ACPI, USB, and the tangled web
Anish Mistry
mistry.7 at osu.edu
Thu Oct 16 18:51:57 PDT 2003
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First off, if you've been following my dabbling in fixing the USB resume
problem on my laptop you know that I have been plauged by the infamous
restart on second suspend with a usb device being accessed during the second
suspend (ie. wiggling mouse). Yesterday after finally updating to a current
that boots my system after a couple of weeks without it I suspended the
system and resumed it to check some ACPI issues had been fixed, but that's
for another time. After resume I realized I needed my mouse, so I plugged it
in, dynamically loaded the kernel module and the mouse worked (normal/
previous). Then I suspend the laptop and was wiggling the mouse while it was
suspending (bad habit from testing) and the system REBOOTED, and my patches
weren't even applied! Strangly enough I had never actually tested this
situation before, so I had assumed it was my code that was the problem.
There seems to be some ACPI problem, since I just tested the same procedure
on with ACPI disabled and there was no reboot.
http://am-productions.biz/debug/acpidump.txt
http://am-productions.biz/debug/littleguy.dsdt
http://am-productions.biz/debug/littleguy.asl
http://am-productions.biz/debug/dmesg.txt
dmesg attached too.
- --
Anish Mistry
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