[Bug 69875] New: [i915] kernel 3.11.2 intel_pipe_config_compare ERROR

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Sep 27 01:43:45 PDT 2013 

https://bugs.freedesktop.org/show_bug.cgi?id=69875

          Priority: medium
            Bug ID: 69875
          Assignee: chris at chris-wilson.co.uk
           Summary: [i915] kernel 3.11.2 intel_pipe_config_compare ERROR
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: carstenmattner at gmail.com
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
           Product: xorg

After the update to 3.11.2 new ERROR messages appeared on bootup:

[    0.000000] Linux version 3.11.2-1-ARCH (tobias at testing-i686) (gcc version
4.8.1 20130725 (prerelease) (GCC) ) #1 SMP PREEMPT Fri Sep 27 08:03:21 CEST
2013

...

[   16.922234] [drm:intel_pipe_config_compare] *ERROR* mismatch in
adjusted_mode.flags (expected 2, found 0)
[   16.922244] ------------[ cut here ]------------
[   16.922282] WARNING: CPU: 1 PID: 171 at
drivers/gpu/drm/i915/intel_display.c:8299 check_crtc_state+0x590/0xb30 [i915]()
[   16.922285] pipe state doesn't match!
[   16.922287] Modules linked in: microcode(+) iTCO_vendor_support ath5k(+)
evdev i2c_i801(+) input_polldev pcspkr ath of_i2c joydev snd_hda_codec_idt
mac80211 i915(+) sky2 cfg80211 snd_hda_intel rfkill snd_hda_codec
drm_kms_helper snd_hwdep drm snd_pcm i2c_algo_bit snd_page_alloc i2c_core
snd_timer snd soundcore lpc_ich video shpchp intel_agp intel_gtt agpgart button
acpi_cpufreq mperf processor ext4 crc16 mbcache jbd2 xts gf128mul hid_appleir
hid_generic hid_cherry usbhid hid dm_crypt dm_mod usb_storage sd_mod sr_mod
cdrom ata_generic pata_acpi ata_piix libata firewire_ohci scsi_mod
firewire_core crc_itu_t ehci_pci uhci_hcd ehci_hcd usbcore usb_common
[   16.922341] CPU: 1 PID: 171 Comm: systemd-udevd Not tainted 3.11.2-1-ARCH #1
[   16.922343] Hardware name: Apple Inc. Macmini2,1
[   16.922346]  00000000 00000000 f6ef55e8 c141bc5f f6ef5628 f6ef5618 c104560e
f8f74959
[   16.922353]  f6ef5644 000000ab f8f6c3b4 0000206b f8f28240 f8f28240 f53ff650
f53ff000
[   16.922360]  0000000a f6ef5630 c1045663 00000009 f6ef5628 f8f74959 f6ef5644
f6ef5898
[   16.922367] Call Trace:
[   16.922375]  [<c141bc5f>] dump_stack+0x4b/0x79
[   16.922381]  [<c104560e>] warn_slowpath_common+0x7e/0xa0
[   16.922409]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   16.922435]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   16.922440]  [<c1045663>] warn_slowpath_fmt+0x33/0x40
[   16.922467]  [<f8f28240>] check_crtc_state+0x590/0xb30 [i915]
[   16.922498]  [<f8f31e83>] intel_modeset_check_state+0x2a3/0x760 [i915]
[   16.922526]  [<f8f323d0>] intel_set_mode+0x30/0x40 [i915]
[   16.922553]  [<f8f334e0>] intel_get_load_detect_pipe+0x230/0x3a0 [i915]
[   16.922588]  [<f8f52857>] intel_tv_detect+0xe7/0x4a0 [i915]
[   16.922596]  [<f86b2448>]
drm_helper_probe_single_connector_modes+0x1b8/0x340 [drm_kms_helper]
[   16.922602]  [<f86b0001>]
drm_fb_helper_probe_connector_modes.isra.3+0x41/0x60 [drm_kms_helper]
[   16.922608]  [<f86b0e6d>] drm_fb_helper_initial_config+0x15d/0x480
[drm_kms_helper]
[   16.922631]  [<f8f0236f>] ? i915_write32+0x9f/0x180 [i915]
[   16.922653]  [<f8f01d86>] ? i915_read32+0x56/0x150 [i915]
[   16.922685]  [<f8f5196e>] intel_fbdev_initial_config+0x1e/0x20 [i915]
[   16.922708]  [<f8f05de2>] i915_driver_load+0xcb2/0xce0 [i915]
[   16.922730]  [<f8f02f20>] ? i915_switcheroo_set_state+0xa0/0xa0 [i915]
[   16.922747]  [<f86cd39e>] ? drm_get_minor+0x1be/0x240 [drm]
[   16.922757]  [<f86cf0e3>] drm_get_pci_dev+0x133/0x240 [drm]
[   16.922780]  [<f8f0169b>] i915_pci_probe+0x2b/0x60 [i915]
[   16.922786]  [<c124099f>] pci_device_probe+0x6f/0xb0
[   16.922792]  [<c12e57c9>] driver_probe_device+0x79/0x360
[   16.922796]  [<c12e5b61>] __driver_attach+0x71/0x80
[   16.922800]  [<c12e5af0>] ? __device_attach+0x40/0x40
[   16.922804]  [<c12e3bd7>] bus_for_each_dev+0x47/0x80
[   16.922807]  [<c12e52be>] driver_attach+0x1e/0x20
[   16.922811]  [<c12e5af0>] ? __device_attach+0x40/0x40
[   16.922815]  [<c12e4ef7>] bus_add_driver+0x1c7/0x280
[   16.922819]  [<c12409e0>] ? pci_device_probe+0xb0/0xb0
[   16.922823]  [<c12409e0>] ? pci_device_probe+0xb0/0xb0
[   16.922827]  [<c12e613a>] driver_register+0x6a/0x130
[   16.922831]  [<c1240832>] __pci_register_driver+0x32/0x40
[   16.922840]  [<f86cf2e5>] drm_pci_init+0xf5/0x100 [drm]
[   16.922846]  [<f896d000>] ? 0xf896cfff
[   16.922867]  [<f896d05e>] i915_init+0x5e/0x60 [i915]
[   16.922872]  [<c100042a>] do_one_initcall+0xca/0x190
[   16.922877]  [<c10cbfc7>] ? tracepoint_update_probe_range+0x47/0x130
[   16.922882]  [<c141f12d>] ? mutex_unlock+0xd/0x10
[   16.922886]  [<c10cc989>] ? tracepoint_module_notify+0x119/0x180
[   16.922890]  [<c14251a1>] ? notifier_call_chain+0x41/0x60
[   16.922896]  [<c10675c4>] ? __blocking_notifier_call_chain+0x44/0x60
[   16.922902]  [<c10a6a81>] load_module+0x19f1/0x2300
[   16.922910]  [<c10a741f>] SyS_init_module+0x8f/0xf0
[   16.922918]  [<c142850d>] sysenter_do_call+0x12/0x28
[   16.922920] ---[ end trace a8bb9aa7d94acce1 ]---
[   16.940334] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.10

...

[   66.003042] [drm:intel_pipe_config_compare] *ERROR* mismatch in
adjusted_mode.flags (expected 2, found 0)
[   66.003048] ------------[ cut here ]------------
[   66.003075] WARNING: CPU: 1 PID: 289 at
drivers/gpu/drm/i915/intel_display.c:8299 check_crtc_state+0x590/0xb30 [i915]()
[   66.003078] pipe state doesn't match!
[   66.003079] Modules linked in: arc4 coretemp kvm_intel kvm iTCO_wdt applesmc
microcode iTCO_vendor_support ath5k evdev i2c_i801 input_polldev pcspkr ath
of_i2c joydev snd_hda_codec_idt mac80211 i915 sky2 cfg80211 snd_hda_intel
rfkill snd_hda_codec drm_kms_helper snd_hwdep drm snd_pcm i2c_algo_bit
snd_page_alloc i2c_core snd_timer snd soundcore lpc_ich video shpchp intel_agp
intel_gtt agpgart button acpi_cpufreq mperf processor ext4 crc16 mbcache jbd2
xts gf128mul hid_appleir hid_generic hid_cherry usbhid hid dm_crypt dm_mod
usb_storage sd_mod sr_mod cdrom ata_generic pata_acpi ata_piix libata
firewire_ohci scsi_mod firewire_core crc_itu_t ehci_pci uhci_hcd ehci_hcd
usbcore usb_common
[   66.003142] CPU: 1 PID: 289 Comm: X Tainted: G        W    3.11.2-1-ARCH #1
[   66.003144] Hardware name: Apple Inc. Macmini2,1
[   66.003147]  00000000 00000000 f6f598b0 c141bc5f f6f598f0 f6f598e0 c104560e
f8f74959
[   66.003154]  f6f5990c 00000121 f8f6c3b4 0000206b f8f28240 f8f28240 f5016650
f5016000
[   66.003161]  0000000a f6f598f8 c1045663 00000009 f6f598f0 f8f74959 f6f5990c
f6f59b60
[   66.003168] Call Trace:
[   66.003176]  [<c141bc5f>] dump_stack+0x4b/0x79
[   66.003182]  [<c104560e>] warn_slowpath_common+0x7e/0xa0
[   66.003197]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   66.003211]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   66.003216]  [<c1045663>] warn_slowpath_fmt+0x33/0x40
[   66.003230]  [<f8f28240>] check_crtc_state+0x590/0xb30 [i915]
[   66.003248]  [<f8f31e83>] intel_modeset_check_state+0x2a3/0x760 [i915]
[   66.003264]  [<f8f323d0>] intel_set_mode+0x30/0x40 [i915]
[   66.003278]  [<f8f334e0>] intel_get_load_detect_pipe+0x230/0x3a0 [i915]
[   66.003298]  [<f8c157f4>] ? __ext4_handle_dirty_metadata+0x64/0x130 [ext4]
[   66.003314]  [<f8f52857>] intel_tv_detect+0xe7/0x4a0 [i915]
[   66.003322]  [<f8b1a13f>] ? jbd2_journal_stop+0x24f/0x3e0 [jbd2]
[   66.003329]  [<f86b2448>]
drm_helper_probe_single_connector_modes+0x1b8/0x340 [drm_kms_helper]
[   66.003361]  [<f86d4fe5>] drm_mode_getconnector+0x305/0x350 [drm]
[   66.003370]  [<c1101c3f>] ? __generic_file_aio_write+0x1ef/0x460
[   66.003381]  [<f86d4ce0>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   66.003389]  [<f86c7c5a>] drm_ioctl+0x49a/0x540 [drm]
[   66.003400]  [<f8be5300>] ? ext4_file_write+0xd0/0x470 [ext4]
[   66.003409]  [<f86d4ce0>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   66.003417]  [<c1152421>] ? do_sync_write+0x61/0x90
[   66.003425]  [<f86c77c0>] ? drm_copy_field+0x70/0x70 [drm]
[   66.003429]  [<c1162446>] do_vfs_ioctl+0x2e6/0x4e0
[   66.003434]  [<c11548d1>] ? __sb_end_write+0x31/0x70
[   66.003438]  [<c1152cd5>] ? vfs_write+0x185/0x1c0
[   66.003442]  [<c11626bf>] SyS_ioctl+0x7f/0x90
[   66.003448]  [<c142850d>] sysenter_do_call+0x12/0x28
[   66.003459] ---[ end trace a8bb9aa7d94acce2 ]---
[   66.186347] [drm:intel_pipe_config_compare] *ERROR* mismatch in
adjusted_mode.flags (expected 2, found 0)
[   66.186355] ------------[ cut here ]------------
[   66.186385] WARNING: CPU: 1 PID: 289 at
drivers/gpu/drm/i915/intel_display.c:8299 check_crtc_state+0x590/0xb30 [i915]()
[   66.186388] pipe state doesn't match!
[   66.186390] Modules linked in: arc4 coretemp kvm_intel kvm iTCO_wdt applesmc
microcode iTCO_vendor_support ath5k evdev i2c_i801 input_polldev pcspkr ath
of_i2c joydev snd_hda_codec_idt mac80211 i915 sky2 cfg80211 snd_hda_intel
rfkill snd_hda_codec drm_kms_helper snd_hwdep drm snd_pcm i2c_algo_bit
snd_page_alloc i2c_core snd_timer snd soundcore lpc_ich video shpchp intel_agp
intel_gtt agpgart button acpi_cpufreq mperf processor ext4 crc16 mbcache jbd2
xts gf128mul hid_appleir hid_generic hid_cherry usbhid hid dm_crypt dm_mod
usb_storage sd_mod sr_mod cdrom ata_generic pata_acpi ata_piix libata
firewire_ohci scsi_mod firewire_core crc_itu_t ehci_pci uhci_hcd ehci_hcd
usbcore usb_common
[   66.186452] CPU: 1 PID: 289 Comm: X Tainted: G        W    3.11.2-1-ARCH #1
[   66.186455] Hardware name: Apple Inc. Macmini2,1
[   66.186457]  00000000 00000000 f6f598b0 c141bc5f f6f598f0 f6f598e0 c104560e
f8f74959
[   66.186464]  f6f5990c 00000121 f8f6c3b4 0000206b f8f28240 f8f28240 f5016650
f5016000
[   66.186471]  0000000a f6f598f8 c1045663 00000009 f6f598f0 f8f74959 f6f5990c
f6f59b60
[   66.186477] Call Trace:
[   66.186485]  [<c141bc5f>] dump_stack+0x4b/0x79
[   66.186492]  [<c104560e>] warn_slowpath_common+0x7e/0xa0
[   66.186507]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   66.186521]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   66.186525]  [<c1045663>] warn_slowpath_fmt+0x33/0x40
[   66.186539]  [<f8f28240>] check_crtc_state+0x590/0xb30 [i915]
[   66.186557]  [<f8f31e83>] intel_modeset_check_state+0x2a3/0x760 [i915]
[   66.186573]  [<f8f323d0>] intel_set_mode+0x30/0x40 [i915]
[   66.186588]  [<f8f334e0>] intel_get_load_detect_pipe+0x230/0x3a0 [i915]
[   66.186594]  [<c141f12d>] ? mutex_unlock+0xd/0x10
[   66.186608]  [<f8f3246d>] ? intel_release_load_detect_pipe+0x8d/0xf0 [i915]
[   66.186625]  [<f8f52857>] intel_tv_detect+0xe7/0x4a0 [i915]
[   66.186633]  [<f86b2448>]
drm_helper_probe_single_connector_modes+0x1b8/0x340 [drm_kms_helper]
[   66.186647]  [<f86d4fe5>] drm_mode_getconnector+0x305/0x350 [drm]
[   66.186657]  [<f86d4ce0>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   66.186665]  [<f86c7c5a>] drm_ioctl+0x49a/0x540 [drm]
[   66.186697]  [<f8be5300>] ? ext4_file_write+0xd0/0x470 [ext4]
[   66.186708]  [<f86d4ce0>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   66.186715]  [<c1152421>] ? do_sync_write+0x61/0x90
[   66.186723]  [<f86c77c0>] ? drm_copy_field+0x70/0x70 [drm]
[   66.186727]  [<c1162446>] do_vfs_ioctl+0x2e6/0x4e0
[   66.186731]  [<c11548d1>] ? __sb_end_write+0x31/0x70
[   66.186735]  [<c1152cd5>] ? vfs_write+0x185/0x1c0
[   66.186739]  [<c11626bf>] SyS_ioctl+0x7f/0x90
[   66.186746]  [<c142850d>] sysenter_do_call+0x12/0x28
[   66.186749] ---[ end trace a8bb9aa7d94acce3 ]---
[   66.689791] [drm:intel_pipe_config_compare] *ERROR* mismatch in
adjusted_mode.flags (expected 2, found 0)
[   66.689796] ------------[ cut here ]------------
[   66.689813] WARNING: CPU: 0 PID: 289 at
drivers/gpu/drm/i915/intel_display.c:8299 check_crtc_state+0x590/0xb30 [i915]()
[   66.689815] pipe state doesn't match!
[   66.689817] Modules linked in: arc4 coretemp kvm_intel kvm iTCO_wdt applesmc
microcode iTCO_vendor_support ath5k evdev i2c_i801 input_polldev pcspkr ath
of_i2c joydev snd_hda_codec_idt mac80211 i915 sky2 cfg80211 snd_hda_intel
rfkill snd_hda_codec drm_kms_helper snd_hwdep drm snd_pcm i2c_algo_bit
snd_page_alloc i2c_core snd_timer snd soundcore lpc_ich video shpchp intel_agp
intel_gtt agpgart button acpi_cpufreq mperf processor ext4 crc16 mbcache jbd2
xts gf128mul hid_appleir hid_generic hid_cherry usbhid hid dm_crypt dm_mod
usb_storage sd_mod sr_mod cdrom ata_generic pata_acpi ata_piix libata
firewire_ohci scsi_mod firewire_core crc_itu_t ehci_pci uhci_hcd ehci_hcd
usbcore usb_common
[   66.689874] CPU: 0 PID: 289 Comm: X Tainted: G        W    3.11.2-1-ARCH #1
[   66.689876] Hardware name: Apple Inc. Macmini2,1
[   66.689878]  00000000 00000000 f6f598b0 c141bc5f f6f598f0 f6f598e0 c104560e
f8f74959
[   66.689885]  f6f5990c 00000121 f8f6c3b4 0000206b f8f28240 f8f28240 f5016650
f5016000
[   66.689892]  0000000a f6f598f8 c1045663 00000009 f6f598f0 f8f74959 f6f5990c
f6f59b60
[   66.689898] Call Trace:
[   66.689904]  [<c141bc5f>] dump_stack+0x4b/0x79
[   66.689909]  [<c104560e>] warn_slowpath_common+0x7e/0xa0
[   66.689923]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   66.689937]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   66.689941]  [<c1045663>] warn_slowpath_fmt+0x33/0x40
[   66.689956]  [<f8f28240>] check_crtc_state+0x590/0xb30 [i915]
[   66.689973]  [<f8f31e83>] intel_modeset_check_state+0x2a3/0x760 [i915]
[   66.689989]  [<f8f323d0>] intel_set_mode+0x30/0x40 [i915]
[   66.689998]  [<f8f334e0>] intel_get_load_detect_pipe+0x230/0x3a0 [i915]
[   66.690035]  [<f8c157f4>] ? __ext4_handle_dirty_metadata+0x64/0x130 [ext4]
[   66.690053]  [<f8f52857>] intel_tv_detect+0xe7/0x4a0 [i915]
[   66.690062]  [<f8b1a13f>] ? jbd2_journal_stop+0x24f/0x3e0 [jbd2]
[   66.690069]  [<f86b2448>]
drm_helper_probe_single_connector_modes+0x1b8/0x340 [drm_kms_helper]
[   66.690080]  [<f86d4fe5>] drm_mode_getconnector+0x305/0x350 [drm]
[   66.690087]  [<c1101c3f>] ? __generic_file_aio_write+0x1ef/0x460
[   66.690096]  [<f86d4ce0>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   66.690103]  [<f86c7c5a>] drm_ioctl+0x49a/0x540 [drm]
[   66.690114]  [<f8be5300>] ? ext4_file_write+0xd0/0x470 [ext4]
[   66.690123]  [<f86d4ce0>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   66.690129]  [<c1152421>] ? do_sync_write+0x61/0x90
[   66.690136]  [<f86c77c0>] ? drm_copy_field+0x70/0x70 [drm]
[   66.690140]  [<c1162446>] do_vfs_ioctl+0x2e6/0x4e0
[   66.690144]  [<c11548d1>] ? __sb_end_write+0x31/0x70
[   66.690148]  [<c1152cd5>] ? vfs_write+0x185/0x1c0
[   66.690152]  [<c11626bf>] SyS_ioctl+0x7f/0x90
[   66.690157]  [<c142850d>] sysenter_do_call+0x12/0x28
[   66.690160] ---[ end trace a8bb9aa7d94acce4 ]---
[   66.893039] [drm:intel_pipe_config_compare] *ERROR* mismatch in
adjusted_mode.flags (expected 2, found 0)
[   66.893042] ------------[ cut here ]------------
[   66.893058] WARNING: CPU: 1 PID: 289 at
drivers/gpu/drm/i915/intel_display.c:8299 check_crtc_state+0x590/0xb30 [i915]()
[   66.893060] pipe state doesn't match!
[   66.893062] Modules linked in: arc4 coretemp kvm_intel kvm iTCO_wdt applesmc
microcode iTCO_vendor_support ath5k evdev i2c_i801 input_polldev pcspkr ath
of_i2c joydev snd_hda_codec_idt mac80211 i915 sky2 cfg80211 snd_hda_intel
rfkill snd_hda_codec drm_kms_helper snd_hwdep drm snd_pcm i2c_algo_bit
snd_page_alloc i2c_core snd_timer snd soundcore lpc_ich video shpchp intel_agp
intel_gtt agpgart button acpi_cpufreq mperf processor ext4 crc16 mbcache jbd2
xts gf128mul hid_appleir hid_generic hid_cherry usbhid hid dm_crypt dm_mod
usb_storage sd_mod sr_mod cdrom ata_generic pata_acpi ata_piix libata
firewire_ohci scsi_mod firewire_core crc_itu_t ehci_pci uhci_hcd ehci_hcd
usbcore usb_common
[   66.893116] CPU: 1 PID: 289 Comm: X Tainted: G        W    3.11.2-1-ARCH #1
[   66.893119] Hardware name: Apple Inc. Macmini2,1
[   66.893121]  00000000 00000000 f6f598b0 c141bc5f f6f598f0 f6f598e0 c104560e
f8f74959
[   66.893128]  f6f5990c 00000121 f8f6c3b4 0000206b f8f28240 f8f28240 f5016650
f5016000
[   66.893135]  0000000a f6f598f8 c1045663 00000009 f6f598f0 f8f74959 f6f5990c
f6f59b60
[   66.893141] Call Trace:
[   66.893146]  [<c141bc5f>] dump_stack+0x4b/0x79
[   66.893151]  [<c104560e>] warn_slowpath_common+0x7e/0xa0
[   66.893165]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   66.893179]  [<f8f28240>] ? check_crtc_state+0x590/0xb30 [i915]
[   66.893184]  [<c1045663>] warn_slowpath_fmt+0x33/0x40
[   66.893198]  [<f8f28240>] check_crtc_state+0x590/0xb30 [i915]
[   66.893215]  [<f8f31e83>] intel_modeset_check_state+0x2a3/0x760 [i915]
[   66.893231]  [<f8f323d0>] intel_set_mode+0x30/0x40 [i915]
[   66.893245]  [<f8f334e0>] intel_get_load_detect_pipe+0x230/0x3a0 [i915]
[   66.893251]  [<c141f12d>] ? mutex_unlock+0xd/0x10
[   66.893265]  [<f8f3246d>] ? intel_release_load_detect_pipe+0x8d/0xf0 [i915]
[   66.893281]  [<f8f52857>] intel_tv_detect+0xe7/0x4a0 [i915]
[   66.893289]  [<f86b2448>]
drm_helper_probe_single_connector_modes+0x1b8/0x340 [drm_kms_helper]
[   66.893300]  [<f86d4fe5>] drm_mode_getconnector+0x305/0x350 [drm]
[   66.893310]  [<f86d4ce0>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   66.893317]  [<f86c7c5a>] drm_ioctl+0x49a/0x540 [drm]
[   66.893328]  [<f8be5300>] ? ext4_file_write+0xd0/0x470 [ext4]
[   66.893351]  [<f86d4ce0>] ? drm_mode_getcrtc+0xc0/0xc0 [drm]
[   66.893359]  [<c1152421>] ? do_sync_write+0x61/0x90
[   66.893366]  [<f86c77c0>] ? drm_copy_field+0x70/0x70 [drm]
[   66.893370]  [<c1162446>] do_vfs_ioctl+0x2e6/0x4e0
[   66.893374]  [<c11548d1>] ? __sb_end_write+0x31/0x70
[   66.893378]  [<c1152cd5>] ? vfs_write+0x185/0x1c0
[   66.893382]  [<c11626bf>] SyS_ioctl+0x7f/0x90
[   66.893387]  [<c142850d>] sysenter_do_call+0x12/0x28
[   66.893396] ---[ end trace a8bb9aa7d94acce5 ]---

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