Description:

- Kernel panic occurs randomly within 1 - 2 hours on Lenovo ThinkPad T500 (Fatal exception in interrupt).
- memtest86+ reports no errors (2 passes completed).
- I even tried changing thermal paste on CPU and ATI/Intel switchable graphics without major improvements.
- Can't get Kdump working properly yet. Crash kernel doesn't load after echo c > /proc/sysrq-trigger (followed https://wiki.archlinux.org/index.php/Kdump). Reading Linux Kernel Crash Book by Dedoimedo right now.

Additional info:
* package version(s)

cat /proc/version
Linux version 3.14.4-1-ARCH (nobody@var-lib-archbuild-testing-x86_64-tobias) (gcc version 4.9.0 20140507 (prerelease) (GCC) ) #1 SMP PREEMPT Tue May 13 16:41:39 CEST 2014

* config and/or log files etc.

lsmod
Module Size Used by
reiserfs 239818 1
xt_CHECKSUM 1231 1
iptable_mangle 1616 1
ipt_MASQUERADE 2186 3
iptable_nat 3454 1
nf_nat_ipv4 3728 1 iptable_nat
nf_nat 13005 3 ipt_MASQUERADE,nf_nat_ipv4,iptable_nat
ipt_REJECT 2505 2
xt_tcpudp 3207 6
tun 20995 1
bridge 99735 0
stp 1653 1 bridge
llc 3729 2 stp,bridge
ctr 3927 3
ccm 8278 3
xt_LOG 13124 1
nf_conntrack_ipv4 9474 3
nf_defrag_ipv4 1499 1 nf_conntrack_ipv4
xt_conntrack 3425 2
nf_conntrack 75656 6 ipt_MASQUERADE,nf_nat,nf_nat_ipv4,xt_conntrack,iptable_nat,nf_conntrack_ipv4
iptable_filter 1552 1
ip_tables 17923 3 iptable_filter,iptable_mangle,iptable_nat
x_tables 17344 9 xt_CHECKSUM,ip_tables,xt_tcpudp,ipt_MASQUERADE,xt_conntrack,xt_LOG,iptable_filter,ipt_REJECT,iptable_mangle
btusb 19720 0
bluetooth 352753 2 btusb
6lowpan_iphc 11556 1 bluetooth
iTCO_wdt 5535 0
joydev 10367 0
mousedev 10912 0
ppdev 7278 0
iTCO_vendor_support 1929 1 iTCO_wdt
coretemp 6550 0
kvm_intel 134316 0
kvm 419846 1 kvm_intel
evdev 11784 14
microcode 17157 0
mac_hid 3273 0
psmouse 92968 0
serio_raw 5009 0
arc4 2064 2
i2c_i801 11364 0
iwldvm 171439 0
pcmcia 46612 0
mac80211 510593 1 iwldvm
radeon 1330458 4
r852 9777 0
sm_common 8709 1 r852
nand 55793 2 r852,sm_common
nand_ecc 3679 1 nand
nand_ids 5745 1 nand
mtd 41348 2 nand,sm_common
ttm 66913 1 radeon
lpc_ich 13560 0
drm_kms_helper 35720 1 radeon
snd_hda_codec_conexant 38779 1
drm 242043 6 ttm,drm_kms_helper,radeon
i2c_algo_bit 5480 1 radeon
i2c_core 25400 5 drm,i2c_i801,drm_kms_helper,i2c_algo_bit,radeon
r592 11983 0
snd_hda_codec_generic 53860 2 snd_hda_codec_conexant
memstick 7664 1 r592
yenta_socket 34233 0
pcmcia_rsrc 9392 1 yenta_socket
pcmcia_core 14655 3 pcmcia,pcmcia_rsrc,yenta_socket
iwlwifi 151777 1 iwldvm
cfg80211 459335 3 iwlwifi,mac80211,iwldvm
thinkpad_acpi 65040 0
snd_hda_intel 38728 2
nvram 6034 1 thinkpad_acpi
snd_hda_codec 101816 3 snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel
snd_hwdep 6396 1 snd_hda_codec
snd_pcm 81607 2 snd_hda_codec,snd_hda_intel
snd_timer 19038 1 snd_pcm
snd 60086 12 snd_hwdep,snd_timer,snd_hda_codec_conexant,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,thinkpad_acpi
soundcore 5551 1 snd
parport_pc 20023 0
thermal 8812 0
battery 7821 0
wmi 8539 0
shpchp 25706 0
parport 30901 2 ppdev,parport_pc
e1000e 228148 0
rfkill 15971 4 cfg80211,thinkpad_acpi,bluetooth
hwmon 3153 3 coretemp,thinkpad_acpi,radeon
ptp 8404 1 e1000e
pps_core 8993 1 ptp
intel_agp 11504 0
ac 3366 0
mei_me 9904 0
mei 65600 1 mei_me
intel_gtt 12856 1 intel_agp
tpm_tis 9310 0
tpm 23363 1 tpm_tis
video 12057 0
button 4765 0
acpi_cpufreq 10170 1
processor 25217 3 acpi_cpufreq
pci_stub 1381 1
vboxpci 14995 0
vboxnetflt 17700 0
vboxnetadp 18547 0
vboxdrv 278190 3 vboxnetadp,vboxnetflt,vboxpci
ext4 505509 4
crc16 1359 2 ext4,bluetooth
mbcache 6266 1 ext4
jbd2 86487 1 ext4
dm_mod 85256 15
hid_generic 1217 0
usbhid 41089 0
hid 92246 2 hid_generic,usbhid
sd_mod 37234 4
sr_mod 15026 0
crc_t10dif 1135 1 sd_mod
cdrom 35191 1 sr_mod
crct10dif_common 1436 1 crc_t10dif
mmc_block 27169 2
atkbd 16934 0
libps2 4507 2 atkbd,psmouse
sdhci_pci 12475 0
firewire_ohci 33053 0
sdhci 29492 1 sdhci_pci
led_class 3611 3 sdhci,iwldvm,thinkpad_acpi
mmc_core 100418 3 mmc_block,sdhci,sdhci_pci
firewire_core 53548 1 firewire_ohci
crc_itu_t 1363 1 firewire_core
ahci 24107 3
libahci 21708 1 ahci
libata 174140 2 ahci,libahci
scsi_mod 137184 3 libata,sd_mod,sr_mod
ehci_pci 4152 0
uhci_hcd 34795 0
ehci_hcd 64875 1 ehci_pci
usbcore 187240 5 btusb,uhci_hcd,ehci_hcd,ehci_pci,usbhid
usb_common 1712 1 usbcore
i8042 13135 1 libps2
serio 10785 7 serio_raw,atkbd,i8042,psmouse

---------------

lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:01.0 PCI bridge: Intel Corporation Mobile 4 Series Chipset PCI Express Graphics Port (rev 07)
00:03.0 Communication controller: Intel Corporation Mobile 4 Series Chipset MEI Controller (rev 07)
00:19.0 Ethernet controller: Intel Corporation 82567LM Gigabit Network Connection (rev 03)
00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 03)
00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 03)
00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 03)
00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 03)
00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 93)
00:1f.0 ISA bridge: Intel Corporation ICH9M-E LPC Interface Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] (rev 03)
00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 03)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV635/M86 [Mobility Radeon HD 3650]
03:00.0 Network controller: Intel Corporation PRO/Wireless 5100 AGN [Shiloh] Network Connection
15:00.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev ba)
15:00.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 04)
15:00.2 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 21)
15:00.4 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 11)
15:00.5 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 11)


Steps to reproduce:

Not reproducible kernel panic.