Bad interaction between ehci-hcd and acpi?

Bad interaction between ehci-hcd and acpi?

[Bryan K. Wright]

Hi folks,

	The ehci-hcd kernel module enables support for high-speed USB
devices.  I've noticed the following oddity:  When I plug in a high-speed
USB device, the CPU temperature jumps up by about 25 degrees C.  The 
temperature stays up even after I unplug the USB device.  Rmmod'ing
the ehci-hcd module brings the temperature back down.  I can then
re-install the ehci-hcd module, and things stay normal until the next
time I plug in a high-speed USB device.

	Here are the configuration details:
Kernel 2.4.21 (vanilla) with the acpi-20030619-2.4.21.diff patch.
Sharp PC-AV18 laptop (KN266, Athlon XP-M 1800+)
Tested with two different models of Epson scanner, and with two different
brands of external USB disks.

	I've also recently tried using 'athcool', which enables
the VLink auto-disconnect bit and the 'bus disconnect on STPGNT' bit
(this was already set).  I'd hoped it might fix the odd behavior noted
above, but athcool doesn't seem to make any difference.

	Has anybody else seen similar symptoms?

						Thanks,
						Bryan
-- 
===============================================================================
Bryan Wright                |"If you take cranberries and stew them like 
Physics Department          | applesauce, they taste much more like prunes 
University of Virginia      | than rhubarb does."  --  Groucho 
Charlottesville, VA  22901  |			
(434) 924-7218              |         bryan-4Ng6DfrEGID2fBVCVOL8/A@public.gmane.org
===============================================================================




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Bad interaction between ehci-hcd and acpi?

[Bryan K. Wright]

(Sorry if this is a duplicate.  I just realized that I wasn't subscribed
to acpi-devel.  I've subscribed now.)

Hi folks,

	The ehci-hcd kernel module enables support for high-speed USB
devices.  I've noticed the following oddity:  When I plug in a high-speed
USB device, the CPU temperature jumps up by about 25 degrees C.  The 
temperature stays up even after I unplug the USB device.  Rmmod'ing
the ehci-hcd module brings the temperature back down.  I can then
re-install the ehci-hcd module, and things stay normal until the next
time I plug in a high-speed USB device.

	Here are the configuration details:
Kernel 2.4.21 (vanilla) with the acpi-20030619-2.4.21.diff patch.
Sharp PC-AV18 laptop (KN266, Athlon XP-M 1800+)
Tested with two different models of Epson scanner, and with two different
brands of external USB disks.

	I've also recently tried using 'athcool', which enables
the VLink auto-disconnect bit and the 'bus disconnect on STPGNT' bit
(this was already set).  I'd hoped it might fix the odd behavior noted
above, but athcool doesn't seem to make any difference.

	Has anybody else seen similar symptoms?

						Thanks,
						Bryan

-- 
===============================================================================
Bryan Wright                |"If you take cranberries and stew them like 
Physics Department          | applesauce, they taste much more like prunes 
University of Virginia      | than rhubarb does."  --  Groucho 
Charlottesville, VA  22901  |			
(434) 924-7218              |         bryan-4Ng6DfrEGID2fBVCVOL8/A@public.gmane.org
===============================================================================




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Re: Bad interaction between ehci-hcd and acpi?

[Sérgio Monteiro Basto]

On Mon, 2004-03-01 at 17:08, Bryan K. Wright wrote:
> 	Here are the configuration details:
> Kernel 2.4.21 (vanilla) with the acpi-20030619-2.4.21.diff patch.
> Sharp PC-AV18 laptop (KN266, Athlon XP-M 1800+)
> Tested with two different models of Epson scanner, and with two different
> brands of external USB disks.

> 
> 	Has anybody else seen similar symptoms?

yes we had this symptoms when we work with that kernel(2.4.21) after 4
release 2.4.25 I don't remember any complain.
Please upgrade you kernel to last one, and test it again .

 
> 
> 						Thanks,
> 						Bryan
-- 
Sérgio M. B.



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Re: Bad interaction between ehci-hcd and acpi?

[Bryan K. Wright]

Hi again,

	Thanks to Sérgio Monteiro Basto for the suggestion about upgrading
to a slightly later kernel.  This seems to help, but there's still a 
problem.  I'm now using 2.4.25.  The overheating problem is less, but
the temperature still rises by about 10 degrees whenever I plug in
a high-speed USB device, and stays there until I rmmod the ehci-hcd
module.  After removing the module, the temperature drops (within a few
seconds) back to a normal value.

						Bryan

sergiomb-hHo3WeeoaswVhHzd4jOs4w@public.gmane.org said:
> On Mon, 2004-03-01 at 17:08, Bryan K. Wright wrote:
> 	Here are the configuration details:
> Kernel 2.4.21 (vanilla) with the acpi-20030619-2.4.21.diff patch.
> Sharp PC-AV18 laptop (KN266, Athlon XP-M 1800+)
> Tested with two different models of Epson scanner, and with two
> different
> brands of external USB disks.
> 
> 	Has anybody else seen similar symptoms?

> yes we had this symptoms when we work with that kernel(2.4.21) after 4
> release 2.4.25 I don't remember any complain. Please upgrade you
> kernel to last one, and test it again . 


-- 
===============================================================================
Bryan Wright                |"If you take cranberries and stew them like 
Physics Department          | applesauce, they taste much more like prunes 
University of Virginia      | than rhubarb does."  --  Groucho 
Charlottesville, VA  22901  |			
(434) 924-7218              |         bryan-4Ng6DfrEGID2fBVCVOL8/A@public.gmane.org
===============================================================================




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