[Bug 90704] Desktop will black when sliding mouse in touchpad after switching tty in my skylake machine

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90704

            Bug ID: 90704
           Summary: Desktop will black when sliding mouse in touchpad
                    after switching tty in my  skylake machine
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: General
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: vivianhu at linpus.com

Created attachment 116112
  --> https://bugs.freedesktop.org/attachment.cgi?id=116112&action=edit
video:cycle between black and normal

Environment:
-----------------------------------
Platform:SKL
Libdrm:libdrm-2.4.61
Mesa:10.6.0-rc2
Xserver:xorg-server-1.17.1
Xf86_video_intel:2.99.917
Cairo:1.14.2
Libva:1.5.1
Kernel:4.1-rc5

Machine info:
---------------------------------------------
[root at localhost ~]# lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation Sky Lake Host Bridge/DRAM
Registers [8086:1904] (rev 03)
00:02.0 VGA compatible controller [0300]: Intel Corporation Sky Lake Integrated
Graphics [8086:1916] (rev 02)
00:08.0 System peripheral [0880]: Intel Corporation Sky Lake Gaussian Mixture
Model [8086:1911]
00:14.0 USB controller [0c03]: Intel Corporation Device [8086:9d2f] (rev 10)
00:14.2 Signal processing controller [1180]: Intel Corporation Device
[8086:9d31] (rev 10)
00:16.0 Communication controller [0780]: Intel Corporation Device [8086:9d3a]
(rev 10)
00:17.0 SATA controller [0106]: Intel Corporation Device [8086:9d03] (rev 10)
00:1c.0 PCI bridge [0604]: Intel Corporation Device [8086:9d14] (rev f0)
00:1d.0 PCI bridge [0604]: Intel Corporation Device [8086:9d18] (rev f0)
00:1f.0 ISA bridge [0601]: Intel Corporation Device [8086:9d48] (rev 10)
00:1f.2 Memory controller [0580]: Intel Corporation Device [8086:9d21] (rev 10)
00:1f.3 Audio device [0403]: Intel Corporation Device [8086:9d70] (rev 10)
00:1f.4 SMBus [0c05]: Intel Corporation Device [8086:9d23] (rev 10)
01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd.
RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)
02:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Sun
XT [Radeon HD 8670A/8670M/8690M / R5 M330] [1002:6660] (rev 83)

Reproduce steps
---------------------------- 
1. poweron and enter to linux os,for example, fedora 22.
2. press ctrl+alt+F3, switching to tty3.
3. press ctrl+alt+F1, switching back to desktop, then you will see the desktop
is black.
4. slide in touchpad, the desktop will show normally again.
5. slide in touchpad again, the desktop will black again.
6. The desktop will cycle between black and normal when sliding mouse in
touchpad continually, please refer to the attached video.

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