[Nouveau] [Bug 82247] New: [NVA8] The DisplayPort screen does not light up at first try on Linux 3.16

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82247

          Priority: medium
            Bug ID: 82247
          Assignee: nouveau at lists.freedesktop.org
           Summary: [NVA8] The DisplayPort screen does not light up at
                    first try on Linux 3.16
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: martin.peres at ensi-bourges.fr
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

Created attachment 104148
  --> https://bugs.freedesktop.org/attachment.cgi?id=104148&action=edit
When the DP screen doesn't light up

Hey Ben,

Oddly-enough, my DP screen at work does not want to light up after a cold boot
but works if I reboot right away.

As I told you before, this screen is weird when it comes to coming back from
sleep mode.

The DVI screen lights up correctly but I doubt this issue is related to dual
screen because I tried unplugging the DVI screen a while ago to investigate the
resume issue and it didn't help.

I attached to the bug the kernel logs with 
nouveau.debug="PDISP=trace,I2C=trace,VBIOS=trace" for both the case when the
screen doesn't light up and when it does.

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