[Bug 56834] [ivb DP dual link DVI dongle] [drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56834

--- Comment #33 from Anthony Foiani <anthony.foiani+freedesktop at gmail.com> ---
Well, it's *different* with 3.15-rc3.

Not in a good way, though.

Current fully-up-to-date Fedora 19 boots to some low resolution, but at least
it prompts the external DP->DVI2 converter to provide some sort of signal.

3.15-rc3 resulted in no display whatsoever.

Trace output below, going to reboot with drm debugging enabled.

May  2 04:12:17 opti990 kernel: [    2.108060] ------------[ cut here
]------------
May  2 04:12:17 opti990 kernel: [    2.108092] WARNING: CPU: 1 PID: 227 at
drivers/gpu/drm/i915/intel_display.c:9766 intel_modeset_check_state+0x61f/0x7d0
[i915]()
May  2 04:12:17 opti990 kernel: [    2.108093] encoder's hw state doesn't match
sw tracking (expected 1, found 0)
May  2 04:12:17 opti990 kernel: [    2.108100] Modules linked in: i915(+)
i2c_algo_bit drm_kms_helper drm i2c_core video
May  2 04:12:17 opti990 kernel: [    2.108103] CPU: 1 PID: 227 Comm:
systemd-udevd Not tainted 3.15.0-0.rc3.git3.1.fc19.x86_64 #1
May  2 04:12:17 opti990 kernel: [    2.108104] Hardware name: Dell Inc.
OptiPlex 990/0PGKWF, BIOS A07 09/10/2011
May  2 04:12:17 opti990 kernel: [    2.108108]  0000000000000000
00000000127708fd ffff880036e933c8 ffffffff817d5f5a
May  2 04:12:17 opti990 kernel: [    2.108112]  ffff880036e93410
ffff880036e93400 ffffffff8109592d 0000000000000001
May  2 04:12:17 opti990 kernel: [    2.108115]  ffff880036e93490
ffff88021fdd67e8 ffff88021cb41000 ffff88021fdd6000
May  2 04:12:17 opti990 kernel: [    2.108116] Call Trace:
May  2 04:12:17 opti990 kernel: [    2.108122]  [<ffffffff817d5f5a>]
dump_stack+0x4d/0x66
May  2 04:12:17 opti990 kernel: [    2.108126]  [<ffffffff8109592d>]
warn_slowpath_common+0x7d/0xa0
May  2 04:12:17 opti990 kernel: [    2.108128]  [<ffffffff810959ac>]
warn_slowpath_fmt+0x5c/0x80
May  2 04:12:17 opti990 kernel: [    2.108148]  [<ffffffffa00eaaff>]
intel_modeset_check_state+0x61f/0x7d0 [i915]
May  2 04:12:17 opti990 kernel: [    2.108164]  [<ffffffffa00ead45>]
intel_set_mode+0x25/0x30 [i915]
May  2 04:12:17 opti990 kernel: [    2.108179]  [<ffffffffa00ebc0d>]
intel_crtc_set_config+0x8ed/0xdd0 [i915]
May  2 04:12:17 opti990 kernel: [    2.108183]  [<ffffffff810f734d>] ?
trace_hardirqs_on+0xd/0x10
May  2 04:12:17 opti990 kernel: [    2.108195]  [<ffffffffa0033ec7>]
drm_mode_set_config_internal+0x67/0x110 [drm]
May  2 04:12:17 opti990 kernel: [    2.108200]  [<ffffffffa00877d3>]
drm_fb_helper_restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
May  2 04:12:17 opti990 kernel: [    2.108205]  [<ffffffffa00893f1>]
drm_fb_helper_set_par+0x31/0x80 [drm_kms_helper]
May  2 04:12:17 opti990 kernel: [    2.108209]  [<ffffffff81430254>]
fbcon_init+0x514/0x5a0
May  2 04:12:17 opti990 kernel: [    2.108213]  [<ffffffff814c6bf8>]
visual_init+0xb8/0x120
May  2 04:12:17 opti990 kernel: [    2.108216]  [<ffffffff814c9363>]
do_bind_con_driver+0x163/0x330
May  2 04:12:17 opti990 kernel: [    2.108218]  [<ffffffff814c9b14>]
do_take_over_console+0x114/0x1c0
May  2 04:12:17 opti990 kernel: [    2.108221]  [<ffffffff8142b8d3>]
do_fbcon_takeover+0x63/0xd0
May  2 04:12:17 opti990 kernel: [    2.108224]  [<ffffffff81430d35>]
fbcon_event_notify+0x6b5/0x800
May  2 04:12:17 opti990 kernel: [    2.108227]  [<ffffffff817e4156>]
notifier_call_chain+0x66/0x150
May  2 04:12:17 opti990 kernel: [    2.108230]  [<ffffffff810c87e3>]
__blocking_notifier_call_chain+0x53/0x70
May  2 04:12:17 opti990 kernel: [    2.108234]  [<ffffffff810c8816>]
blocking_notifier_call_chain+0x16/0x20
May  2 04:12:17 opti990 kernel: [    2.108236]  [<ffffffff8143784b>]
fb_notifier_call_chain+0x1b/0x20
May  2 04:12:17 opti990 kernel: [    2.108239]  [<ffffffff814399bc>]
register_framebuffer+0x1fc/0x350
May  2 04:12:17 opti990 kernel: [    2.108243]  [<ffffffffa008977e>]
drm_fb_helper_initial_config+0x33e/0x510 [drm_kms_helper]
May  2 04:12:17 opti990 kernel: [    2.108246]  [<ffffffff810f7145>] ?
mark_held_locks+0x75/0xa0
May  2 04:12:17 opti990 kernel: [    2.108249]  [<ffffffff817dee76>] ?
_raw_spin_unlock_irqrestore+0x36/0x70
May  2 04:12:17 opti990 kernel: [    2.108252]  [<ffffffff810f7275>] ?
trace_hardirqs_on_caller+0x105/0x1d0
May  2 04:12:17 opti990 kernel: [    2.108271]  [<ffffffffa00f6f6f>]
intel_fbdev_initial_config+0x1f/0x30 [i915]
May  2 04:12:17 opti990 kernel: [    2.108292]  [<ffffffffa0118269>]
i915_driver_load+0xf39/0xfc0 [i915]
May  2 04:12:17 opti990 kernel: [    2.108295]  [<ffffffff810f7145>] ?
mark_held_locks+0x75/0xa0
May  2 04:12:17 opti990 kernel: [    2.108298]  [<ffffffff817dc78d>] ?
__mutex_unlock_slowpath+0xbd/0x190
May  2 04:12:17 opti990 kernel: [    2.108301]  [<ffffffff810f7275>] ?
trace_hardirqs_on_caller+0x105/0x1d0
May  2 04:12:17 opti990 kernel: [    2.108304]  [<ffffffff810f7145>] ?
mark_held_locks+0x75/0xa0
May  2 04:12:17 opti990 kernel: [    2.108307]  [<ffffffff817dee76>] ?
_raw_spin_unlock_irqrestore+0x36/0x70
May  2 04:12:17 opti990 kernel: [    2.108310]  [<ffffffff810f7275>] ?
trace_hardirqs_on_caller+0x105/0x1d0
May  2 04:12:17 opti990 kernel: [    2.108313]  [<ffffffff810f734d>] ?
trace_hardirqs_on+0xd/0x10
May  2 04:12:17 opti990 kernel: [    2.108322]  [<ffffffffa002e08d>]
drm_dev_register+0xad/0x100 [drm]
May  2 04:12:17 opti990 kernel: [    2.108330]  [<ffffffffa0030df9>]
drm_get_pci_dev+0x89/0x200 [drm]
May  2 04:12:17 opti990 kernel: [    2.108347]  [<ffffffffa00925fb>]
i915_pci_probe+0x3b/0x60 [i915]
May  2 04:12:17 opti990 kernel: [    2.108350]  [<ffffffff8140ad35>]
local_pci_probe+0x45/0xa0
May  2 04:12:17 opti990 kernel: [    2.108352]  [<ffffffff8140bfe5>] ?
pci_match_device+0xc5/0xd0
May  2 04:12:17 opti990 kernel: [    2.108355]  [<ffffffff8140c129>]
pci_device_probe+0xf9/0x150
May  2 04:12:17 opti990 kernel: [    2.108359]  [<ffffffff814f7665>]
driver_probe_device+0x125/0x3a0
May  2 04:12:17 opti990 kernel: [    2.108362]  [<ffffffff814f79b3>]
__driver_attach+0x93/0xa0
May  2 04:12:17 opti990 kernel: [    2.108364]  [<ffffffff814f7920>] ?
__device_attach+0x40/0x40
May  2 04:12:17 opti990 kernel: [    2.108367]  [<ffffffff814f53a3>]
bus_for_each_dev+0x73/0xc0
May  2 04:12:17 opti990 kernel: [    2.108370]  [<ffffffff814f6fee>]
driver_attach+0x1e/0x20
May  2 04:12:17 opti990 kernel: [    2.108372]  [<ffffffff814f6b98>]
bus_add_driver+0x188/0x260
May  2 04:12:17 opti990 kernel: [    2.108375]  [<ffffffffa0165000>] ?
0xffffffffa0164fff
May  2 04:12:17 opti990 kernel: [    2.108377]  [<ffffffff814f8054>]
driver_register+0x64/0xf0
May  2 04:12:17 opti990 kernel: [    2.108380]  [<ffffffffa0165000>] ?
0xffffffffa0164fff
May  2 04:12:17 opti990 kernel: [    2.108382]  [<ffffffff8140a6c0>]
__pci_register_driver+0x60/0x70
May  2 04:12:17 opti990 kernel: [    2.108390]  [<ffffffffa003107a>]
drm_pci_init+0x10a/0x140 [drm]
May  2 04:12:17 opti990 kernel: [    2.108393]  [<ffffffffa0165000>] ?
0xffffffffa0164fff
May  2 04:12:17 opti990 kernel: [    2.108407]  [<ffffffffa016506a>]
i915_init+0x6a/0x6c [i915]
May  2 04:12:17 opti990 kernel: [    2.108410]  [<ffffffff8100216a>]
do_one_initcall+0xfa/0x1b0
May  2 04:12:17 opti990 kernel: [    2.108414]  [<ffffffff81062e53>] ?
set_memory_nx+0x43/0x50
May  2 04:12:17 opti990 kernel: [    2.108418]  [<ffffffff811302ae>]
load_module+0x1e1e/0x2700
May  2 04:12:17 opti990 kernel: [    2.108421]  [<ffffffff8112b840>] ?
store_uevent+0x70/0x70
May  2 04:12:17 opti990 kernel: [    2.108424]  [<ffffffff81237610>] ?
kernel_read+0x50/0x80
May  2 04:12:17 opti990 kernel: [    2.108428]  [<ffffffff81130d66>]
SyS_finit_module+0xa6/0xd0
May  2 04:12:17 opti990 kernel: [    2.108432]  [<ffffffff817e9a69>]
system_call_fastpath+0x16/0x1b
May  2 04:12:17 opti990 kernel: [    2.108434] ---[ end trace 50dbbbf7920940d9
]---

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