[Bug 92037] New: [SKL-Y regression] blank screen on boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92037

            Bug ID: 92037
           Summary: [SKL-Y regression] blank screen on boot
           Product: DRI
           Version: XOrg 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 118340
  --> https://bugs.freedesktop.org/attachment.cgi?id=118340&action=edit
dmesg

2-in-1 SDP doesn't boot up properly with 4.3-rc1:

[    3.755082] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal
timeout (has irq: 1)
!
[    3.771067] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal
timeout (has irq: 1)
!
[    3.787066] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal
timeout (has irq: 1)
!
[    3.803054] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal
timeout (has irq: 1)
!
[    3.819051] [drm:intel_dp_aux_ch [i915]] *ERROR* dp aux hw did not signal
timeout (has irq: 1)
!
[    3.819076] [drm:intel_dp_aux_ch [i915]] *ERROR* dp_aux_ch not done status
0xad40001f
[    3.843011] ------------[ cut here ]------------
[    3.843046] WARNING: CPU: 1 PID: 42 at
/home/kernel/COD/linux/drivers/gpu/drm/i915/intel_dp.c:
854 intel_dp_aux_ch+0x10c/0x640 [i915]()

worked fine with 4.2+backports

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