https://bugs.kde.org/show_bug.cgi?id=356843

            Bug ID: 356843
           Summary: Newly selected wallpaper is replaced with default one
                    after use Alt+F2 and putting any letter in edit box
           Product: kwin
           Version: 5.5.1
          Platform: Mageia RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kwin-bugs-n...@kde.org
          Reporter: piotr.mierzwin...@gmail.com

Windows compositor is turned on. I change wallpaper to different than default.
I press Alt+F2 and put any letter in edit box, for example "k" and I can see
like desktop is sliding left and I get again default wallpaper. This is not
happen when Windows compositor is turned off.
Additionally it makes that plasmoids/widgets newly added to the desktop (here:
cpu stat and network stat) are disappearing.


Reproducible: Always

Steps to Reproduce:
1. turn on compositor (with setting like described in Additional Information)
2. change wallpaper
3. use Alt+F2 and put any letter in edit box

Actual Results:  
Newly chose wallpaper is replaced with default one.
Additionally it makes that plasmoids/widgets (cpu stat and network stat) added
to the desktop disappearing.

Expected Results:  
Newly selected wallpaper should not be replaced.
Plasmoids/Widgets should not be disappear.

Compositor settings:
- Scale method: Accurate
- Rendering backend: OpenGL 2.0
- OpenGL interface: GLX
- Tearing prevention: Automatic
- Keep windows thumbnails: Only for shown windows
unchecked: Suspend compositor for full screen windows
unchecked: Enable color correction

My hardware platform is following Intel Core i7 Skylake. I'm using only
integrated HD 530 graphics.
Output from lspci:
00:02.0 VGA compatible controller: Intel Corporation Sky Lake Integrated
Graphics (rev 06) (prog-if 00 [VGA controller])
        DeviceName:  Onboard IGD
        Subsystem: ASUSTeK Computer Inc. Device 8694
        Flags: bus master, fast devsel, latency 0, IRQ 122
        Memory at de000000 (64-bit, non-prefetchable) [size=16M]
        Memory at c0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at f000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [40] Vendor Specific Information: Len=0c <?>
        Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
        Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Capabilities: [d0] Power Management version 2
        Capabilities: [100] #1b
        Capabilities: [200] Address Translation Service (ATS)
        Capabilities: [300] #13
        Kernel driver in use: i915
        Kernel modules: i915

lshw output:
        *-display
             description: VGA compatible controller
             product: Sky Lake Integrated Graphics
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 06
             width: 64 bits
             clock: 33MHz
             capabilities: pciexpress msi pm vga_controller bus_master cap_list
rom
             configuration: driver=i915 latency=0
             resources: irq:122 memory:de000000-deffffff
memory:c0000000-cfffffff ioport:f000(size=64)

lsmod output:
# lsmod | grep i9
i915                 1122304  18
video                  36864  2 i915,asus_wmi
button                 16384  1 i915
i2c_algo_bit           16384  1 i915
drm_kms_helper        126976  1 i915
drm                   352256  12 i915,drm_kms_helper

Parameters set for i915
Module: i915
Parameter: disable_display --> N
Parameter: disable_power_well --> 1
Parameter: disable_vtd_wa --> N
Parameter: edp_vswing --> 0
Parameter: enable_cmd_parser --> 1
Parameter: enable_execlists --> 1
Parameter: enable_fbc --> -1
Parameter: enable_guc_submission --> N
Parameter: enable_hangcheck --> Y
Parameter: enable_ips --> 1
Parameter: enable_ppgtt --> 2
Parameter: enable_psr --> 0
Parameter: enable_rc6 --> 1
Parameter: fastboot --> N
Parameter: guc_log_level --> -1
Parameter: invert_brightness --> 0
Parameter: load_detect_test --> N
Parameter: lvds_channel_mode --> 0
Parameter: lvds_use_ssc --> -1
Parameter: mmio_debug --> 0
Parameter: modeset --> -1
Parameter: panel_ignore_lid --> 1
Parameter: prefault_disable --> N
Parameter: preliminary_hw_support --> 0
Parameter: reset --> Y
Parameter: semaphores --> -1
Parameter: use_mmio_flip --> 0
Parameter: vbt_sdvo_panel_type --> -1
Parameter: verbose_state_checks --> Y

dmesg output:
# dmesg | grep i9
[    1.562538] [drm] Initialized i915 1.6.0 20150731 for 0000:00:02.0 on minor
0
[    1.641839] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    4.019392] snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops
i915_audio_component_bind_ops [i915])

Xorg version is 1.18 (x11-server-xorg-1.18.0-10.mga6). Attached Xorg log.

Kernel version is 4.3.2 (kernel-desktop-4.3.2-2.mga6-1-1.mga6). Including the
latest firmware (kernel-firmware-nonfree-20151120-1.mga6.nonfree).
I also installed additional firmware provided by Intel. I mean:
skl_dmc_ver1_23.bin and skl_guc_ver4_3.bin
# uname -a
Linux SkyLake-i7 4.3.2-desktop-2.mga6 #1 SMP Sat Dec 12 22:47:32 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux

Installed mesa library:
lib64mesaglesv2_2-11.1.0-1.mga6
mesa-11.1.0-1.mga6
lib64mesaglu1-devel-9.0.0-5.mga5
lib64mesagl1-devel-11.1.0-1.mga6
lib64mesaegl1-11.1.0-1.mga6
lib64mesaglu1-9.0.0-5.mga5
lib64mesagl1-11.1.0-1.mga6
lib64mesaegl1-devel-11.1.0-1.mga6

glxinfo output attached.

Plasma 5.5.1. KFrameworks 5.17.0. Qt-5.5.1
All packages are coming from Mageia 6 Cauldron.
kwin_x11 is running.
Searching on desktop is turning on ("Enable File Search" option is checked).

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