[Bug 92658] New: Dual monitor DisplayPort Flicker

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92658

            Bug ID: 92658
           Summary: Dual monitor DisplayPort Flicker
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: crshman at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 119163
  --> https://bugs.freedesktop.org/attachment.cgi?id=119163&action=edit
journalctl -b | grep "\[drm"

The system is an Intel NUC D34010WYK with an i3 Hasell processor.

Monitor 1 is connected via micro HDMI
Monitor 2 is connected via mini DisplayPort

At boot BIOS, Grub, systemd, all get mirrored on both screens as
expected.

However, once the login prompt hits, Monitor 2 (DisplayPort) goes blank.
It flickers periodically though.

When it does flicker on I can see the desktop, any windows that got
moved to that monitor and the clock is up to date.

The two monitors are exactly the same model, Samsung SyncMaster 204B.

I have tried swapping monitors and the issue seems to persist on the
mini DisplayPort connection only.

I tried this on multiple distributions and they all have the same issue. Ubuntu
15.10, Gnome Ubuntu 15.10, Arch Linux, Fedora 22 which leads me to believe it's
likely something in the kernel not the display manager.

-----------------
Current System
-----------------

Connection: Mini Display Port

$ lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 15.10
Release:    15.10
Codename:    wily

$ uname -a
Linux rnavarro-nuc 4.3.0-994-generic #201510162200 SMP Sat Oct 17 02:02:10 UTC
2015 x86_64 x86_64 x86_64 GNU/Linux

$ sudo lshw
rnavarro-nuc              
    description: Computer
    width: 64 bits
    capabilities: smbios-2.8 vsyscall32
  *-core
       description: Motherboard
       physical id: 0
     *-memory
          description: System memory
          physical id: 0
          size: 7879MiB
     *-cpu
          product: Intel(R) Core(TM) i3-4010U CPU @ 1.70GHz
          vendor: Intel Corp.
          physical id: 1
          bus info: cpu at 0
          size: 1700MHz
          capacity: 1700MHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8
apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht
tm pbe syscall nx pdpe1gb rdtscp x86-64 constant_tsc arch_perfmon pebs bts
rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64
monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2
x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm
ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase
tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt cpufreq
     *-pci
          description: Host bridge
          product: Haswell-ULT DRAM Controller
          vendor: Intel Corporation
          physical id: 100
          bus info: pci at 0000:00:00.0
          version: 09
          width: 32 bits
          clock: 33MHz
          configuration: driver=hsw_uncore
          resources: irq:0
        *-display
             description: VGA compatible controller
             product: Haswell-ULT Integrated Graphics Controller
             vendor: Intel Corporation
             physical id: 2
             bus info: pci at 0000:00:02.0
             version: 09
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm vga_controller bus_master cap_list rom
             configuration: driver=i915 latency=0
             resources: irq:45 memory:f7800000-f7bfffff
memory:e0000000-efffffff ioport:f000(size=64)

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