[Bug 72314] New: sna: (Haswell) Enabling ext. Monitor takes up to 24s

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72314

          Priority: lowest
            Bug ID: 72314
                CC: akaburtan at gmail.com, cordlandwehr at kde.org,
                    intel-gfx-bugs at lists.freedesktop.org,
                    pprasse at actindo.de
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: sna: (Haswell) Enabling ext. Monitor takes up to 24s
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: consume.noise at gmail.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
        Depends on: 71267
           Product: DRI

Created attachment 90237
  --> https://bugs.freedesktop.org/attachment.cgi?id=90237&action=edit
dmesg 3.13.0-rc1 replug monitor 5 times

+++ This bug was initially created as a clone of Bug #71267 +++

- same HW as in bug #71267
- kernel v3.13.0-rc1 + udelay(500) (see bug #71267, comment #29 and comment
#32)

(As stated in the initial bug udelay() has to be raised to 500. Todd wrote that
300 might be okay. So, 500 is far above this. Hopefully the 500 doesn't cause
this bug as a side-effect.)

When plugging in the monitor at one DP of the docking station it takes up to
24s (shortest was 3s) until it gets activated (the console cloned to it).
In this attachment I've replugged the monitor 5 times, log timestamps are:
  1. 30-33 ... 3s
  2. 74-85 ... 11s
  3. 184-203 ... 19s
  4. 238-262 ... 24s
  5. 303-310 ... 7s

As of this I wouldn't call it a bug - the monitor gets activated finally.
Therefor I've set the priority to "lowest".

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