Hello,

in the meantime I had two crashes.
the first time nothing was shown via netconsole, see ~ line 536 in the
attached netconsole.log


second crash, beginning at line 1585 in netconsole.log:

[ 1911.613543] general protection fault: 0000 [#1] SMP
[ 1911.613579] CPU 1
[ 1911.613585] Modules linked in: snd_hrtimer ip6table_filter ip6_tables
iptable_filter ip_tables x_tables cpufreq_stats cpufreq_userspace
cpufreq_conservative ppdev lp bnep rfcomm bluetooth rfkill crc16
binfmt_misc uinput fuse nfsd nfs nfs_acl auth_rpcgss fscache lockd
sunrpc ext3 mbcache jbd netconsole configfs hwmon_vid wire cn bridge stp
usblp sata_mv powernow_k8 mperf ahci libahci cpufreq_powersave sg
aic79xx aic7xxx scsi_transport_spi msr cpuid aes_x86_64 aes_generic
firewire_sbp2 loop dm_crypt snd_hda_codec_analog snd_hda_intel
snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc
snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq parport_pc parport
psmouse shpchp snd_seq_device snd_timer i2c_nforce2 edac_mce_amd
edac_core pcspkr serio_raw k8temp processor snd soundcore asus_atk0110
evdev reiserfs raid1 md_mod dm_mirror dm_region_hash dm_log dm_mod
vga16fb vgastate usbhid hid sr_mod cdrom sd_mod crc_t10dif nouveau
ata_generic sata_nv ohci_hcd pata_amd libata ehci_hcd video mxm_wmi wmi
i2c_algo_bit drm_kms_helper ttm drm firewire_ohci fan thermal button
firewire_core crc_itu_t scsi_mod usbcore forcedeth i2c_core thermal_sys
usb_common [last unloaded: scsi_wait_scan]

[ 1911.614575]
[ 1911.614583] Pid: 3037, comm: Xorg Not tainted 3.2.0-2-amd64 #1 System
manufacturer System Product Name/M2N32 WS Professional
[ 1911.614610] RIP: 0010:[<ffffffff81282e5a>] [<ffffffff81282e5a>]
skb_drop_fraglist+0x1f/0x2e

[ 1911.614633] RSP: 0018:ffff8801124fdbf8 EFLAGS: 00010286
[ 1911.614643] RAX: ffff880039587e9a RBX: ffff8801177cd180 RCX:
ffff8800321d4000
[ 1911.614656] RDX: ffff88003958401a RSI: 0000000000000016 RDI:
29a1d2c3f1ac0000
[ 1911.614668] RBP: 0000000000000000 R08: ffff8800321d4000 R09:
ffff88004d0c0000
[ 1911.614681] R10: ffff88004d05c000 R11: ffff88004d05c000 R12:
ffff8801177cd180
[ 1911.614693] R13: 0000000000036b00 R14: ffff8801124fdd50 R15:
0000000000000000
[ 1911.614706] FS: 00007ff1ded50880(0000) GS:ffff88011fc80000(0000)
knlGS:00000000f2800b70

[ 1911.614721] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1911.614732] CR2: 00007ff1d01d6000 CR3: 000000011878d000 CR4:
00000000000006e0
[ 1911.614744] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 1911.614757] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[ 1911.614769] Process Xorg (pid: 3037, threadinfo ffff8801124fc000,
task ffff880115b9c9b0)

[ 1911.614782] Stack:
[ 1911.614788] ffff8801177cd180 ffffffff81282b25 0000000000000000
ffff8801177cd180
[ 1911.614816] ffff880118c50a40 ffffffff81282b49 ffff8801124fdd88
ffffffff812f4ceb
[ 1911.614842] ffff880090bba400 ffffffff81037d6e ffffffff81036457
ffff8801124fdce0

[ 1911.614869] Call Trace:
[ 1911.614879] [<ffffffff81282b25>] ? skb_release_data+0xa4/0xb7
[ 1911.614892] [<ffffffff81282b49>] ? __kfree_skb+0x11/0x77
[ 1911.614913] [<ffffffff812f4ceb>] ? unix_stream_recvmsg+0x47f/0x511
[ 1911.614927] [<ffffffff81037d6e>] ? __wake_up+0x35/0x46
[ 1911.614938] [<ffffffff81036457>] ? should_resched+0x5/0x23
[ 1911.614978] [<ffffffffa02d720a>] ? __nouveau_fence_unref+0x1c/0x25
[nouveau]

[ 1911.614993] [<ffffffff8127c075>] ? sock_aio_read.part.9+0x113/0x127
[ 1911.615017] [<ffffffffa02d7c51>] ?
drm_gem_object_unreference_unlocked+0x2b/0x3b [nouveau]
[ 1911.615045] [<ffffffffa02d91c6>] ?
nouveau_gem_ioctl_cpu_prep+0x6c/0x79 [nouveau]

[ 1911.615060] [<ffffffff810f8e7a>] ? do_sync_read+0xab/0xe3
[ 1911.615072] [<ffffffff810f956c>] ? vfs_read+0xa6/0xe6
[ 1911.615083] [<ffffffff810f95f1>] ? sys_read+0x45/0x6b
[ 1911.615095] [<ffffffff8134f3d2>] ? system_call_fastpath+0x16/0x1b
[ 1911.615106] Code: e8 80 e2 ff [ 0.000000] Initializing cgroup
subsys cpuset


seems the problem is with Xorg / nouveau. I'll install the corresponding
debug-packages.


sincerely,

Christoph