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Date:      Sat, 22 Jun 2002 12:15:27 -0700
From:      Lars Eggert <larse@ISI.EDU>
To:        Lars Eggert <larse@ISI.EDU>
Cc:        mobile@freebsd.org
Subject:   Re: lockmgr kernel panics with 4.6 on suspend
Message-ID:  <3D14CCCF.4030803@isi.edu>
References:  <3D13141A.50809@isi.edu>
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[-- Attachment #1 --]
Lars Eggert wrote:
> after upgrading my Dell Latitude C600 to 4.6, I get kernel panics 
> (lockmgr, not exclusive lock holder) whenever I try to suspend the 
> machine. I've seen them happen either when suspending, or when resuming.
> 
> Something must have changed between 4.5 and 4.6; a kernel compiled from 
> an identical config file could suspend/resume fine under 4.5

Well, I double-checked the kernel config files, and they were different 
(some of the new 4.6 stuff was enabled). These were the differences:

	options         DEVICE_POLLING
	
	options 	CLK_USE_I8254_CALIBRATION
	options 	CLK_USE_TSC_CALIBRATION
	
	device		puc
	options 	PUC_FASTINTR
	
	options 	PCI_ENABLE_IO_MODES

I removed all these, and suspend/resume works fine. Just thought I'd 
follow up to my problem report, in case others bump into this problem later.

Lars
-- 
Lars Eggert <larse@isi.edu>           USC Information Sciences Institute

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