hcd problem after ACPI S3 suspend.

[Paul Ionescu <i_p_a_u_l@yahoo.com>]

Hi Alan,

My UHCI is sharing interrupt 9 with acpi.
IRQ 9 usage does increment after the resume.
And also, even after the resume, when the USB is not
seeing any device plugged in, if I unload and reload
the uhci-hcd, then it works.
Maybe, when I reload uhci-hcd, it does some
reinitialization of the usb controller.


--- Alan Stern <stern@rowland.harvard.edu> wrote:

> On Wed, 29 Dec 2004, Paul Ionescu wrote:
> 
> > Hello Alan,
> > 
> > If I boot with "acpi=off" then I cannot use ACPI
> S3 to
> > suspend and resume, and my problem appears after
> an
> > ACPI S3 suspend/resume cycle.
> 
> This just occurred to me: After a suspend/resume,
> when the uhci_hcd driver
> doesn't recognize new devices being plugged in, can
> you tell if the
> interrupt count for the driver is changing?  If the
> host controller
> doesn't share an IRQ, the numbers in
> /proc/interrupts will tell the story.
> 
> As another test, what shows up in the debugging file
> for the controller?  
> Under 2.6.9 that file would be in the
> /proc/driver/uhci/ directory, but it
> was recently moved to the debugfs filesystem, and
> I'm not sure whether
> that move was done before or after 2.6.10 was
> released.
> 
> Alan Stern
> 
> 



		
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