Bug 112891

Summary: lightdm + light-locker locking results in kernel error in > 50% of cases
Product: Other Reporter: Johannes Wienke (languitar)
Component: OtherAssignee: other_other
Status: NEW ---    
Severity: normal CC: jprokop
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 4.4.1 Subsystem:
Regression: No Bisected commit-id:

Description Johannes Wienke 2016-02-22 17:19:48 UTC 
I am using lightdm as the login manager + light-locker for session locking. Since one of the recent upgrades of my archlinux x86_64 system I am constantly ending up in a black screen when trying to unlock the session (> 50% of the cases) with the kernel being tainted.

I am experiencing this on two separate laptops. One is an old Thinkpad x200s and the other is a macbook pro retina. Both have an intel graphics adapter. So maybe this is a relevant commonality.

Below are some dumps from the x200s system.

[  252.132051] ------------[ cut here ]------------
[  252.132081] WARNING: CPU: 1 PID: 506 at include/linux/kref.h:46 drm_framebuffer_reference+0x64/0x70 [drm]()
[  252.132169] Modules linked in: tun ctr ccm fuse uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common mousedev videodev media cdc_ether usbnet iTCO_wdt mii iTCO_vendor_support cdc_wdm cdc_acm btusb btrtl btbcm coretemp btintel bluetooth kvm_intel snd_hda_codec_conexant snd_hda_codec_generic arc4 iwldvm mac80211 kvm i915 evdev snd_hda_intel irqbypass input_leds psmouse snd_hda_codec mac_hid drm_kms_helper snd_hda_core serio_raw i2c_i801 lpc_ich snd_hwdep drm snd_pcm thinkpad_acpi iwlwifi e1000e ptp pps_core wmi cfg80211 nvram snd_timer shpchp snd syscopyarea thermal soundcore sysfillrect led_class sysimgblt battery mei_me mei ac fjes rfkill acpi_cpufreq fb_sys_fops intel_agp video i2c_algo_bit intel_gtt tpm_tis button tpm processor sch_fq_codel ip_tables x_tables ext4
[  252.132201]  crc16 mbcache jbd2 jitterentropy_rng sha256_ssse3 sha256_generic hmac drbg ansi_cprng xts gf128mul algif_skcipher af_alg dm_crypt dm_mod sd_mod atkbd libps2 ahci libahci ehci_pci uhci_hcd ehci_hcd ata_generic pata_acpi usbcore usb_common libata scsi_mod i8042 serio
[  252.132206] CPU: 1 PID: 506 Comm: Xorg Not tainted 4.4.1-2-ARCH #1
[  252.132208] Hardware name: LENOVO 74663RG/74663RG, BIOS 6DET44WW (2.08 ) 04/22/2009
[  252.132215]  0000000000000000 0000000023d39c57 ffff8800b5f3b920 ffffffff812c7f39
[  252.132219]  0000000000000000 ffff8800b5f3b958 ffffffff810765b2 ffff8800b5b76e40
[  252.132223]  ffff8800b560dcc0 ffff8800b560dcc0 ffff8800b6b6cc00 ffff880036fbd000
[  252.132225] Call Trace:
[  252.132236]  [<ffffffff812c7f39>] dump_stack+0x4b/0x72
[  252.132243]  [<ffffffff810765b2>] warn_slowpath_common+0x82/0xc0
[  252.132248]  [<ffffffff810766fa>] warn_slowpath_null+0x1a/0x20
[  252.132265]  [<ffffffffa044ce34>] drm_framebuffer_reference+0x64/0x70 [drm]
[  252.132278]  [<ffffffffa045e88d>] drm_atomic_set_fb_for_plane+0x2d/0x90 [drm]
[  252.132290]  [<ffffffffa04a8c5e>] __drm_atomic_helper_set_config+0xde/0x3c0 [drm_kms_helper]
[  252.132298]  [<ffffffffa04a9ca1>] restore_fbdev_mode+0x221/0x260 [drm_kms_helper]
[  252.132305]  [<ffffffffa04ac013>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
[  252.132312]  [<ffffffffa04ac08d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
[  252.132351]  [<ffffffffa059241a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[  252.132358]  [<ffffffff8133c49f>] ? fb_set_var+0x2ef/0x460
[  252.132361]  [<ffffffff8133c3e6>] fb_set_var+0x236/0x460
[  252.132367]  [<ffffffff810aa3ca>] ? check_preempt_wakeup+0xfa/0x210
[  252.132371]  [<ffffffff810a9ebd>] ? update_curr+0x7d/0x160
[  252.132379]  [<ffffffff8133308f>] fbcon_blank+0x30f/0x350
[  252.132384]  [<ffffffff8109e6a9>] ? ttwu_do_wakeup+0x19/0xe0
[  252.132392]  [<ffffffff813af743>] do_unblank_screen+0xc3/0x190
[  252.132399]  [<ffffffff813a56d9>] complete_change_console+0x59/0xe0
[  252.132403]  [<ffffffff813a5e70>] vt_ioctl+0x710/0x12e0
[  252.132419]  [<ffffffffa0447bf8>] ? drm_dropmaster_ioctl+0x68/0x80 [drm]
[  252.132432]  [<ffffffffa04437e9>] ? drm_ioctl+0x189/0x540 [drm]
[  252.132436]  [<ffffffff8139a061>] tty_ioctl+0x361/0xc20
[  252.132443]  [<ffffffff811de78c>] ? __vfs_write+0xcc/0x100
[  252.132448]  [<ffffffff811f0b68>] do_vfs_ioctl+0x298/0x480
[  252.132453]  [<ffffffff811fabe7>] ? __fget+0x77/0xb0
[  252.132457]  [<ffffffff811f0dc9>] SyS_ioctl+0x79/0x90
[  252.132463]  [<ffffffff81591b2e>] entry_SYSCALL_64_fastpath+0x12/0x71
[  252.132467] ---[ end trace 06aa9f4342873b1e ]---
[  252.132503] BUG: unable to handle kernel NULL pointer dereference at 0000000000000060
[  252.132536] IP: [<ffffffffa058891c>] intel_fb_obj_invalidate+0x1c/0xf0 [i915]
[  252.132541] PGD b7858067 PUD 36d0d067 PMD 0
[  252.132545] Oops: 0000 [#1] PREEMPT SMP
[  252.132612] Modules linked in: tun ctr ccm fuse uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common mousedev videodev media cdc_ether usbnet iTCO_wdt mii iTCO_vendor_support cdc_wdm cdc_acm btusb btrtl btbcm coretemp btintel bluetooth kvm_intel snd_hda_codec_conexant snd_hda_codec_generic arc4 iwldvm mac80211 kvm i915 evdev snd_hda_intel irqbypass input_leds psmouse snd_hda_codec mac_hid drm_kms_helper snd_hda_core serio_raw i2c_i801 lpc_ich snd_hwdep drm snd_pcm thinkpad_acpi iwlwifi e1000e ptp pps_core wmi cfg80211 nvram snd_timer shpchp snd syscopyarea thermal soundcore sysfillrect led_class sysimgblt battery mei_me mei ac fjes rfkill acpi_cpufreq fb_sys_fops intel_agp video i2c_algo_bit intel_gtt tpm_tis button tpm processor sch_fq_codel ip_tables x_tables ext4
[  252.132635]  crc16 mbcache jbd2 jitterentropy_rng sha256_ssse3 sha256_generic hmac drbg ansi_cprng xts gf128mul algif_skcipher af_alg dm_crypt dm_mod sd_mod atkbd libps2 ahci libahci ehci_pci uhci_hcd ehci_hcd ata_generic pata_acpi usbcore usb_common libata scsi_mod i8042 serio
[  252.132639] CPU: 1 PID: 506 Comm: Xorg Tainted: G        W       4.4.1-2-ARCH #1
[  252.132641] Hardware name: LENOVO 74663RG/74663RG, BIOS 6DET44WW (2.08 ) 04/22/2009
[  252.132644] task: ffff880036802640 ti: ffff8800b5f38000 task.ti: ffff8800b5f38000
[  252.132678] RIP: 0010:[<ffffffffa058891c>]  [<ffffffffa058891c>] intel_fb_obj_invalidate+0x1c/0xf0 [i915]
[  252.132681] RSP: 0018:ffff8800b5f3ba58  EFLAGS: 00010246
[  252.132683] RAX: ffff880036802640 RBX: ffff8800b5dc8800 RCX: 0000000001d89a01
[  252.132685] RDX: ffff8800b5b76e40 RSI: 0000000000000000 RDI: ffff8800b5dc8800
[  252.132687] RBP: ffff8800b5f3ba80 R08: 0000000000018ac0 R09: ffffffffa045ccf6
[  252.132689] R10: ffffea0004d9d240 R11: ffff880135ac6540 R12: 0000000000000000
[  252.132691] R13: 0000000000000000 R14: 0000000000200001 R15: 0000000000000080
[  252.132694] FS:  00007f18ad8e2940(0000) GS:ffff88013bc80000(0000) knlGS:0000000000000000
[  252.132697] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  252.132699] CR2: 0000000000000060 CR3: 0000000135d8a000 CR4: 00000000000406e0
[  252.132701] Stack:
[  252.132706]  ffff880136134900 ffff8800b65ad000 0000000000000000 0000000000200001
[  252.132710]  0000000000000080 ffff8800b5f3baa0 ffffffffa0592443 000000008133c49f
[  252.132714]  ffff8800b5f3bc48 ffff8800b5f3bc18 ffffffff8133c3e6 ffff8800b65ad060
[  252.132715] Call Trace:
[  252.132746]  [<ffffffffa0592443>] intel_fbdev_set_par+0x43/0x60 [i915]
[  252.132750]  [<ffffffff8133c3e6>] fb_set_var+0x236/0x460
[  252.132756]  [<ffffffff810aa3ca>] ? check_preempt_wakeup+0xfa/0x210
[  252.132759]  [<ffffffff810a9ebd>] ? update_curr+0x7d/0x160
[  252.132766]  [<ffffffff8133308f>] fbcon_blank+0x30f/0x350
[  252.132770]  [<ffffffff8109e6a9>] ? ttwu_do_wakeup+0x19/0xe0
[  252.132776]  [<ffffffff813af743>] do_unblank_screen+0xc3/0x190
[  252.132781]  [<ffffffff813a56d9>] complete_change_console+0x59/0xe0
[  252.132786]  [<ffffffff813a5e70>] vt_ioctl+0x710/0x12e0
[  252.132802]  [<ffffffffa0447bf8>] ? drm_dropmaster_ioctl+0x68/0x80 [drm]
[  252.132815]  [<ffffffffa04437e9>] ? drm_ioctl+0x189/0x540 [drm]
[  252.132818]  [<ffffffff8139a061>] tty_ioctl+0x361/0xc20
[  252.132824]  [<ffffffff811de78c>] ? __vfs_write+0xcc/0x100
[  252.132828]  [<ffffffff811f0b68>] do_vfs_ioctl+0x298/0x480
[  252.132832]  [<ffffffff811fabe7>] ? __fget+0x77/0xb0
[  252.132836]  [<ffffffff811f0dc9>] SyS_ioctl+0x79/0x90
[  252.132840]  [<ffffffff81591b2e>] entry_SYSCALL_64_fastpath+0x12/0x71
[  252.132883] Code: 41 5f 5d c3 90 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 41 89 f5 53 4c 8b 67 08 48 89 fb <41> 8b 44 24 60 4d 8b 74 24 28 83 f8 01 74 58 8b b3 5c 01 00 00
[  252.132916] RIP  [<ffffffffa058891c>] intel_fb_obj_invalidate+0x1c/0xf0 [i915]
[  252.132917]  RSP <ffff8800b5f3ba58>
[  252.132918] CR2: 0000000000000060
[  252.132921] ---[ end trace 06aa9f4342873b1f ]---

languitar@milt ~ $ uname -a
Linux milt 4.4.1-2-ARCH #1 SMP PREEMPT Wed Feb 3 13:12:33 UTC 2016 x86_64 GNU/Linux

languitar@milt ~ $ lspci
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:02.1 Display controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
00:03.0 Communication controller: Intel Corporation Mobile 4 Series Chipset MEI Controller (rev 07)
00:03.2 IDE interface: Intel Corporation Mobile 4 Series Chipset PT IDER Controller (rev 07)
00:03.3 Serial controller: Intel Corporation Mobile 4 Series Chipset AMT SOL Redirection (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.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 03)
00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (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)
03:00.0 Network controller: Intel Corporation Ultimate N WiFi Link 5300
04:00.0 Memory controller: Intel Corporation Turbo Memory Controller (rev 11)

00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07) (prog-if 00 [VGA controller])
	Subsystem: Lenovo Device 20e4
	Flags: bus master, fast devsel, latency 0, IRQ 33
	Memory at f2000000 (64-bit, non-prefetchable) [size=4M]
	Memory at d0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 1800 [size=8]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: <access denied>
	Kernel driver in use: i915
	Kernel modules: i915

languitar@milt ~ $ lsmod
Module                  Size  Used by
tun                    28672  2
ctr                    16384  2
ccm                    20480  2
fuse                   90112  3
uvcvideo               86016  0
videobuf2_vmalloc      16384  1 uvcvideo
videobuf2_memops       16384  1 videobuf2_vmalloc
videobuf2_v4l2         24576  1 uvcvideo
videobuf2_core         32768  2 uvcvideo,videobuf2_v4l2
v4l2_common            16384  1 videobuf2_v4l2
mousedev               20480  0
videodev              147456  4 uvcvideo,v4l2_common,videobuf2_core,videobuf2_v4l2
media                  20480  2 uvcvideo,videodev
cdc_ether              16384  0
usbnet                 36864  1 cdc_ether
iTCO_wdt               16384  0
mii                    16384  1 usbnet
iTCO_vendor_support    16384  1 iTCO_wdt
cdc_wdm                20480  0
cdc_acm                32768  0
btusb                  40960  0
btrtl                  16384  1 btusb
btbcm                  16384  1 btusb
coretemp               16384  0
btintel                16384  1 btusb
bluetooth             450560  4 btbcm,btrtl,btusb,btintel
kvm_intel             167936  0
snd_hda_codec_conexant    24576  1
snd_hda_codec_generic    65536  1 snd_hda_codec_conexant
arc4                   16384  2
iwldvm                180224  0
mac80211              643072  1 iwldvm
kvm                   462848  1 kvm_intel
i915                 1134592  4
evdev                  24576  5
snd_hda_intel          32768  1
irqbypass              16384  1 kvm
input_leds             16384  0
psmouse               118784  0
snd_hda_codec         106496  3 snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_intel
mac_hid                16384  0
drm_kms_helper        106496  1 i915
snd_hda_core           49152  4 snd_hda_codec_conexant,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
serio_raw              16384  0
i2c_i801               20480  0
lpc_ich                24576  0
snd_hwdep              16384  1 snd_hda_codec
drm                   286720  6 i915,drm_kms_helper
snd_pcm                86016  3 snd_hda_codec,snd_hda_intel,snd_hda_core
thinkpad_acpi          73728  0
iwlwifi               163840  1 iwldvm
e1000e                217088  0
ptp                    20480  1 e1000e
pps_core               20480  1 ptp
wmi                    20480  0
cfg80211              475136  3 iwlwifi,mac80211,iwldvm
nvram                  16384  1 thinkpad_acpi
snd_timer              28672  1 snd_pcm
shpchp                 32768  0
snd                    65536  10 snd_hwdep,snd_timer,snd_hda_codec_conexant,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,thinkpad_acpi
syscopyarea            16384  1 drm_kms_helper
thermal                20480  0
soundcore              16384  1 snd
sysfillrect            16384  1 drm_kms_helper
led_class              16384  3 iwldvm,thinkpad_acpi,input_leds
sysimgblt              16384  1 drm_kms_helper
battery                20480  0
mei_me                 32768  0
mei                    81920  1 mei_me
ac                     16384  0
fjes                   28672  0
rfkill                 20480  5 cfg80211,thinkpad_acpi,bluetooth
acpi_cpufreq           20480  1
fb_sys_fops            16384  1 drm_kms_helper
intel_agp              20480  0
video                  36864  2 i915,thinkpad_acpi
i2c_algo_bit           16384  1 i915
intel_gtt              20480  3 i915,intel_agp
tpm_tis                20480  0
button                 16384  1 i915
tpm                    36864  1 tpm_tis
processor              32768  3 acpi_cpufreq
sch_fq_codel           20480  6
ip_tables              28672  0
x_tables               28672  1 ip_tables
ext4                  512000  3
crc16                  16384  2 ext4,bluetooth
mbcache                20480  1 ext4
jbd2                   90112  1 ext4
jitterentropy_rng      16384  0
sha256_ssse3           32768  1
sha256_generic         24576  1 sha256_ssse3
hmac                   16384  1
drbg                   32768  1
ansi_cprng             16384  0
xts                    16384  1
gf128mul               16384  1 xts
algif_skcipher         20480  0
af_alg                 16384  1 algif_skcipher
dm_crypt               28672  1
dm_mod                102400  12 dm_crypt
sd_mod                 36864  3
atkbd                  24576  0
libps2                 16384  2 atkbd,psmouse
ahci                   36864  2
libahci                28672  1 ahci
ehci_pci               16384  0
uhci_hcd               45056  0
ehci_hcd               69632  1 ehci_pci
ata_generic            16384  0
pata_acpi              16384  0
usbcore               196608  9 btusb,uhci_hcd,uvcvideo,ehci_hcd,ehci_pci,usbnet,cdc_acm,cdc_wdm,cdc_ether
usb_common             16384  1 usbcore
libata                196608  4 ahci,pata_acpi,libahci,ata_generic
scsi_mod              151552  2 libata,sd_mod
i8042                  24576  1 libps2
serio                  20480  6 serio_raw,atkbd,i8042,psmouse
Comment 1 Jiri Prokop 2016-03-11 17:35:06 UTC 
I have exactly the same problem for a few months now. I'm also using LightDM with LightLocker on Antergos linux.

One thing helped me though, setting AccelMethod to uxa, according to this Wiki article: https://wiki.archlinux.org/index.php/Intel_graphics#SNA_issues