PROBLEM: Intermittent hard locks on 3.0.7-1 without information

[Matt Earnshaw]

[1.] 3.0.7-1 appears to cause hard locks intermittently, without information

[2.] Full description:
The system occasionally (approx. once or twice an hour) completely locks 
up, without caps-lock lights or responding to SysRq. Sounds being played 
loop, graphics output freezes etc. No clues are left in dmesg, or in any 
of the logs in /var/log. Downgrading to 3.0.6-2 resolves the issue.

[4.1.] Kernel version (from /proc/version):
(3.0.7-1) Linux version 3.0-ARCH (tobias@T-POWA-LX) (gcc version 4.6.1 
20110819 (prerelease) (GCC) ) #1 SMP PREEMPT Wed Oct 19 10:27:51 CEST 2011

[4.2.] Kernel .config file:
http://pastebin.com/XTXmUX8m

[5.] Most recent kernel version which did not have the bug:
3.0.6-2

[8.1.] Software (add the output of the ver_linux script here)
http://pastebin.com/qw8a9RFH

[8.2.] Processor information (from /proc/cpuinfo):
http://pastebin.com/AN0Df77y

[8.3.] Module information (from /proc/modules):
http://pastebin.com/LMThRSmg

[8.4.] Loaded driver and hardware information (/proc/ioports, /proc/iomem)
ioports: http://pastebin.com/R1aX4H8H
iomem: http://pastebin.com/z8srsFbD

[8.5.] PCI information ('lspci -vvv' as root)
http://pastebin.com/GbniVsFm

[8.6.] SCSI information (from /proc/scsi/scsi)
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: HITACHI HTS72323 Rev: EC2Z
  Type:   Direct-Access                    ANSI  SCSI revision: 05

[X.] Other notes, patches, fixes, workarounds:
Refer to https://bugs.archlinux.org/task/26614 for others with what is 
possibly the same problem.
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