[Bug 91592] [pnv regression] OOPS on boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91592

--- Comment #2 from Chris Wilson <chris at chris-wilson.co.uk> ---
Got it at last with the usual trick of killing fbcon/fbdev:

[  548.535895] [drm] Initialized i915 1.6.0 20150619 for 0000:00:02.0 on minor
0
[  548.604106] [drm] GMBUS [i915 gmbus vga] timed out, falling back to bit
banging on pin 2
[  548.996278] ------------[ cut here ]------------
[  548.996289] kernel BUG at drivers/gpu/drm/i915/intel_display.c:1947!
[  548.996295] invalid opcode: 0000 [#1] SMP 
[  548.996301] Modules linked in: i915(E) ctr ccm input_polldev bnep rfcomm
arc4 ath9k ath9k_common ath9k_hw uvcvideo ath videobuf2_vmalloc mac80211
videobuf2_memops videobuf2_core snd_hda_codec_conexant v4l2_common
snd_hda_codec_generic videodev dell_wmi snd_hda_intel gpio_ich sparse_keymap
snd_hda_controller snd_hda_codec hid_multitouch snd_hda_core dell_laptop
snd_hwdep dcdbas btusb snd_pcm i8k btbcm btintel snd_seq_midi bluetooth
snd_seq_midi_event coretemp snd_rawmidi cfg80211 snd_seq snd_seq_device
microcode joydev snd_timer serio_raw snd wmi drm_kms_helper soundcore shpchp
lpc_ich usbhid hid psmouse ahci libahci
[  548.996382] CPU: 1 PID: 1134 Comm: Xorg Tainted: G        W   E   4.1.0-rc6+
#217
[  548.996386] Hardware name: Dell Inc. Inspiron 1090/Inspiron 1090, BIOS A06
08/23/2011
[  548.996392] task: f0fcd2e0 ti: efe26000 task.ti: efe26000
[  548.996398] EIP: 0060:[<f8bd15ef>] EFLAGS: 00213297 CPU: 1
[  548.996462] EIP is at __intel_set_mode+0x71f/0x750 [i915]
[  548.996467] EAX: f5998000 EBX: f5aee000 ECX: f5998000 EDX: 00203296
[  548.996472] ESI: eff53000 EDI: 00000001 EBP: efe27da0 ESP: efe27d4c
[  548.996477]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[  548.996482] CR0: 80050033 CR2: bf8e8d10 CR3: 30e1a020 CR4: 000007f0
[  548.996486] Stack:
[  548.996489]  e6b51580 e6b51580 00000000 efe27d84 c1413071 efe27d78 efe27d84
c1413eed
[  548.996502]  f5aee000 f5998000 f0192800 f0192800 f5998000 f5413c00 eff53000
f8bc25e9
[  548.996513]  f5aee000 f0192800 f0192800 eff53000 efe27e24 efe27de0 f8bd7bb4
00000000
[  548.996525] Call Trace:
[  548.996539]  [<c1413071>] ? drm_atomic_set_crtc_for_plane+0x41/0x100
[  548.996547]  [<c1413eed>] ? drm_atomic_set_fb_for_plane+0x1d/0x90
[  548.996604]  [<f8bc25e9>] ? intel_modeset_setup_plane_state+0x59/0xc0 [i915]
[  548.996663]  [<f8bd7bb4>] intel_crtc_set_config+0x294/0x550 [i915]
[  548.996673]  [<c1619b30>] ? mutex_lock+0x10/0x28
[  548.996681]  [<c140472e>] drm_mode_set_config_internal+0x4e/0xc0
[  548.996688]  [<c14085e2>] drm_mode_setcrtc+0x3f2/0x540
[  548.996697]  [<c12c2edd>] ? apparmor_capable+0x1d/0x50
[  548.996704]  [<c14081f0>] ? drm_mode_setplane+0x1b0/0x1b0
[  548.996711]  [<c13fa372>] drm_ioctl+0x2e2/0x530
[  548.996719]  [<c1120117>] ? __generic_file_write_iter+0x177/0x1b0
[  548.996725]  [<c14081f0>] ? drm_mode_setplane+0x1b0/0x1b0
[  548.996735]  [<c11ab292>] ? fsnotify+0x272/0x360
[  548.996742]  [<c13fa090>] ? drm_getmap+0xb0/0xb0
[  548.996750]  [<c11856ea>] do_vfs_ioctl+0x30a/0x530
[  548.996758]  [<c1176531>] ? __sb_end_write+0x31/0x70
[  548.996765]  [<c1174b38>] ? vfs_write+0x158/0x1a0
[  548.996772]  [<c118dc52>] ? __fget_light+0x22/0x60
[  548.996779]  [<c1185970>] SyS_ioctl+0x60/0x90
[  548.996786]  [<c161be08>] sysenter_do_call+0x12/0x12
[  548.996790] Code: 08 4b 56 c3 f8 c7 44 24 04 ac 07 00 00 c7 04 24 80 84 c2
f8 e8 a3 9f 47 c8 e9 4c fa ff ff 8b 45 dc 80 78 1a 04 0f 87 41 f9 ff ff <0f> 0b
c7 44 24 08 d8 b3 c2 f8 c7 44 24 04 72 30 00 00 c7 04 24
[  548.996861] EIP: [<f8bd15ef>] __intel_set_mode+0x71f/0x750 [i915] SS:ESP
0068:efe27d4c
[  548.996924] ---[ end trace 95c346afe1be8257 ]---

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