Subject: Re: Re: [2.6.4] USB malfunction on ACPI resume
From: "Niel Lambrechts" <niella@absamail.co.za>
To: len.brown@intel.com
CC: linux-kernel@vger.kernel.org
Date: Tue, 16 Mar 2004 14:07:56 +0200
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I did put some hope on this, even unloaded all modules up to usbcore prior to suspending, but it does not make a difference to the outcome. 

My response to David Brownell contains a kernel-trace which may be useful (I hope).

Thanks,
Niel

-----Original Message-----
From: Len Brown <len.brown@intel.com>
To: Niel Lambrechts <antispam@absamail.co.za>
Date: 16 Mar 2004 02:25:44 -0500
Subject: Re: [2.6.4] USB malfunction on ACPI resume

how about if you remove the ehci_hcd module before suspending?

-Len

On Sun, 2004-03-14 at 16:46, Niel Lambrechts wrote:
> My Thinkpad R50P (Intel 82855PM with Speedstep 1.7GHz) shows the
> following badness when resuming after an ACPI suspend - even if
> hotplug
> and usb modules were never started beforehand: 
> 
> Mar 12 01:22:42 localhost kernel: 0 at 41
> Mar 12 01:22:42 localhost kernel: ehci_hcd 0000:00:1d.7: capability
> d49a4140 at
> 41                                                                   
> Mar 12 01:22:42 localhost last message repeated 1266
> times                 Mar 12 01:22:42 localhost kernel: 0 at
> 41                                  Mar 12 01:22:42 localhost kernel:
> ehci_hcd 0000:00:1d.7: capability d49a4140 at
> 41                                                                    
> times                  Mar 12 01:22:43 localhost kernel: Kernel
> logging
> (proc) stopped by user.
> 
> This is repeated many many times -> CPU usage jumps to 100% (due to
> ehci_hcd module) and klogd becomes very busy with the above nonsense.
> 
> I cannot remove ehci_hcd, any attempt to rmmod will just hang, only
> resolve is to reboot.
> 
> Niel
> 
> 
> Controller:
> -----------
> 00:1d.0 USB Controller: Intel Corp. 82801DB USB (Hub #1) (rev 01)
> 00:1d.1 USB Controller: Intel Corp. 82801DB USB (Hub #2) (rev 01)
> 00:1d.2 USB Controller: Intel Corp. 82801DB USB (Hub #3) (rev 01)
> 00:1d.7 USB Controller: Intel Corp. 82801DB USB2 (rev 01)
> 


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