Re: Connected USB devices cause coma when entering deep sleep
Re: Connected USB devices cause coma when entering deep sleep
- Subject: Re: Connected USB devices cause coma when entering deep sleep
- From: Garth Cummings <email@hidden>
- Date: Thu, 23 Sep 2004 09:27:24 -0700
Hi Mike,
On Sep 23, 2004, at 6:58 AM, Michael Ellis wrote:
Hi Thierry.
Thanks for responding to my post. However, as I pointed out in my
original message, it turns out that the problem is NOT specifically
related to the PowerChute software. I wrote:
However, recently I added an EPSON RX500 Multifunction device
(printer, scanner, card reader) to the system. With this device
attached, I experience the sleep problem 100% of the time, whenever
the system attempts to enter deep sleep. This confirms that the
problem is related to USB, but it is not confined to the APC UPS as I
had previously thought. The repeatability of the failure with the
EPSON attached is more annoying, but at least it is predictable and
that's the first step in hunting down this sort of problem.
So, while I'm interested in your UPS control software for other
reasons, I'm not optimistic that it will help with this specific
problem (of freezing when entering deep sleep).
Thanks anyway.
-Mike
I'm presuming you're using the built-in USB and not a PCI card.
A suggestion: try the USB mailing list since the folks responsible for
USB hang out there:
<http://lists.apple.com/mailman/listinfo/usb>.
Also give USB Prober
<file:///Developer/Applications/Utilities/USB Prober.app> a try with
logging turned up. If that doesn't yield enough info, try installing
the USB Debug Kit corresponding to your version of Mac OS X. That will
enable lots of logging in USB Prober.
USB Debug Kits:
<http://developer.apple.com/hardware/usb/usbloggers.htm>
Good luck,
--gc
On Sep 22, 2004, at 8:59 PM, Thierry Bucco wrote:
Hi Michael,
I am unable to get an answer at your question, but maybe you should
take a look at my UPS software called TimeLeft. It's free...
Regards,
Thierry
Le 22 sept. 04, à 16:29, Michael Ellis a écrit :
Hi folks.
I'm interesting in troubleshooting the following problem, so I'm
hoping to get some advice as to which module I should look into
(IOKit or the Power Management System).
For the past few months, I have periodically encountered an issue
when the computer is entering deep sleep. The symptoms are:
1) The display goes dark
2) The power light DOES NOT pulsate as it would if the computer was
sleeping
3) The fans continue to run
4) The computer is unresponsive to remote login (ssh) and it will
not wake up when a keyboard or mouse event is generated
I suspected that it might be a problem with the PowerChute driver
for my APC UPS, so I've been running for a few weeks with the APC's
USB cable disconnected. During that time, I have not encountered
the issue, so I figured it was the APC software.
However, recently I added an EPSON RX500 Multifunction device
(printer, scanner, card reader) to the system. With this device
attached, I experience the sleep problem 100% of the time, whenever
the system attempts to enter deep sleep. This confirms that the
problem is related to USB, but it is not confined to the APC UPS as
I had previously thought. The repeatability of the failure with the
EPSON attached is more annoying, but at least it is predictable and
that's the first step in hunting down this sort of problem.
So the question remains: is this likely related to the system's USB
support, or is it related to the power management system?
I'd appreciate any thoughts.
-Mike Ellis
=========================
Michael F. Ellis
President
Ellis Softworks Inc.
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Web: http://www.ellissoftworks.com
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Michael F. Ellis
President
Ellis Softworks Inc.
----------
Phone: (941) 713-0361
Email: email@hidden
Web: http://www.ellissoftworks.com
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__________________________________________________________________
Garth Cummings
Apple Developer Technical Support email@hidden
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