[Bug 96916] New: Regression: screen flashes with PSR enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96916

            Bug ID: 96916
           Summary: Regression: screen flashes with PSR enabled
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: nine at detonation.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: david.weinehall at intel.com,
                    intel-gfx-bugs at lists.freedesktop.org

Created attachment 125054
  --> https://bugs.freedesktop.org/attachment.cgi?id=125054&action=edit
dmesg output

Since commit 9b58e352b463f2f096d699d47b1c4c57879b617f which enables PSR by
default on Haswell, my external screen flashes as long as the system is docked
and idle. Moving the mouse or compiling a kernel keeps the screen readable.
When it flashes it looks like it takes a single line of output and fills the
screen with this line. The issue goes away by adding i915.enable_psr=0 or 
i915.enable_psr=2 to the kernel command line.

System Information
        Manufacturer: LENOVO
        Product Name: 20ANCTO1WW
        Version: ThinkPad T440p

Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz

Running openSUSE 13.2 and KDE.

> cat /sys/kernel/debug/dri/0/i915_edp_psr_status^
i915_edp_psr_status 
Sink_Support: yes
Source_OK: yes
Enabled: yes
Active: yes
Busy frontbuffer bits: 0x000
Re-enable work scheduled: no
Main link in standby mode: yes
HW Enabled & Active bit: yes
Performance_Counter: 76716

Attaching dmesg output.

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