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Date: Fri, 10 Oct 2003 08:37:41 -0700 (PDT)
From: Brian Buchanan <bwb@holo.org>
To: current@freebsd.org
Message-ID: <20031010082316.I78790-100000@thought.holo.org>
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Subject: ata broken on Thinkpad A22m
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After updating to yesterday's -CURRENT, my IBM Thinkpad A22m stoped
booting.  It hangs at:

GEOM: create disk ad0 dp=0xc3ded670
ad0: 38154MB <IC25N040ATCS04-0> [77520/16/63] at ata0-master UDMA33
ata1: resetting devices ..
done

The console is still alive, but the kernel appears to be waiting for an
interrupt that will never come.  My Thinkpad is known to have a buggy ata
controller which (sometimes? all the time?) fails to send interrupts for
ata1-slave, and causes various revisions of the kernel to complain in
various places. -CURRENT used to complain at boot, and the most recent
working kernel I have complains at shutdown.

The most recent working kernel, from earlier this week:

GEOM: create disk ad0 dp=0xc3ded670
ad0: 38154MB <IC25N040ATCS04-0> [77520/16/63] at ata0-master UDMA33
acd0: DVDROM <HITACHI DVD-ROM GD-S200> at ata1-master PIO4
Mounting root from ufs:/dev/ad0s3a

at shutdown:

syncing disks, buffers remaining... 3 3 1 1
done
Uptime: 2m21s
ata1-slave: WARNING - FLUSHCACHE recovered from missing interrupt


-- 
Brian Buchanan, CISSP                                         bwb@holo.org
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