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  1. [ 160.987742] [drm:ironlake_wait_panel_status], mask b800000f value 00000000 status 00000000 control abcd0000
  2. [ 160.987757] [drm:ironlake_edp_panel_vdd_on], PCH_PP_STATUS: 0x00000000 PCH_PP_CONTROL: 0xabcd0008
  3. [ 160.987767] [drm:ironlake_edp_panel_vdd_on], eDP was not running
  4. [ 160.988887] [drm:intel_dp_detect], DPCD: 0000000000000000
  5. [ 160.988896] [drm:ironlake_edp_panel_vdd_on], Turn eDP VDD on
  6. [ 160.988901] ------------[ cut here ]------------
  7. [ 160.988931] WARNING: at drivers/gpu/drm/i915/intel_dp.c:1005 ironlake_edp_panel_vdd_on+0x197/0x1a0 [i915]()
  8. [ 160.988939] Hardware name: Latitude E6510
  9. [ 160.988943] eDP VDD already requested on
  10. [ 160.988947] Modules linked in: i915(O+) drm_kms_helper(O) drm(O) bluetooth snd_hda_codec_hdmi snd_hda_codec_idt arc4 binfmt_misc brcmsmac mac80211 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event brcmutil cfg80211 snd_seq pcmcia snd_timer snd_seq_device ppdev yenta_socket pcmcia_rsrc parport_pc snd i2c_algo_bit pcmcia_core lp intel_agp intel_gtt parport soundcore snd_page_alloc dell_wmi psmouse crc8 cordic dell_laptop sparse_keymap serio_raw video dcdbas firewire_ohci firewire_core crc_itu_t e1000e sdhci_pci sdhci ahci libahci [last unloaded: drm]
  11. [ 160.989023] Pid: 1566, comm: upowerd Tainted: G O 3.2.0-rc6+ #3
  12. [ 160.989029] Call Trace:
  13. [ 160.989039] [<ffffffff8104f71f>] warn_slowpath_common+0x7f/0xc0
  14. [ 160.989047] [<ffffffff8104f816>] warn_slowpath_fmt+0x46/0x50
  15. [ 160.989067] [<ffffffffa04169f7>] ironlake_edp_panel_vdd_on+0x197/0x1a0 [i915]
  16. [ 160.989095] [<ffffffffa04173af>] intel_dp_detect+0x1af/0x210 [i915]
  17. [ 160.989134] [<ffffffffa03b2ef8>] status_show+0x48/0x90 [drm]
  18. [ 160.989155] [<ffffffff813a3c00>] dev_attr_show+0x20/0x60
  19. [ 160.989175] [<ffffffff810fd59e>] ? __get_free_pages+0xe/0x40
  20. [ 160.989195] [<ffffffff811c1d4a>] sysfs_read_file+0xaa/0x180
  21. [ 160.989215] [<ffffffff8114fdf0>] vfs_read+0xb0/0x180
  22. [ 160.989231] [<ffffffff8114ff0a>] sys_read+0x4a/0x90
  23. [ 160.989247] [<ffffffff815cf302>] system_call_fastpath+0x16/0x1b
  24. [ 160.989252] ---[ end trace 86be940024eff82f ]---
  25. [ 160.989258] [drm:ironlake_edp_panel_vdd_on], eDP VDD already on
  26. [ 160.989271] BUG: unable to handle kernel NULL pointer dereference at (null)
  27. [ 160.989278] IP: [<ffffffff8145d1c3>] i2c_transfer+0x23/0xe0
  28. [ 160.989287] PGD 30e13067 PUD 313e7067 PMD 0
  29. [ 160.989294] Oops: 0000 [#1] SMP
  30. [ 160.989299] CPU 2
  31. [ 160.989301] Modules linked in: i915(O+) drm_kms_helper(O) drm(O) bluetooth snd_hda_codec_hdmi snd_hda_codec_idt arc4 binfmt_misc brcmsmac mac80211 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event brcmutil cfg80211 snd_seq pcmcia snd_timer snd_seq_device ppdev yenta_socket pcmcia_rsrc parport_pc snd i2c_algo_bit pcmcia_core lp intel_agp intel_gtt parport soundcore snd_page_alloc dell_wmi psmouse crc8 cordic dell_laptop sparse_keymap serio_raw video dcdbas firewire_ohci firewire_core crc_itu_t e1000e sdhci_pci sdhci ahci libahci [last unloaded: drm]
  32. [ 160.989365]
  33. [ 160.989369] Pid: 1566, comm: upowerd Tainted: G W O 3.2.0-rc6+ #3 Dell Inc. Latitude E6510/02K3Y4
  34. [ 160.989378] RIP: 0010:[<ffffffff8145d1c3>] [<ffffffff8145d1c3>] i2c_transfer+0x23/0xe0
  35. [ 160.989387] RSP: 0018:ffff880031027cb8 EFLAGS: 00010296
  36. [ 160.989392] RAX: 0000000000000000 RBX: ffff880030c37098 RCX: 0000000000000001
  37. [ 160.989397] RDX: 0000000000000002 RSI: ffff880031027d10 RDI: ffff880030c37098
  38. [ 160.989402] RBP: ffff880031027cf8 R08: 0000000000000000 R09: 0000000000000000
  39. [ 160.989408] R10: 0720072007200720 R11: 07200720076e076f R12: ffff880030c37098
  40. [ 160.989413] R13: ffff880031027d10 R14: 0000000000000002 R15: 0000000000000001
  41. [ 160.989418] FS: 00007f0d8f12b7c0(0000) GS:ffff88011bc80000(0000) knlGS:0000000000000000
  42. [ 160.989425] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  43. [ 160.989430] CR2: 0000000000000000 CR3: 0000000031100000 CR4: 00000000000006e0
  44. [ 160.989435] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  45. [ 160.989441] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
  46. [ 160.989447] Process upowerd (pid: 1566, threadinfo ffff880031026000, task ffff8800d6a72d80)
  47. [ 160.989454] Stack:
  48. [ 160.989457] ffff880000000004 ffff880030c37000 ffff880031027d28 ffff880031027d97
  49. [ 160.989466] ffff880030c37098 0000000000000005 ffff880031027d37 0000000000000001
  50. [ 160.989474] ffff880031027d68 ffffffffa03bc5ab ffff88003098c000 ffff000100000050
  51. [ 160.989481] Call Trace:
  52. [ 160.989493] [<ffffffffa03bc5ab>] drm_do_probe_ddc_edid+0x6b/0xb0 [drm]
  53. [ 160.989505] [<ffffffffa03bc7b1>] drm_get_edid+0x31/0x270 [drm]
  54. [ 160.989525] [<ffffffffa04173be>] intel_dp_detect+0x1be/0x210 [i915]
  55. [ 160.989539] [<ffffffffa03b2ef8>] status_show+0x48/0x90 [drm]
  56. [ 160.989545] [<ffffffff813a3c00>] dev_attr_show+0x20/0x60
  57. [ 160.989552] [<ffffffff810fd59e>] ? __get_free_pages+0xe/0x40
  58. [ 160.989558] [<ffffffff811c1d4a>] sysfs_read_file+0xaa/0x180
  59. [ 160.989565] [<ffffffff8114fdf0>] vfs_read+0xb0/0x180
  60. [ 160.989571] [<ffffffff8114ff0a>] sys_read+0x4a/0x90
  61. [ 160.989577] [<ffffffff815cf302>] system_call_fastpath+0x16/0x1b
  62. [ 160.989582] Code: ff 5d c3 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 18 66 66 66 66 90 48 8b 47 10 48 89 fb 49 89 f5 41 89 d6
  63. [ 160.989610] 83 38 00 0f 84 aa 00 00 00 65 48 8b 04 25 88 b6 00 00 f7 80
  64. [ 160.989627] RIP [<ffffffff8145d1c3>] i2c_transfer+0x23/0xe0
  65. [ 160.989634] RSP <ffff880031027cb8>
  66. [ 160.989637] CR2: 0000000000000000
  67. [ 160.989642] ---[ end trace 86be940024eff830 ]---
  68. [ 161.297367] [drm:ironlake_edp_panel_vdd_off], Turn eDP VDD off 1
  69. [ 161.297379] [drm:intel_dp_i2c_init], i2c_init DPDDC-A
  70. [ 161.297385] [drm:ironlake_edp_panel_vdd_on], Turn eDP VDD on
  71. [ 161.297392] [drm:ironlake_edp_panel_vdd_on], eDP VDD already on
  72. [ 161.297805] [drm:intel_dp_i2c_aux_ch], aux_i2c nack
  73. [ 161.298217] [drm:intel_dp_i2c_aux_ch], aux_i2c nack
  74. [ 161.298274] [drm:ironlake_edp_panel_vdd_off], Turn eDP VDD off 1
  75. [ 161.298282] [drm:intel_panel_get_backlight], get backlight PWM = 93
  76. [ 161.298289] [drm:intel_panel_get_max_backlight], max backlight PWM = 93
  77. [ 161.298303] ------------[ cut here ]------------
  78. [ 161.298314] WARNING: at fs/sysfs/dir.c:481 sysfs_add_one+0xc0/0xf0()
  79. [ 161.298319] Hardware name: Latitude E6510
  80. [ 161.298323] sysfs: cannot create duplicate filename '/class/backlight/intel_backlight'
  81. [ 161.298329] Modules linked in: i915(O+) drm_kms_helper(O) drm(O) bluetooth snd_hda_codec_hdmi snd_hda_codec_idt arc4 binfmt_misc brcmsmac mac80211 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event brcmutil cfg80211 snd_seq pcmcia snd_timer snd_seq_device ppdev yenta_socket pcmcia_rsrc parport_pc snd i2c_algo_bit pcmcia_core lp intel_agp intel_gtt parport soundcore snd_page_alloc dell_wmi psmouse crc8 cordic dell_laptop sparse_keymap serio_raw video dcdbas firewire_ohci firewire_core crc_itu_t e1000e sdhci_pci sdhci ahci libahci [last unloaded: drm]
  82. [ 161.298407] Pid: 2212, comm: modprobe Tainted: G D W O 3.2.0-rc6+ #3
  83. [ 161.298412] Call Trace:
  84. [ 161.298421] [<ffffffff8104f71f>] warn_slowpath_common+0x7f/0xc0
  85. [ 161.298428] [<ffffffff8104f816>] warn_slowpath_fmt+0x46/0x50
  86. [ 161.298434] [<ffffffff811c3220>] sysfs_add_one+0xc0/0xf0
  87. [ 161.298442] [<ffffffff811c3b65>] sysfs_do_create_link+0x125/0x210
  88. [ 161.298449] [<ffffffff811c3c63>] sysfs_create_link+0x13/0x20
  89. [ 161.298456] [<ffffffff813a45ac>] device_add+0x38c/0x680
  90. [ 161.298464] [<ffffffff813b2056>] ? pm_runtime_init+0xd6/0xe0
  91. [ 161.298470] [<ffffffff813a48be>] device_register+0x1e/0x30
  92. [ 161.298478] [<ffffffff8132aaca>] backlight_device_register+0xfa/0x200
  93. [ 161.298508] [<ffffffffa041d8e8>] intel_panel_setup_backlight+0x78/0xf0 [i915]
  94. [ 161.298536] [<ffffffffa0417eff>] intel_dp_init+0x79f/0x820 [i915]
  95. [ 161.298552] [<ffffffffa03af115>] ? drm_ut_debug_printk+0x45/0x60 [drm]
  96. [ 161.298560] [<ffffffff814a22a8>] ? dmi_check_system+0x28/0x60
  97. [ 161.298585] [<ffffffffa040ffbf>] intel_modeset_init+0xb9f/0x12d0 [i915]
  98. [ 161.298606] [<ffffffffa03e7558>] i915_driver_load+0xc68/0x10d0 [i915]
  99. [ 161.298622] [<ffffffffa03b3536>] ? drm_sysfs_device_add+0x86/0xb0 [drm]
  100. [ 161.298630] [<ffffffff812dd85e>] ? kobject_uevent_env+0x11e/0x4c0
  101. [ 161.298644] [<ffffffffa03af7fb>] ? drm_get_minor+0x26b/0x310 [drm]
  102. [ 161.298666] [<ffffffffa03b1c99>] drm_get_pci_dev+0x199/0x2c0 [drm]
  103. [ 161.298679] [<ffffffff81029a59>] ? default_spin_lock_flags+0x9/0x10
  104. [ 161.298720] [<ffffffffa042a5d7>] i915_pci_probe+0x1b/0x1d [i915]
  105. [ 161.298732] [<ffffffff8130104c>] local_pci_probe+0x5c/0xd0
  106. [ 161.298742] [<ffffffff81302901>] pci_device_probe+0x101/0x120
  107. [ 161.298753] [<ffffffff813a705e>] driver_probe_device+0x7e/0x1b0
  108. [ 161.298763] [<ffffffff813a723b>] __driver_attach+0xab/0xb0
  109. [ 161.298773] [<ffffffff813a7190>] ? driver_probe_device+0x1b0/0x1b0
  110. [ 161.298784] [<ffffffff813a7190>] ? driver_probe_device+0x1b0/0x1b0
  111. [ 161.298794] [<ffffffff813a601c>] bus_for_each_dev+0x5c/0x90
  112. [ 161.298804] [<ffffffff813a6cee>] driver_attach+0x1e/0x20
  113. [ 161.298814] [<ffffffff813a6940>] bus_add_driver+0x1a0/0x270
  114. [ 161.298824] [<ffffffff813a77a6>] driver_register+0x76/0x140
  115. [ 161.298834] [<ffffffff813025d5>] __pci_register_driver+0x55/0xd0
  116. [ 161.298846] [<ffffffff815cb0cd>] ? notifier_call_chain+0x4d/0x70
  117. [ 161.298869] [<ffffffffa03b1eda>] drm_pci_init+0x11a/0x130 [drm]
  118. [ 161.298881] [<ffffffffa0454000>] ? 0xffffffffa0453fff
  119. [ 161.298908] [<ffffffffa045408b>] i915_init+0x8b/0x8d [i915]
  120. [ 161.298922] [<ffffffff810001d2>] do_one_initcall+0x42/0x180
  121. [ 161.298935] [<ffffffff8108ea41>] sys_init_module+0x91/0x200
  122. [ 161.298945] [<ffffffff815cf302>] system_call_fastpath+0x16/0x1b
  123. [ 161.298954] ---[ end trace 86be940024eff831 ]---
  124. [ 161.298985] [drm:intel_panel_setup_backlight] *ERROR* Failed to register backlight: -17
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