Re: kern/57696: NetBSD-10.0_RC1-amd64-install.img.gz kernel panics at reboot or shutdown on mid 2010 21.5" iMac

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

The following reply was made to PR kern/57696; it has been noted by GNATS.

From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
To: Josh Moyer <JMoyer%NODOMAIN.NET@localhost>
Cc: gnats-bugs%NetBSD.org@localhost, netbsd-bugs%NetBSD.org@localhost,
	dyoung%NetBSD.org@localhost
Subject: Re: kern/57696: NetBSD-10.0_RC1-amd64-install.img.gz kernel panics at reboot or shutdown on mid 2010 21.5" iMac
Date: Mon, 13 Nov 2023 15:03:04 +0000

 Can you share dmesg?  Maybe dmesg with `boot -v -x'?
 
 Looks like the failed attach path in ohci(4) and uhci(4) won't put the
 device on the usb_pci list, which breaks detach because detach assumes
 it is on the list.
 
 That said, I'm not sure why we set DVF_DETACH_SHUTDOWN for ohci(4) and
 uhci(4) in the first place to make them detach on shutdown; it was set
 by dyoung@ in 2009 with a commit message that doesn't say anything
 about why the change was made.  dyoung: Do you remember anything?
 
 We can fix the interaction of failed attach with detach, or we can
 remove DVF_DETACH_SHUTDOWN, but there's probably an underlying problem
 on attach that the dmesg will provide hints about, and that's what we
 should really try to fix.