Package: src:linux
Version: 4.3.3-5
Severity: normal

Dear Maintainer,

I am experiencing frequent lockups on my laptop using linux-image-4.3.0-1-amd64
(though I already experienced the same problem with earlier kernel versions).
The problem seems to be triggered only when using WiFi, and more specifically
when using the eduroam network <https://en.wikipedia.org/wiki/Eduroam> -- I do
not have the problem when using a home WPA network.

Logs of the errors encountered (from syslog) are attached. Though some are in
the graphical stack, I would suspect that the problem is caused by the WiFi
driver rtl8723au. In particular log0 seems to be about this driver, and log1 is
specific to wpa_supplicant.

The problem often occurs a few seconds/minutes after associating to the eduroam
network, in which cases the display freezes (sometimes partially, e.g., display
is no longer updated but using the keyboard/mouse does not work). Magic SysRq
sometimes works and sometimes doesn't. Sadly I am not aware of a way to
reproduce the crash reliably.

Please ignore the "Unknown key pressed" spam in the Kernel log below, which is
caused by another issue
<https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1227996>.

Thanks!

-- 
Antoine Amarilli

-- Package-specific info:
** Version:
Linux version 4.3.0-1-amd64 (debian-ker...@lists.debian.org) (gcc version 5.3.1 
20160101 (Debian 5.3.1-5) ) #1 SMP Debian 4.3.3-5 (2016-01-04)

** Command line:
BOOT_IMAGE=/boot/vmlinuz-4.3.0-1-amd64 
root=UUID=e3b76e5e-ee21-46dd-b5e2-a4b17f0a00b0 ro cgroup_enable=memory 
i915.enable_execlists=0 resume=UUID=fbf08c76-a232-4d9a-8d4e-70032070617a

** Tainted: C (1024)
 * Module from drivers/staging has been loaded.

** Kernel log:
[  881.574297] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  881.574309] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  881.579348] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  881.579358] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  882.582798] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  882.582813] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  882.587597] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  882.587611] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  883.599962] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  883.599976] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  883.605018] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  883.605028] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  884.623318] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  884.623331] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  884.628378] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  884.628387] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  885.630411] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  885.630422] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  885.635440] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  885.635450] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  886.648435] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  886.648452] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  886.653449] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  886.653462] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  887.655401] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  887.655414] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  887.660420] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  887.660430] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  888.663387] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  888.663400] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  888.668417] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  888.668428] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  889.670599] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  889.670616] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  889.675624] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  889.675636] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  890.707890] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  890.707903] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  890.712942] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  890.712953] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  891.715334] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  891.715347] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  891.720367] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  891.720378] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  892.722791] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  892.722803] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  892.727803] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  892.727816] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  893.740160] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  893.740173] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  893.745208] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  893.745219] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  894.757644] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  894.757655] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  894.762678] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  894.762688] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  895.764883] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  895.764897] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  895.769933] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  895.769942] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  896.878109] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  896.878122] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  896.883219] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  896.883232] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  897.885476] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  897.885489] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  897.890496] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  897.890508] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  898.892979] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  898.892990] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  898.898009] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  898.898018] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  899.934547] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  899.934564] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  899.939586] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  899.939598] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  900.951827] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  900.951841] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  900.956859] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  900.956871] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  901.959108] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  901.959121] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  901.964134] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  901.964143] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  902.966548] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  902.966559] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  902.971585] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  902.971596] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  903.973802] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  903.973813] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  903.978746] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  903.978760] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  905.009930] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  905.009944] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  905.014773] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  905.014783] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  906.033804] atkbd serio0: Unknown key pressed (translated set 2, code 0xbe 
on isa0060/serio0).
[  906.033817] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.
[  906.038833] atkbd serio0: Unknown key released (translated set 2, code 0xbe 
on isa0060/serio0).
[  906.038843] atkbd serio0: Use 'setkeycodes e03e <keycode>' to make it known.

** Model information
sys_vendor: LENOVO
product_name: 2191
product_version: Lenovo IdeaPad Yoga 13
chassis_vendor: LENOVO
chassis_version: Lenovo IdeaPad Yoga 13
bios_vendor: LENOVO
bios_version: 66CN54WW
board_vendor: LENOVO
board_name: INVALID
board_version: 31900003WIN8 STD MLT

** Loaded modules:
dm_crypt
sha256_ssse3
sha256_generic
hmac
drbg
ansi_cprng
xts
gf128mul
algif_skcipher
af_alg
dm_mod
cpufreq_conservative
cpufreq_stats
cpufreq_userspace
cpufreq_powersave
binfmt_misc
bnep
hid_sensor_accel_3d
hid_sensor_gyro_3d
hid_sensor_rotation
hid_sensor_incl_3d
hid_sensor_magn_3d
hid_sensor_trigger
hid_sensor_iio_common
industrialio_triggered_buffer
kfifo_buf
industrialio
rtsx_usb_ms
memstick
hid_multitouch
btusb
r8723au(C)
btrtl
btbcm
btintel
bluetooth
hid_sensor_hub
cfg80211
joydev
uvcvideo
videobuf2_vmalloc
videobuf2_memops
videobuf2_core
v4l2_common
videodev
iTCO_wdt
iTCO_vendor_support
media
ip6t_REJECT
evdev
nf_reject_ipv6
ip6table_filter
snd_hda_codec_hdmi
ip6_tables
intel_rapl
snd_hda_codec_conexant
snd_hda_codec_generic
iosf_mbi
ipt_REJECT
x86_pkg_temp_thermal
nf_reject_ipv4
intel_powerclamp
xt_tcpudp
kvm
snd_hda_intel
snd_hda_codec
xt_owner
snd_hda_core
i915
snd_hwdep
crct10dif_pclmul
snd_pcm_oss
snd_mixer_oss
crc32_pclmul
snd_pcm
snd_timer
snd
soundcore
iptable_filter
cryptd
ip_tables
psmouse
drm_kms_helper
ideapad_laptop
sg
sparse_keymap
drm
serio_raw
lpc_ich
i2c_i801
rfkill
x_tables
mei_me
i2c_algo_bit
mei
wmi
int3400_thermal
battery
acpi_thermal_rel
video
ac
button
processor
coretemp
loop
parport_pc
ppdev
lp
parport
autofs4
usbhid
hid
rtsx_usb_sdmmc
mmc_core
rtsx_usb
mfd_core
ext4
crc16
mbcache
jbd2
sd_mod
crc32c_intel
ahci
libahci
libata
xhci_pci
ehci_pci
scsi_mod
xhci_hcd
ehci_hcd
usbcore
usb_common
thermal

** Network interface configuration:

auto lo
iface lo inet loopback

allow-hotplug usb0
iface usb0 inet dhcp
iface usb0 inet6 auto

** Network status:
*** IP interfaces and addresses:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group 
default 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group 
default qlen 1000
    link/ether a4:db:30:02:54:e7 brd ff:ff:ff:ff:ff:ff
    inet 10.201.1.132/23 brd 10.201.1.255 scope global dynamic wlan0
       valid_lft 42343sec preferred_lft 42343sec
    inet6 fe80::a6db:30ff:fe02:54e7/64 scope link 
       valid_lft forever preferred_lft forever

*** Device statistics:
Inter-|   Receive                                                |  Transmit
 face |bytes    packets errs drop fifo frame compressed multicast|bytes    
packets errs drop fifo colls carrier compressed
 wlan0: 10307341   10835    0 1492    0     0          0         0  1226904    
7883    0    0    0     0       0          0
    lo:       0       0    0    0    0     0          0         0        0      
 0    0    0    0     0       0          0

*** Protocol statistics:
Ip:
    Forwarding: 2
    9231 total packets received
    1 with invalid addresses
    0 forwarded
    0 incoming packets discarded
    9230 incoming packets delivered
    7687 requests sent out
    277 dropped because of missing route
Icmp:
    13 ICMP messages received
    0 input ICMP message failed.
    ICMP input histogram:
        destination unreachable: 11
        echo replies: 2
    2 ICMP messages sent
    0 ICMP messages failed
    ICMP output histogram:
        echo request: 2
IcmpMsg:
        InType0: 2
        InType3: 11
        OutType8: 2
Tcp:
    181 active connections openings
    0 passive connection openings
    11 failed connection attempts
    14 connection resets received
    8 connections established
    8694 segments received
    7076 segments send out
    83 segments retransmited
    2 bad segments received.
    143 resets sent
Udp:
    521 packets received
    0 packets to unknown port received.
    0 packet receive errors
    524 packets sent
    0 receive buffer errors
    0 send buffer errors
UdpLite:
TcpExt:
    54 TCP sockets finished time wait in fast timer
    286 delayed acks sent
    Quick ack mode was activated 32 times
    151 packets directly queued to recvmsg prequeue.
    TCPDirectCopyFromPrequeue: 145
    5580 packet headers predicted
    839 acknowledgments not containing data payload received
    1224 predicted acknowledgments
    10 congestion windows recovered without slow start after partial ack
    TCPTimeouts: 25
    TCPLossProbes: 22
    TCPLossProbeRecovery: 1
    TCPDSACKOldSent: 32
    TCPDSACKRecv: 22
    43 connections reset due to unexpected data
    14 connections reset due to early user close
    TCPDSACKIgnoredNoUndo: 11
    TCPRcvCoalesce: 4068
    TCPOFOQueue: 169
    TCPChallengeACK: 2
    TCPSYNChallenge: 2
    TCPSpuriousRtxHostQueues: 13
    TCPAutoCorking: 4
    TCPFromZeroWindowAdv: 12
    TCPToZeroWindowAdv: 12
    TCPWantZeroWindowAdv: 63
    TCPSynRetrans: 58
    TCPOrigDataSent: 2087
    TCPHystartDelayDetect: 1
    TCPHystartDelayCwnd: 24
    TCPKeepAlive: 441
IpExt:
    InMcastPkts: 6
    OutMcastPkts: 8
    InOctets: 8717564
    OutOctets: 886515
    InMcastOctets: 1350
    OutMcastOctets: 1430
    InNoECTPkts: 9231


** PCI devices:
00:00.0 Host bridge [0600]: Intel Corporation 3rd Gen Core processor DRAM 
Controller [8086:0154] (rev 09)
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort+ >SERR- <PERR- INTx-
        Latency: 0
        Capabilities: <access denied>
        Kernel driver in use: ivb_uncore

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core 
processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 27
        Region 0: Memory at e0000000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at 2000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: i915

00:04.0 Signal processing controller [1180]: Intel Corporation 3rd Gen Core 
Processor Thermal Subsystem [8086:0153] (rev 09)
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 7
        Region 0: Memory at cfa08000 (64-bit, non-prefetchable) [size=32K]
        Capabilities: <access denied>

00:14.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset 
Family USB xHCI Host Controller [8086:1e31] (rev 04) (prog-if 30 [XHCI])
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Interrupt: pin A routed to IRQ 24
        Region 0: Memory at e0400000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: <access denied>
        Kernel driver in use: xhci_hcd

00:16.0 Communication controller [0780]: Intel Corporation 7 Series/C210 Series 
Chipset Family MEI Controller #1 [8086:1e3a] (rev 04)
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 26
        Region 0: Memory at e041c000 (64-bit, non-prefetchable) [size=16]
        Capabilities: <access denied>
        Kernel driver in use: mei_me

00:1a.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset 
Family USB Enhanced Host Controller #2 [8086:1e2d] (rev 04) (prog-if 20 [EHCI])
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at e0421000 (32-bit, non-prefetchable) [size=1K]
        Capabilities: <access denied>
        Kernel driver in use: ehci-pci

00:1b.0 Audio device [0403]: Intel Corporation 7 Series/C210 Series Chipset 
Family High Definition Audio Controller [8086:1e20] (rev 04)
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 28
        Region 0: Memory at e0418000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: <access denied>
        Kernel driver in use: snd_hda_intel

00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset 
Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04) (prog-if 20 [EHCI])
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Interrupt: pin A routed to IRQ 23
        Region 0: Memory at e0420000 (32-bit, non-prefetchable) [size=1K]
        Capabilities: <access denied>
        Kernel driver in use: ehci-pci

00:1f.0 ISA bridge [0601]: Intel Corporation QS77 Express Chipset LPC 
Controller [8086:1e56] (rev 04)
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Capabilities: <access denied>
        Kernel driver in use: lpc_ich

00:1f.2 SATA controller [0106]: Intel Corporation 7 Series Chipset Family 
6-port SATA Controller [AHCI mode] [8086:1e03] (rev 04) (prog-if 01 [AHCI 1.0])
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin B routed to IRQ 25
        Region 0: I/O ports at 2088 [size=8]
        Region 1: I/O ports at 2094 [size=4]
        Region 2: I/O ports at 2080 [size=8]
        Region 3: I/O ports at 2090 [size=4]
        Region 4: I/O ports at 2060 [size=32]
        Region 5: Memory at e041f000 (32-bit, non-prefetchable) [size=2K]
        Capabilities: <access denied>
        Kernel driver in use: ahci

00:1f.3 SMBus [0c05]: Intel Corporation 7 Series/C210 Series Chipset Family 
SMBus Controller [8086:1e22] (rev 04)
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- 
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Interrupt: pin C routed to IRQ 0
        Region 0: Memory at e041d000 (64-bit, non-prefetchable) [size=256]
        Region 4: I/O ports at 2040 [size=32]

00:1f.6 Signal processing controller [1180]: Intel Corporation 7 Series/C210 
Series Chipset Family Thermal Management Controller [8086:1e24] (rev 04)
        Subsystem: Lenovo Device [17aa:3977]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 11
        Region 0: Memory at e041e000 (64-bit, non-prefetchable) [size=4K]
        Capabilities: <access denied>


** USB devices:
Bus 002 Device 004: ID 5986:029c Acer, Inc 
Bus 002 Device 003: ID 2047:0855 Texas Instruments Invensense Embedded 
MotionApp HID Sensor
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 005: ID 04f3:000a Elan Microelectronics Corp. Touchscreen
Bus 001 Device 004: ID 0bda:1724 Realtek Semiconductor Corp. RTL8723AU 802.11n 
WLAN Adapter
Bus 001 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card 
Reader Controller
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (650, 'testing'), (600, 'unstable'), (500, 'testing-updates'), 
(1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.3.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages linux-image-4.3.0-1-amd64 depends on:
ii  debconf [debconf-2.0]                   1.5.58
ii  initramfs-tools [linux-initramfs-tool]  0.120
ii  kmod                                    21-1
ii  linux-base                              4.0

Versions of packages linux-image-4.3.0-1-amd64 recommends:
ii  firmware-linux-free  3.4
ii  irqbalance           1.0.9-1

Versions of packages linux-image-4.3.0-1-amd64 suggests:
pn  debian-kernel-handbook  <none>
ii  extlinux                3:6.03+dfsg-11
ii  grub-pc                 2.02~beta2-33
pn  linux-doc-4.3           <none>

Versions of packages linux-image-4.3.0-1-amd64 is related to:
pn  firmware-atheros                         <none>
pn  firmware-bnx2                            <none>
pn  firmware-bnx2x                           <none>
pn  firmware-brcm80211                       <none>
pn  firmware-intelwimax                      <none>
pn  firmware-ipw2x00                         <none>
pn  firmware-ivtv                            <none>
pn  firmware-iwlwifi                         <none>
pn  firmware-libertas                        <none>
pn  firmware-linux                           <none>
ii  firmware-linux-nonfree                   20151207-1
ii  firmware-misc-nonfree [firmware-ralink]  20151207-1
pn  firmware-myricom                         <none>
pn  firmware-netxen                          <none>
pn  firmware-qlogic                          <none>
ii  firmware-realtek                         20151207-1
pn  xen-hypervisor                           <none>

-- debconf information:
  linux-image-4.3.0-1-amd64/postinst/mips-initrd-4.3.0-1-amd64:
  linux-image-4.3.0-1-amd64/prerm/removing-running-kernel-4.3.0-1-amd64: true
  linux-image-4.3.0-1-amd64/postinst/depmod-error-initrd-4.3.0-1-amd64: false
Jan 13 11:09:20 gamma kernel: [24769.330194] rtl8723au: Loading firmware 
rtlwifi/rtl8723aufw_B.bin
Jan 13 11:09:20 gamma kernel: [24769.330314] rtl8723au 3-1.4:1.2: firmware: 
direct-loading firmware rtlwifi/rtl8723aufw_B.bin
Jan 13 11:09:20 gamma kernel: [24769.666088] ------------[ cut here 
]------------
Jan 13 11:09:20 gamma kernel: [24769.666129] WARNING: CPU: 1 PID: 2208 at 
/build/linux-dUKt9u/linux-4.3.3/drivers/usb/core/urb.c:339
 usb_submit_urb+0x2b7/0x5a0 [usbcore]()
Jan 13 11:09:20 gamma kernel: [24769.666134] URB ffff8800c4428040 submitted 
while active
Jan 13 11:09:20 gamma kernel: [24769.666138] Modules linked in: rndis_host 
cdc_ether usbnet mii rfcomm quota_v2 quota_tree dm_crypt 
sha256_ssse3 sha256_generic hmac drbg ansi_cprng xts gf128mul algif_skcipher 
af_alg dm_mod snd_hrtimer snd_seq_midi snd_seq_midi_eve
nt snd_rawmidi snd_seq snd_seq_device cpufreq_conservative cpufreq_stats 
cpufreq_userspace cpufreq_powersave bnep binfmt_misc uvcvid
eo videobuf2_vmalloc videobuf2_memops hid_sensor_incl_3d hid_sensor_gyro_3d 
hid_sensor_rotation hid_sensor_magn_3d hid_sensor_accel_
3d videobuf2_core hid_sensor_trigger hid_sensor_iio_common 
industrialio_triggered_buffer kfifo_buf v4l2_common industrialio videodev
 media rtsx_usb_ms rtsx_usb_sdmmc memstick mmc_core iTCO_wdt 
iTCO_vendor_support snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_c
odec_generic r8723au(C) btusb btrtl btbcm btintel intel_rapl iosf_mbi cfg80211 
rtsx_usb x86_pkg_temp_thermal bluetooth intel_powercl
amp kvm crct10dif_pclmul snd_hda_intel crc32_pclmul cryptd ip6t_REJECT 
nf_reject_ipv6 snd_hda_codec snd_hda_core snd_hwdep snd_pcm_o
ss snd_mixer_oss snd_pcm ip6table_filter i915 ideapad_laptop snd_timer mei_me 
sparse_keymap psmouse snd serio_raw ip6_tables i2c_i80
1 rfkill sg soundcore lpc_ich mei battery wmi drm_kms_helper video ipt_REJECT 
nf_reject_ipv4 drm int3400_thermal ac acpi_thermal_rel
 i2c_algo_bit button processor xt_tcpudp xt_owner iptable_filter ip_tables 
x_tables evdev joydev hid_multitouch hid_sensor_hub mfd_c
ore usbhid hid coretemp loop parport_pc ppdev lp parport autofs4 ext4 crc16 
mbcache jbd2 sd_mod crc32c_intel ahci libahci libata xhc
i_pci ehci_pci xhci_hcd ehci_hcd scsi_mod usbcore usb_common thermal
Jan 13 11:09:20 gamma kernel: [24769.666385] CPU: 1 PID: 2208 Comm: 
wpa_supplicant Tainted: G         C      4.3.0-1-amd64 #1 Debian
 4.3.3-5
Jan 13 11:09:20 gamma kernel: [24769.666390] Hardware name: LENOVO 
2191/INVALID, BIOS 66CN54WW 01/21/2013
Jan 13 11:09:20 gamma kernel: [24769.666395]  0000000000000000 0000000038f654fb 
ffffffff812ddce9 ffff880036473660
Jan 13 11:09:20 gamma kernel: [24769.666405]  ffffffff81072b1d ffff8800c4428040 
ffff8800364736b8 ffff8800c44dca00
Jan 13 11:09:20 gamma kernel: [24769.666413]  ffff880129105000 ffff8800c31f2a00 
ffffffff81072bac ffffffffa0033b10
Jan 13 11:09:20 gamma kernel: [24769.666421] Call Trace:
Jan 13 11:09:20 gamma kernel: [24769.666436]  [<ffffffff812ddce9>] ? 
dump_stack+0x40/0x57
Jan 13 11:09:20 gamma kernel: [24769.666445]  [<ffffffff81072b1d>] ? 
warn_slowpath_common+0x7d/0xb0
Jan 13 11:09:20 gamma kernel: [24769.666452]  [<ffffffff81072bac>] ? 
warn_slowpath_fmt+0x5c/0x80
Jan 13 11:09:20 gamma kernel: [24769.666476]  [<ffffffffa001fd17>] ? 
usb_submit_urb+0x2b7/0x5a0 [usbcore]
Jan 13 11:09:20 gamma kernel: [24769.666510]  [<ffffffffa07ecd70>] ? 
rtl8723au_write32+0x80/0xa0 [r8723au]
Jan 13 11:09:20 gamma kernel: [24769.666535]  [<ffffffffa07ed39c>] ? 
rtl8723au_read_port+0xbc/0x200 [r8723au]
Jan 13 11:09:20 gamma kernel: [24769.666559]  [<ffffffffa07ec10d>] ? 
rtl8723au_inirp_init+0x3d/0x160 [r8723au]
Jan 13 11:09:20 gamma kernel: [24769.666583]  [<ffffffffa07f3714>] ? 
ips_netdrv_open+0x94/0xf0 [r8723au]
Jan 13 11:09:20 gamma kernel: [24769.666607]  [<ffffffffa07f416a>] ? 
rtw_ips_pwr_up23a+0x2a/0x70 [r8723au]
Jan 13 11:09:20 gamma kernel: [24769.666630]  [<ffffffffa07cf1b4>] ? 
ips_leave23a+0x84/0x1c0 [r8723au]
Jan 13 11:09:20 gamma kernel: [24769.666652]  [<ffffffffa07cfc90>] ? 
_rtw_pwr_wakeup23a+0x2a0/0x370 [r8723au]
Jan 13 11:09:20 gamma kernel: [24769.666675]  [<ffffffffa07f232f>] ? 
cfg80211_rtw_scan+0xaf/0x510 [r8723au]
Jan 13 11:09:20 gamma kernel: [24769.666686]  [<ffffffff810abf2b>] ? 
pick_next_task_fair+0x39b/0x470
Jan 13 11:09:20 gamma kernel: [24769.666697]  [<ffffffff8101466b>] ? 
__switch_to+0x1db/0x580
Jan 13 11:09:20 gamma kernel: [24769.666707]  [<ffffffff812e658e>] ? 
timerqueue_del+0x1e/0x60
Jan 13 11:09:20 gamma kernel: [24769.666716]  [<ffffffff810d7bc6>] ? 
__remove_hrtimer+0x36/0x90
Jan 13 11:09:20 gamma kernel: [24769.666724]  [<ffffffff810d7ce7>] ? 
hrtimer_try_to_cancel+0xc7/0x100
Jan 13 11:09:20 gamma kernel: [24769.666735]  [<ffffffff815840c2>] ? 
schedule_hrtimeout_range_clock.part.23+0xb2/0x140
Jan 13 11:09:20 gamma kernel: [24769.666743]  [<ffffffff810d7a10>] ? 
__hrtimer_init+0x90/0x90
Jan 13 11:09:20 gamma kernel: [24769.666754]  [<ffffffff81473020>] ? 
sock_poll+0x100/0x110
Jan 13 11:09:20 gamma kernel: [24769.666765]  [<ffffffff811e14b4>] ? 
do_select+0x734/0x800
Jan 13 11:09:20 gamma kernel: [24769.666776]  [<ffffffff811b5bae>] ? 
__kmalloc+0x1ae/0x1c0
Jan 13 11:09:20 gamma kernel: [24769.666816]  [<ffffffffa08dda92>] ? 
nl80211_trigger_scan+0x462/0x710 [cfg80211]
Jan 13 11:09:20 gamma kernel: [24769.666826]  [<ffffffff814c05e7>] ? 
genl_family_rcv_msg+0x1a7/0x350
Jan 13 11:09:20 gamma kernel: [24769.666835]  [<ffffffff814c0790>] ? 
genl_family_rcv_msg+0x350/0x350
Jan 13 11:09:20 gamma kernel: [24769.666843]  [<ffffffff814c0801>] ? 
genl_rcv_msg+0x71/0xb0
Jan 13 11:09:20 gamma kernel: [24769.666851]  [<ffffffff814bfdf1>] ? 
netlink_rcv_skb+0xa1/0xc0
Jan 13 11:09:20 gamma kernel: [24769.666858]  [<ffffffff814c0424>] ? 
genl_rcv+0x24/0x40
Jan 13 11:09:20 gamma kernel: [24769.666865]  [<ffffffff814bf5a1>] ? 
netlink_unicast+0x121/0x1a0
Jan 13 11:09:20 gamma kernel: [24769.666872]  [<ffffffff814bfac1>] ? 
netlink_sendmsg+0x4a1/0x600
Jan 13 11:09:20 gamma kernel: [24769.666881]  [<ffffffff811ce368>] ? 
rw_copy_check_uvector+0x68/0x110
Jan 13 11:09:20 gamma kernel: [24769.666890]  [<ffffffff81473060>] ? 
sock_sendmsg+0x30/0x40
Jan 13 11:09:20 gamma kernel: [24769.666896]  [<ffffffff81473969>] ? 
___sys_sendmsg+0x289/0x2a0
Jan 13 11:09:20 gamma kernel: [24769.666905]  [<ffffffff81081400>] ? 
signal_setup_done+0x70/0xc0
Jan 13 11:09:20 gamma kernel: [24769.666912]  [<ffffffff81015495>] ? 
do_signal+0x1b5/0x970
Jan 13 11:09:20 gamma kernel: [24769.666920]  [<ffffffff8102160e>] ? 
__fpu__restore_sig+0xbe/0x440
Jan 13 11:09:20 gamma kernel: [24769.666927]  [<ffffffff8147438e>] ? 
__sys_sendmsg+0x4e/0x90
Jan 13 11:09:20 gamma kernel: [24769.666938]  [<ffffffff81584db2>] ? 
system_call_fast_compare_end+0xc/0x67
Jan 13 11:09:20 gamma kernel: [24769.666944] ---[ end trace d4a9d2a801046139 
]---
Jan 13 11:09:20 gamma kernel: [24769.666951] RTL8723AU: nolinked power save 
leave
Jan 13 13:43:58 gamma kernel: [ 3239.160074] INFO: task wpa_supplicant:2310 
blocked for more than 120 seconds.
Jan 13 13:43:58 gamma kernel: [ 3239.160083]       Tainted: G         C   L  
4.3.0-1-amd64 #1
Jan 13 13:43:58 gamma kernel: [ 3239.160085] "echo 0 > 
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jan 13 13:43:58 gamma kernel: [ 3239.160089] wpa_supplicant  D ffffffff810a08c0 
    0  2310      1 0x00000000
Jan 13 13:43:58 gamma kernel: [ 3239.160098]  ffff88003615e080 0000000000000086 
ffffffff81a13500 ffff8800c2d00000
Jan 13 13:43:58 gamma kernel: [ 3239.160104]  ffff8800c2cffd40 ffff8800c2cffe00 
ffff88003615e080 ffff8800c2cffde8
Jan 13 13:43:58 gamma kernel: [ 3239.160109]  0000000000000001 ffffffff8158113f 
ffff8800c2cffe08 ffffffff81583ee9
Jan 13 13:43:58 gamma kernel: [ 3239.160115] Call Trace:
Jan 13 13:43:58 gamma kernel: [ 3239.160127]  [<ffffffff8158113f>] ? 
schedule+0x2f/0x70
Jan 13 13:43:58 gamma kernel: [ 3239.160134]  [<ffffffff81583ee9>] ? 
schedule_timeout+0x189/0x250
Jan 13 13:43:58 gamma kernel: [ 3239.160143]  [<ffffffff81211aea>] ? 
ep_poll_callback+0xfa/0x160
Jan 13 13:43:58 gamma kernel: [ 3239.160149]  [<ffffffff810b0e8e>] ? 
__wake_up_common+0x4e/0x90
Jan 13 13:43:58 gamma kernel: [ 3239.160155]  [<ffffffff81581b31>] ? 
wait_for_completion+0xf1/0x130
Jan 13 13:43:58 gamma kernel: [ 3239.160162]  [<ffffffff8109afe0>] ? 
wake_up_q+0x60/0x60
Jan 13 13:43:58 gamma kernel: [ 3239.160169]  [<ffffffff810cd4de>] ? 
__wait_rcu_gp+0xbe/0xf0
Jan 13 13:43:58 gamma kernel: [ 3239.160176]  [<ffffffff810cf91e>] ? 
synchronize_sched+0x6e/0x80
Jan 13 13:43:58 gamma kernel: [ 3239.160182]  [<ffffffff810d0fd0>] ? 
call_rcu_bh+0x20/0x20
Jan 13 13:43:58 gamma kernel: [ 3239.160188]  [<ffffffff810cd410>] ? 
trace_raw_output_rcu_utilization+0x60/0x60
Jan 13 13:43:58 gamma kernel: [ 3239.160195]  [<ffffffff8156f4f7>] ? 
packet_release+0x237/0x330
Jan 13 13:43:58 gamma kernel: [ 3239.160204]  [<ffffffff81471c4a>] ? 
sock_release+0x1a/0x70
Jan 13 13:43:58 gamma kernel: [ 3239.160209]  [<ffffffff81471cae>] ? 
sock_close+0xe/0x20
Jan 13 13:43:58 gamma kernel: [ 3239.160216]  [<ffffffff811cf00a>] ? 
__fput+0xca/0x1d0
Jan 13 13:43:58 gamma kernel: [ 3239.160222]  [<ffffffff8108eba1>] ? 
task_work_run+0x71/0x90
Jan 13 13:43:58 gamma kernel: [ 3239.160229]  [<ffffffff81003ade>] ? 
prepare_exit_to_usermode+0xce/0xf0
Jan 13 13:43:58 gamma kernel: [ 3239.160236]  [<ffffffff81584f10>] ? 
int_ret_from_sys_call+0x25/0x8f
Jan 13 13:44:36 gamma kernel: [ 3277.552766] INFO: rcu_sched self-detected 
stall on CPU
Jan 13 13:44:36 gamma kernel: [ 3277.552781]    3: (52508 ticks this GP) 
idle=66f/140000000000001/0 softirq=29505/29505 fqs=52508 
Jan 13 13:44:36 gamma kernel: [ 3277.552784]     (t=52509 jiffies g=18578 
c=18577 q=9608)
Jan 13 13:44:36 gamma kernel: [ 3277.552790] Task dump for CPU 3:
Jan 13 13:44:36 gamma kernel: [ 3277.552793] Xorg            R  running task    
    0  2402   2401 0x0000000e
Jan 13 13:44:36 gamma kernel: [ 3277.552800]  0000000000000004 000000006f0a06dc 
ffffffff810ce0f3 ffff88012f2d6680
Jan 13 13:44:36 gamma kernel: [ 3277.552807]  ffffffff81a516c0 0000000000000000 
ffffffff81afc640 ffffffff810d1755
Jan 13 13:44:36 gamma kernel: [ 3277.552812]  00000000006b9e7d ffff8800c2c4ee80 
ffffffff810dd1ee 001dcd6500000000
Jan 13 13:44:36 gamma kernel: [ 3277.552818] Call Trace:
Jan 13 13:44:36 gamma kernel: [ 3277.552821]  <IRQ>  [<ffffffff810ce0f3>] ? 
rcu_dump_cpu_stacks+0x83/0xd0
Jan 13 13:44:36 gamma kernel: [ 3277.552840]  [<ffffffff810d1755>] ? 
rcu_check_callbacks+0x475/0x730
Jan 13 13:44:36 gamma kernel: [ 3277.552846]  [<ffffffff810dd1ee>] ? 
timekeeping_update+0xee/0x150
Jan 13 13:44:36 gamma kernel: [ 3277.552854]  [<ffffffff810e5ca0>] ? 
tick_sched_handle.isra.14+0x50/0x50
Jan 13 13:44:36 gamma kernel: [ 3277.552860]  [<ffffffff810d7632>] ? 
update_process_times+0x32/0x60
Jan 13 13:44:36 gamma kernel: [ 3277.552866]  [<ffffffff810e5c70>] ? 
tick_sched_handle.isra.14+0x20/0x50
Jan 13 13:44:36 gamma kernel: [ 3277.552872]  [<ffffffff810e5cdb>] ? 
tick_sched_timer+0x3b/0x70
Jan 13 13:44:36 gamma kernel: [ 3277.552878]  [<ffffffff810d7eaa>] ? 
__hrtimer_run_queues+0xea/0x230
Jan 13 13:44:36 gamma kernel: [ 3277.552884]  [<ffffffff810d85b9>] ? 
hrtimer_interrupt+0x99/0x190
Jan 13 13:44:36 gamma kernel: [ 3277.552891]  [<ffffffff81587c89>] ? 
smp_apic_timer_interrupt+0x39/0x50
Jan 13 13:44:36 gamma kernel: [ 3277.552898]  [<ffffffff81585b22>] ? 
apic_timer_interrupt+0x82/0x90
Jan 13 13:44:36 gamma kernel: [ 3277.552901]  <EOI>  [<ffffffff8119949b>] ? 
find_vmap_area+0x2b/0x60
Jan 13 13:44:36 gamma kernel: [ 3277.552913]  [<ffffffff81199485>] ? 
find_vmap_area+0x15/0x60
Jan 13 13:44:36 gamma kernel: [ 3277.552920]  [<ffffffff8119b8bc>] ? 
remove_vm_area+0xc/0x70
Jan 13 13:44:36 gamma kernel: [ 3277.552926]  [<ffffffff8119b941>] ? 
__vunmap+0x21/0xd0
Jan 13 13:44:36 gamma kernel: [ 3277.552965]  [<ffffffffa050deb0>] ? 
i915_parse_cmds+0x1f0/0x7f0 [i915]
Jan 13 13:44:36 gamma kernel: [ 3277.552997]  [<ffffffffa0511bf1>] ? 
i915_gem_do_execbuffer.isra.26+0x971/0x1130 [i915]
Jan 13 13:44:36 gamma kernel: [ 3277.553006]  [<ffffffff811e0b60>] ? 
poll_select_copy_remaining+0x150/0x150
Jan 13 13:44:36 gamma kernel: [ 3277.553035]  [<ffffffffa051351b>] ? 
i915_gem_execbuffer2+0xab/0x240 [i915]
Jan 13 13:44:36 gamma kernel: [ 3277.553056]  [<ffffffffa03cc260>] ? 
drm_ioctl+0x110/0x440 [drm]
Jan 13 13:44:36 gamma kernel: [ 3277.553083]  [<ffffffffa0513470>] ? 
i915_gem_execbuffer+0x320/0x320 [i915]
Jan 13 13:44:36 gamma kernel: [ 3277.553091]  [<ffffffff812e658e>] ? 
timerqueue_del+0x1e/0x60
Jan 13 13:44:36 gamma kernel: [ 3277.553097]  [<ffffffff810d7bc6>] ? 
__remove_hrtimer+0x36/0x90
Jan 13 13:44:36 gamma kernel: [ 3277.553103]  [<ffffffff811dfec5>] ? 
do_vfs_ioctl+0x2a5/0x490
Jan 13 13:44:36 gamma kernel: [ 3277.553110]  [<ffffffff810d9485>] ? 
SyS_setitimer+0xe5/0x120
Jan 13 13:44:36 gamma kernel: [ 3277.553115]  [<ffffffff811e0124>] ? 
SyS_ioctl+0x74/0x80
Jan 13 13:44:36 gamma kernel: [ 3277.553122]  [<ffffffff81584db2>] ? 
system_call_fast_compare_end+0xc/0x67
Jan 13 14:02:09 gamma kernel: [  805.373860] BUG: unable to handle kernel NULL 
pointer dereference at           (null)
Jan 13 14:02:09 gamma kernel: [  805.381206] IP: [<ffffffff812e3d62>] 
rb_erase+0x122/0x360
Jan 13 14:02:09 gamma kernel: [  805.384950] PGD 0 
Jan 13 14:02:09 gamma kernel: [  805.388636] Oops: 0002 [#1] SMP 
Jan 13 14:02:09 gamma kernel: [  805.392299] Modules linked in: quota_v2 
quota_tree dm_crypt sha256_ssse3 sha256_generic hmac drbg a
nsi_cprng xts gf128mul algif_skcipher af_alg dm_mod snd_hrtimer snd_seq_midi 
snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device c
pufreq_conservative cpufreq_stats cpufreq_userspace cpufreq_powersave 
binfmt_misc bnep hid_multitouch rtsx_usb_sdmmc rtsx_usb_ms mmc
_core memstick hid_sensor_incl_3d hid_sensor_accel_3d hid_sensor_gyro_3d 
hid_sensor_magn_3d hid_sensor_rotation hid_sensor_trigger h
id_sensor_iio_common industrialio_triggered_buffer kfifo_buf industrialio btusb 
btrtl btbcm r8723au(C) btintel cfg80211 bluetooth jo
ydev snd_hda_codec_hdmi iTCO_wdt snd_hda_codec_conexant iTCO_vendor_support 
snd_hda_codec_generic rtsx_usb intel_rapl iosf_mbi x86_p
kg_temp_thermal intel_powerclamp kvm crct10dif_pclmul snd_hda_intel 
snd_hda_codec crc32_pclmul snd_hda_core snd_hwdep snd_pcm_oss cr
yptd snd_mixer_oss i915 snd_pcm snd_timer psmouse snd i2c_i801 serio_raw mei_me 
soundcore sg mei ideapad_laptop sparse_keymap lpc_ic
h rfkill battery drm_kms_helper wmi drm video i2c_algo_bit ac int3400_thermal 
acpi_thermal_rel button ip6t_REJECT processor nf_rejec
t_ipv6 ip6table_filter ip6_tables ipt_REJECT nf_reject_ipv4 xt_tcpudp evdev 
xt_owner iptable_filter ip_tables x_tables uvcvideo vide
obuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media 
hid_sensor_hub mfd_core usbhid hid coretemp loop parport_pc
 ppdev lp parport autofs4 ext4 crc16 mbcache jbd2 sd_mod crc32c_intel ahci 
libahci libata xhci_pci scsi_mod ehci_pci xhci_hcd ehci_h
cd usbcore usb_common thermal
Jan 13 14:02:09 gamma kernel: [  805.400591] CPU: 0 PID: 2385 Comm: Xorg 
Tainted: G         C      4.3.0-1-amd64 #1 Debian 4.3.3-5
Jan 13 14:02:09 gamma kernel: [  805.400594] Hardware name: LENOVO 
2191/INVALID, BIOS 66CN54WW 01/21/2013
Jan 13 14:02:09 gamma kernel: [  805.400598] task: ffff8800c21aa240 ti: 
ffff8800c25dc000 task.ti: ffff8800c25dc000
Jan 13 14:02:09 gamma kernel: [  805.400601] RIP: 0010:[<ffffffff812e3d62>]  
[<ffffffff812e3d62>] rb_erase+0x122/0x360
Jan 13 14:02:09 gamma kernel: [  805.400614] RSP: 0018:ffff8800c25dfa68  
EFLAGS: 00010282
Jan 13 14:02:09 gamma kernel: [  805.400617] RAX: ffff8800c28e9dd8 RBX: 
ffff8800c28e90c0 RCX: ffff8800c28e9dd9
Jan 13 14:02:09 gamma kernel: [  805.400621] RDX: ffff880127951658 RSI: 
ffffffff81cef6f0 RDI: 0000000000000000
Jan 13 14:02:09 gamma kernel: [  805.400623] RBP: ffff8800c28e90d8 R08: 
ffff8800aca14658 R09: 0000000000000000
Jan 13 14:02:09 gamma kernel: [  805.400626] R10: ffff8800c28e91d8 R11: 
ffff88012f2168c8 R12: 0000000000000000
Jan 13 14:02:09 gamma kernel: [  805.400629] R13: ffff8800c25dfab0 R14: 
0000000000000000 R15: ffff8800c49e4460
Jan 13 14:02:09 gamma kernel: [  805.400634] FS:  00007fac30bcfa00(0000) 
GS:ffff88012f200000(0000) knlGS:0000000000000000
Jan 13 14:02:09 gamma kernel: [  805.400637] CS:  0010 DS: 0000 ES: 0000 CR0: 
0000000080050033
Jan 13 14:02:09 gamma kernel: [  805.400642] CR2: 0000000000000000 CR3: 
0000000129ac0000 CR4: 00000000001406f0
Jan 13 14:02:09 gamma kernel: [  805.400644] Stack:
Jan 13 14:02:09 gamma kernel: [  805.400646]  ffffffff811996cb ffff8800c28e91c0 
0000000000005aa2 ffffffff81199d33
Jan 13 14:02:09 gamma kernel: [  805.400654]  ffff8800c25dfb10 ffff8800c25dfb18 
ffffffff81a0cc98 000000000736d000
Jan 13 14:02:09 gamma kernel: [  805.400661]  ffffc9000736cfff ffff8800c47e5080 
ffff880093a52f80 ffffffff81a6ac10
Jan 13 14:02:09 gamma kernel: [  805.400668] Call Trace:
Jan 13 14:02:09 gamma kernel: [  805.400680]  [<ffffffff811996cb>] ? 
__free_vmap_area+0x4b/0xd0
Jan 13 14:02:09 gamma kernel: [  805.400689]  [<ffffffff81199d33>] ? 
__purge_vmap_area_lazy+0x323/0x380
Jan 13 14:02:09 gamma kernel: [  805.400698]  [<ffffffff81199f85>] ? 
free_vmap_area_noflush+0x95/0xa0
Jan 13 14:02:09 gamma kernel: [  805.400706]  [<ffffffff8119b90b>] ? 
remove_vm_area+0x5b/0x70
Jan 13 14:02:09 gamma kernel: [  805.400713]  [<ffffffff8119b941>] ? 
__vunmap+0x21/0xd0
Jan 13 14:02:09 gamma kernel: [  805.400775]  [<ffffffffa050f3f7>] ? 
i915_parse_cmds+0x737/0x7f0 [i915]
Jan 13 14:02:09 gamma kernel: [  805.400825]  [<ffffffffa0512bf1>] ? 
i915_gem_do_execbuffer.isra.26+0x971/0x1130 [i915]
Jan 13 14:02:09 gamma kernel: [  805.400835]  [<ffffffff811e0b60>] ? 
poll_select_copy_remaining+0x150/0x150
Jan 13 14:02:09 gamma kernel: [  805.400843]  [<ffffffff811e0b60>] ? 
poll_select_copy_remaining+0x150/0x150
Jan 13 14:02:09 gamma kernel: [  805.400887]  [<ffffffffa051451b>] ? 
i915_gem_execbuffer2+0xab/0x240 [i915]
Jan 13 14:02:09 gamma kernel: [  805.400935]  [<ffffffffa051e90b>] ? 
i915_gem_busy_ioctl+0x7b/0xb0 [i915]
Jan 13 14:02:09 gamma kernel: [  805.400966]  [<ffffffffa03b1260>] ? 
drm_ioctl+0x110/0x440 [drm]
Jan 13 14:02:09 gamma kernel: [  805.401011]  [<ffffffffa0514470>] ? 
i915_gem_execbuffer+0x320/0x320 [i915]
Jan 13 14:02:09 gamma kernel: [  805.401021]  [<ffffffff811dfec5>] ? 
do_vfs_ioctl+0x2a5/0x490
Jan 13 14:02:09 gamma kernel: [  805.401028]  [<ffffffff811e18e9>] ? 
SyS_select+0xc9/0x110
Jan 13 14:02:09 gamma kernel: [  805.401035]  [<ffffffff811e0124>] ? 
SyS_ioctl+0x74/0x80
Jan 13 14:02:09 gamma kernel: [  805.401056]  [<ffffffff81584db2>] ? 
system_call_fast_compare_end+0xc/0x67
Jan 13 14:02:09 gamma kernel: [  805.401059] Code: 02 00 00 48 85 d2 0f 84 e6 
01 00 00 31 c9 e9 82 00 00 00 f6 02 01 75 3a 48 8b 7a 10 48 89 c1 48 83 c9 01 
48 89 78 08 48 89 42 10 <48> 89 0f 48 8b 08 48 89 0a 48 83 e1 fc 48 89 10 0f 84 
e1 00 00 
Jan 13 14:02:09 gamma kernel: [  805.401137] RIP  [<ffffffff812e3d62>] 
rb_erase+0x122/0x360
Jan 13 14:02:09 gamma kernel: [  805.401145]  RSP <ffff8800c25dfa68>
Jan 13 14:02:09 gamma kernel: [  805.401147] CR2: 0000000000000000
Jan 13 14:02:09 gamma kernel: [  805.431836] ---[ end trace 9d30c43011b9ee07 
]---

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