Comment 54 for bug 908335

I confirm I have the same problem with a Dell Vostro V131 (with 8GB and a Seagate Momentus 500GB hybrid) I bought six months ago. After upgrading to Ubuntu Precise I started to experience hard freezes, 2-3 times a day, for no reason at completely random moment, even if I am leaving the computer alone. I have tried upgrading and downgrading the kernel but it doesn't help. When the system freezes, keyboard and mouse do not respond, SysRq does not respond, ssh is not possible, after a while the machine becomes quiet and the hard drive stops spinning(!). No useful logs get recorded. Here is the output of lspci:

00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b5)
00:1c.4 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 (rev b5)
00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b5)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation HM67 Express Chipset Family LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06)
09:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
0b:00.0 USB controller: Texas Instruments Device 8241 (rev 02)

here is the output of lsmod:

Module Size Used by
ums_realtek 18248 0
usb_storage 49198 1 ums_realtek
rfcomm 47604 12
bnep 18281 2
parport_pc 32866 0
ppdev 17113 0
binfmt_misc 17540 1
joydev 17693 0
dm_crypt 23125 0
snd_hda_codec_hdmi 32474 1
snd_hda_codec_conexant 62128 1
dell_wmi 12681 0
sparse_keymap 13890 1 dell_wmi
dell_laptop 18119 0
dcdbas 14490 1 dell_laptop
snd_hda_intel 33773 3
snd_hda_codec 127706 3 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
snd_hwdep 13668 1 snd_hda_codec
snd_pcm 97188 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
ath3k 12961 0
snd_seq_midi 13324 0
btusb 18288 2
uvcvideo 72627 0
bluetooth 180104 24 rfcomm,bnep,ath3k,btusb
videodev 98259 1 uvcvideo
v4l2_compat_ioctl32 17128 1 videodev
snd_rawmidi 30748 1 snd_seq_midi
psmouse 87692 0
serio_raw 13211 0
snd_seq_midi_event 14899 1 snd_seq_midi
snd_seq 61896 2 snd_seq_midi,snd_seq_midi_event
snd_timer 29990 2 snd_pcm,snd_seq
snd_seq_device 14540 3 snd_seq_midi,snd_rawmidi,snd_seq
arc4 12529 2
snd 78855 16 snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
mac_hid 13253 0
ath9k 132390 0
mac80211 506816 1 ath9k
ath9k_common 14053 1 ath9k
ath9k_hw 411112 2 ath9k,ath9k_common
ath 24067 3 ath9k,ath9k_common,ath9k_hw
mei 41616 0
cfg80211 205544 3 ath9k,mac80211,ath
soundcore 15091 1 snd
snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
lp 17799 0
parport 46562 3 parport_pc,ppdev,lp
usbhid 47199 0
hid 99559 1 usbhid
uas 18180 0
i915 468764 4
wmi 19256 1 dell_wmi
drm_kms_helper 46978 1 i915
drm 242038 5 i915,drm_kms_helper
i2c_algo_bit 13423 1 i915
video 19596 1 i915

Not sure how to help here. But since it affects multiple machines, it might help starting to share information about what hardware is used by those affected.