[Bug 96319] New: [CHT] Starting X on Surface 3 takes ~15 seconds

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96319

            Bug ID: 96319
           Summary: [CHT] Starting X on Surface 3 takes ~15 seconds
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: stephenjust at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 124252
  --> https://bugs.freedesktop.org/attachment.cgi?id=124252&action=edit
dmesg with drm-intel-nightly (Jun 1 2016)

When starting X on the Surface 3, either through starting GDM or a window
manager directly, it takes approximately 15-20 seconds for the display to show
up after executing the start command, which seems very slow.

This might be a duplicate to Bug 93929, but since then the dmesg has gotten
much less noisy.

It's not clear to me exactly what part of the gpu initialization is taking so
long from the logs, there are some gaps of about 2s in logging while the card
initializes, but they don't seem to correspond with any one log message.

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