[Bug 96826] New: [KBL] modeset failure

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96826

            Bug ID: 96826
           Summary: [KBL] modeset failure
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: tjaalton at ubuntu.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 124913
  --> https://bugs.freedesktop.org/attachment.cgi?id=124913&action=edit
log from recent nightly

A system fails to boot up properly, monitor remains blank. Nightly is affected,
this is shown on the log (attached):

[    2.570838] WARNING: CPU: 1 PID: 167 at
/home/kernel/COD/linux/drivers/gpu/drm/i915/intel_d
p.c:4091 intel_digital_port_connected+0x89/0x280 [i915]
[    2.570842] Missing switch case (4) in g4x_digital_port_connected
[    2.570843] Modules linked in: rtsx_pci_sdmmc mmc_core i915 ahci xhci_pci
libahci xhci_hcd 
i2c_algo_bit e1000e libata drm_kms_helper crc32c_intel psmouse usbcore ptp
rtsx_pci scsi_mod d
rm pps_core mfd_core usb_common fan thermal wmi i2c_hid video hid button fjes
[    2.570860] CPU: 1 PID: 167 Comm: kworker/u16:5 Not tainted
4.7.0-994-generic #201607042202
[    2.570863] Hardware name: FOOBAR      , BIOS 99.02.04 06/23/2016
[    2.570869] Workqueue: events_unbound async_run_entry_fn
[    2.570871]  0000000000000286 0000000002a6b479 ffffffff81321095
ffff880801e13c58
[    2.570875]  0000000000000000 ffffffff81078a6e ffff880801eb0000
ffff880801e13cb0
[    2.570878]  ffff880802319800 000000000000001a ffff8808023180e8
0000000000000003
[    2.570882] Call Trace:
[    2.570886]  [<ffffffff81321095>] ? dump_stack+0x5c/0x77
[    2.570889]  [<ffffffff81078a6e>] ? __warn+0xbe/0xe0
[    2.570891]  [<ffffffff81078aef>] ? warn_slowpath_fmt+0x5f/0x80
[    2.570895]  [<ffffffff81462bf4>] ? __pm_runtime_resume+0x54/0x70
[    2.570916]  [<ffffffffc0404969>] ? intel_digital_port_connected+0x89/0x280
[i915]
[    2.570935]  [<ffffffffc037c83e>] ? intel_display_power_get+0x2e/0x40 [i915]
[    2.570956]  [<ffffffffc0404bc1>] ? intel_dp_long_pulse+0x61/0x730 [i915]
[    2.570973]  [<ffffffffc037cbab>] ? intel_display_power_put+0xab/0xf0 [i915]
[    2.570993]  [<ffffffffc0405653>] ? intel_dp_detect+0x93/0xc0 [i915]
[    2.570999]  [<ffffffffc0230e9b>] ?
drm_helper_probe_single_connector_modes+0x26b/0x510 [drm_kms_helper]
[    2.571005]  [<ffffffffc023ed4c>] ? drm_fb_helper_initial_config+0xac/0x420
[drm_kms_helper]
[    2.571008]  [<ffffffff810a08f0>] ? check_preempt_curr+0x50/0x90
[    2.571011]  [<ffffffff810a0944>] ? ttwu_do_wakeup+0x14/0xe0
[    2.571030]  [<ffffffffc03f4fa4>] ? intel_fbdev_initial_config+0x14/0x30
[i915]
[    2.571034]  [<ffffffff81099af5>] ? async_run_entry_fn+0x45/0x130
[    2.571037]  [<ffffffff810912a0>] ? process_one_work+0x160/0x430
[    2.571040]  [<ffffffff810915bd>] ? worker_thread+0x4d/0x480
[    2.571043]  [<ffffffff815e577d>] ? __schedule+0x1ed/0x6b0
[    2.571045]  [<ffffffff81091570>] ? process_one_work+0x430/0x430
[    2.571048]  [<ffffffff8109736d>] ? kthread+0xcd/0xf0
[    2.571050]  [<ffffffff815e9d9f>] ? ret_from_fork+0x1f/0x40
[    2.571052]  [<ffffffff810972a0>] ? kthread_create_on_node+0x190/0x190
[    2.571054] ---[ end trace e5ae5fa2879a99f3 ]---
[    2.571059] i915 0000:00:02.0: No connectors reported connected with modes
[    2.571063] [drm] Cannot find any crtc or sizes - going 1024x768

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