Re: Hello Debugger/Goodbye Machine
Re: Hello Debugger/Goodbye Machine
- Subject: Re: Hello Debugger/Goodbye Machine
- From: Eric Long <email@hidden>
- Date: Tue, 14 Mar 2006 14:37:38 -0800
> it appears that forcing the PMU driver (on
> portables like the PB G4 which are PMU-based) to operate in polled
> mode by adding the "pmuflags=1" boot-arg will bypass one possible
> cause of shutdowns while debugging
That seemed to do the trick for my PB. Thanks for the info.
> Also, from your description, it appears that you're seeing a
> spurious "breakpoint" entry, perhaps because the "NMI" button press
> isn't being adequately de-bounced. Feel free to add to the
> information in radar 4473217 (with a backtrace from the spurious
> breakpoint) if you continue seeing that with the pmuflags boot-arg.
Yeah, that's what it is. I am using the shift-ctrl-opt-cmd-esc method to
break.
The backtrace shows:
#0 Debugger (message=0x525754 "USB Programmer Key") at
/SourceCache/xnu/xnu-792.6.61/osfmk/ppc/model_dep.c:639
#1 0x00512860 in mhp.1758 ()
Cannot access memory at address 0x436a68
#2 0x00512710 in mhp.1758 ()
Cannot access memory at address 0x436a68
#3 0x00512298 in mhp.1758 ()
Cannot access memory at address 0x436a68
#4 0x0051221c in mhp.1758 ()
Cannot access memory at address 0x436a68
#5 0x002d0040 in IOInterruptEventSource::checkForWork (this=0x1f97c00) at
/SourceCache/xnu/xnu-792.6.61/iokit/Kernel/IOInterruptEventSource.cpp:196
#6 0x002cef08 in IOWorkLoop::threadMain (this=0x1eaf880) at
/SourceCache/xnu/xnu-792.6.61/iokit/Kernel/IOWorkLoop.cpp:267
I added the info to the bug report.
Thanks,
Eric
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