Bug#799250: linux-image-4.1.0-2-amd64: sporadic freezes overnight

[Thorsten Glaser <tg@mirbsd.de>]

Package: linux-image-4.1.0-2-amd64
Version: 4.1.6-1
Severity: normal

Hi,

I’ve been hit twice by a weird sporadic freeze now. They both
were after upgrading to linux-image-4.1.0-2-amd64 from -1-,
but that may or may not have been the actual cause.

I usually start xlock when going away from the system; over
night (or, recently, over the weekend), the system completely
freezes: the xlock animation stops, no keyboard input works
(even Alt-SysRq-S+U+S+B doesn’t), and the machine does not
respond to IPv4 ping over the LAN. The CPU fans continue to
spin as if BOINC was still running, that may just be the CPU
governour not doing anything due to a kernel crash.

amd64-microcode (2.20141028.1) is installed.

I have no further information: absolutely zero in syslog.
I also have no reproducers, this “just sporadically happens”.

I’d hook up a serial console, but unfortunately, this is one
of those modern desktop-style systems without a COM port…


-- System Information:
Debian Release: stretch/sid
  APT prefers unreleased
  APT policy: (500, 'unreleased'), (500, 'buildd-unstable'), (500, 'unstable')
Architecture: x32 (x86_64)
Foreign Architectures: i386, amd64

Kernel: Linux 4.1.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/lksh
Init: sysvinit (via /sbin/init)

Versions of packages linux-image-4.1.0-2-amd64:amd64 depends on:
ii  debconf [debconf-2.0]                   1.5.57
ii  initramfs-tools [linux-initramfs-tool]  0.120
ii  kmod                                    21-1
ii  linux-base                              4.0

Versions of packages linux-image-4.1.0-2-amd64:amd64 recommends:
ii  firmware-linux-free  3.4
ii  irqbalance           1.0.6-3

Versions of packages linux-image-4.1.0-2-amd64:amd64 suggests:
pn  debian-kernel-handbook  <none>
ii  grub-pc                 2.02~beta2-28
pn  linux-doc-4.1           <none>

-- no debconf information