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Remote Buddy Forum

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AuthorThread
User

10.10.2007 05:35:24
Kernel Panic for me too
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This posting is older than 6 months and can contain outdated information.
I love RM, purchased three licenses for my three machines that I'm using it on. One of the machines is a Mac Mini G4 1.25ghz that does nothing except run Matinee and Remote Buddy, streaming from a server in the basement, running 10.4.10. This computer has been running solid for a month with no problems. Tonight I got the pop-up to update the software and the kernel extension, so I did those things. Now, every time I use my Keyspan remote control to put the Mini to sleep, I get a kernel panic. This has happened three times in a row. Like someone asked a few threads down, how can I go back to the previous version? Was this tested on G4's? One of my other machines is a headless G4 iBook and I'm definitely NOT going to upgrade the software. 

These entries from the FAQ may be relevant to this topic:

Driver
General
Hardware - Apple® Remote
Hardware - iPhone™ / iPod® touch / AJAX Remote
User

10.10.2007 09:58:03
Re: Kernel Panic for me too
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This posting is older than 6 months and can contain outdated information.
Hello Matthew,

please send me your /Library/Logs/panic.log to info@iospirit.com or 
post it here. I'll send you V1.1 in return if you wish.

Which exact version of Remote Buddy are you using? 1.7, 1.7.1, 1.7.2 
or 1.7.3?

I'd be surprised if Remote Buddy's kernel extension is related to the 
panic, thougfh as it is identical to that of V1.1 except it was 
compiled with XCode 3 instead of XCode 2.4.x.

Best regards, 
Felix 

User

10.10.2007 14:55:54
Re: Kernel Panic for me too
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This posting is older than 6 months and can contain outdated information.
Remote Buddy: 1.7.3

This is the latest crash from last night. I can send the other two if needed.

Tue Oct 9 23:26:47 2007

Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000000000000 PC=0x000000000044B060 
Latest crash info for cpu 0: 
Exception state (sv=0x2E6F0C80) 
PC=0x0044B060; MSR=0x00009030; DAR=0x00000000; DSISR=0x40000000; LR=0x004536AC; R1=0x0CFBBD10; XCP=0x0000000C (0x300 - Data access) 
Backtrace: 
0x00000013 0x004536AC 0x0045360C 0x0003C884 0x000A9514 
Kernel loadable modules in backtrace (with dependencies): 
com.apple.iokit.IOUSBFamily(2.8.1)@0x43f000 
Proceeding back via exception chain: 
Exception state (sv=0x2E6F0C80) 
previously dumped as "Latest" state. skipping... 
Exception state (sv=0x00CDC500) 
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

Kernel version: 
Darwin Kernel Version 8.10.0: Wed May 23 16:50:59 PDT 2007; root:xnu-792.21.3~1/RELEASE_PPC 
panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access 
Latest stack backtrace for cpu 0: 
Backtrace: 
0x000952D8 0x000957F0 0x00026898 0x000A8004 0x000AB980 
Proceeding back via exception chain: 
Exception state (sv=0x2E6F0C80) 
PC=0x0044B060; MSR=0x00009030; DAR=0x00000000; DSISR=0x40000000; LR=0x004536AC; R1=0x0CFBBD10; XCP=0x0000000C (0x300 - Data access) 
Backtrace: 
0x00000013 0x004536AC 0x0045360C 0x0003C884 0x000A9514 
Kernel loadable modules in backtrace (with dependencies): 
com.apple.iokit.IOUSBFamily(2.8.1)@0x43f000 
Exception state (sv=0x00CDC500) 
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

Kernel version: 
Darwin Kernel Version 8.10.0: Wed May 23 16:50:59 PDT 2007; root:xnu-792.21.3~1/RELEASE_PPC

Last edited: 10.10.2007 14:58:34 

User

10.10.2007 16:46:16
Re: Re: Kernel Panic for me too
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This posting is older than 6 months and can contain outdated information.
Thanks a lot. If possible, I'd also like to take a look at the other 
ones.

In the meantime, I'll be trying to reproduce the panic on a G5.

Best regards, 
Felix 

User

10.10.2007 17:41:22
Re: Kernel Panic for me too
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This posting is older than 6 months and can contain outdated information.
Felix, I emailed it to the address you specified. 
User

12.10.2007 01:09:17
Re: Kernel Panic for me too
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This posting is older than 6 months and can contain outdated information.
Any luck reproducing it with the G5? 
User

12.10.2007 11:44:01
Re: Re: Kernel Panic for me too
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This posting is older than 6 months and can contain outdated information.
Yes. It took some time, but finally I was able to reproduce it by 
letting the G5 go to sleep and wake over and over again.

As the panic log already suggests, the panic is actually happening in 
Apple's IOUSBFamily. So I dived into Apple's sourcecode, isolated the 
problem and by now have completed a workaround.

Result: 
- Remote Buddy's kernel extension is not to blame and thus also 
doesn't need an update. 
- The problem is caused by how the USB APIs are used from user-space. 
- The problem only does/did affect users of the Keyspan RF Remote for 
Front Row.

I plan to release the workaround - along with a fix for the "some apps 
keep relaunching" issue (which needs some more debugging and code 
reviewing as I can't reproduce it with 1.7.3 anymore) - later today.

Best regards, 
Felix