[Bug 72343] New: Parts of complex GUI applications are blinking (becoming transparent for a short period of time) with Option "TearFree" set to "true"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72343

          Priority: medium
            Bug ID: 72343
          Assignee: chris at chris-wilson.co.uk
           Summary: Parts of complex GUI applications are blinking
                    (becoming transparent for a short period of time) with
                    Option "TearFree" set to "true"
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: iamtakingiteasy at eientei.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

With Option "TearFree" "true" in xorg.conf as in 

Section "Device"
    Identifier  "Card0"
    Driver      "intel"
    BusID       "PCI:0:2:0"
    Option      "AccelMethod"  "sna"
    Option      "TearFree" "true"
EndSection

latest git version (on the moment of this report this was
bd22abee8f33b20ff6bc7297b0a9ae8708d18727 commit on master branch) of
xf86-video-intel is producing "blinking" effect for parts of application with
complex GUI with lots of elements, when they are getting updated and redrawn or
obscured by mouse cursor. When "TearFree" is commented out -- all works
flawlessly. Only complex GUI applications like IDEs, or IMs (e.g. IntelliJ IDEA
or Skype) are affected, simple ones (like terminal emulators) are working fine
even with TearFree set to true.

My setup is:

X.Org X Server 1.14.99.903 (1.15.0 RC 3)
Release Date: 2013-11-23
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.12.2-tuxonice x86_64 Gentoo
Current Operating System: Linux noteshi 3.12.2-tuxonice #1 SMP Thu Dec 5
12:44:51 MSK 2013 x86_64
Kernel command line: BOOT_IMAGE=/vmlinuz-3.12.2-tuxonice rootfstype=ext4
root=/dev/sda4

OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile 
OpenGL core profile version string: 3.3 (Core Profile) Mesa 10.1.0-devel
(git-7435d9f)

Hardware: 

Lenovo ThinkPad X230 (HD4000)

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor
Graphics Controller (rev 09) (prog-if 00 [VGA controller])
        Subsystem: Lenovo Device 21fa
        Flags: bus master, fast devsel, latency 0, IRQ 40
        Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 5000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Capabilities: [d0] Power Management version 2
        Capabilities: [a4] PCI Advanced Features
        Kernel driver in use: i915

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