Cluttered image when resizing window

[mighty-p]

When I resize the vaapidevice window, sometimes the image becomes cluttered with strange artefacts on it. As soon as I either display the OSD, or change window size again, the artefacts disappear again and everything seems normal.

P.S. I should add that this issue has appeared recently. It was not present in the old softhddevice pesintta code (before the project was renamed to vaapidevice and a lot of code was changed).

VAAPIDEVICE SYSTEM INFORMATION REPORT

inxi

System:    Kernel: 4.13.0-36-generic x86_64 (64 bit gcc: 5.4.0)
           Desktop: Cinnamon 3.6.7 (Gtk 3.18.9) Distro: Linux Mint 18.3 Sylvia
Machine:   Mobo: MSI model: B150M MORTAR (MS-7972) v: 2.0
           Bios: American Megatrends v: C.90 date: 11/03/2016
CPU:       Quad core Intel Core i5-7500 (-MCP-) cache: 6144 KB
           flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 27264
           clock speeds: max: 3800 MHz 1: 3400 MHz 2: 3400 MHz 3: 3400 MHz
           4: 3400 MHz
Graphics:  Card: Intel Device 5912 bus-ID: 00:02.0
           Display Server: X.Org 1.18.4 drivers: (unloaded: fbdev,vesa)
           Resolution: 1920x1080@60.00hz
           GLX Renderer: Mesa DRI Intel HD Graphics 630 (Kaby Lake GT2)
           GLX Version: 3.0 Mesa 17.2.8 Direct Rendering: Yes
Audio:     Card-1 Intel Sunrise Point-H HD Audio
           driver: snd_hda_intel bus-ID: 00:1f.3
           Card-2 Micronas Composite USB-Device
           driver: USB Audio usb-ID: 001-003
           Sound: Advanced Linux Sound Architecture v: k4.13.0-36-generic
Network:   Card: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
           driver: r8169 v: 2.3LK-NAPI port: e000 bus-ID: 02:00.0

vainfo

vainfo: VA-API version: 0.39 (libva 1.7.0)
vainfo: Driver version: Intel i965 driver for Intel(R) Kabylake - 1.7.0
vainfo: Supported profile and entrypoints
      VAProfileMPEG2Simple            :	VAEntrypointVLD
      VAProfileMPEG2Simple            :	VAEntrypointEncSlice
      VAProfileMPEG2Main              :	VAEntrypointVLD
      VAProfileMPEG2Main              :	VAEntrypointEncSlice
      VAProfileH264ConstrainedBaseline:	VAEntrypointVLD
      VAProfileH264ConstrainedBaseline:	VAEntrypointEncSlice
      VAProfileH264Main               :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointEncSlice
      VAProfileH264High               :	VAEntrypointVLD
      VAProfileH264High               :	VAEntrypointEncSlice
      VAProfileH264MultiviewHigh      :	VAEntrypointVLD
      VAProfileH264MultiviewHigh      :	VAEntrypointEncSlice
      VAProfileH264StereoHigh         :	VAEntrypointVLD
      VAProfileH264StereoHigh         :	VAEntrypointEncSlice
      VAProfileVC1Simple              :	VAEntrypointVLD
      VAProfileVC1Main                :	VAEntrypointVLD
      VAProfileVC1Advanced            :	VAEntrypointVLD
      VAProfileNone                   :	VAEntrypointVideoProc
      VAProfileJPEGBaseline           :	VAEntrypointVLD
      VAProfileJPEGBaseline           :	VAEntrypointEncPicture
      VAProfileVP8Version0_3          :	VAEntrypointVLD
      VAProfileVP8Version0_3          :	VAEntrypointEncSlice
      VAProfileHEVCMain               :	VAEntrypointVLD
      VAProfileHEVCMain               :	VAEntrypointEncSlice
      VAProfileHEVCMain10             :	VAEntrypointVLD
      VAProfileVP9Profile0            :	VAEntrypointVLD
      VAProfileVP9Profile2            :	VAEntrypointVLD

ffmpeg

ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
configuration: --prefix=/opt/ffmpeg-3.4.2 --enable-shared --enable-gpl
libavutil      55. 78.100 / 55. 78.100
libavcodec     57.107.100 / 57.107.100
libavformat    57. 83.100 / 57. 83.100
libavdevice    57. 10.100 / 57. 10.100
libavfilter     6.107.100 /  6.107.100
libswscale      4.  8.100 /  4.  8.100
libswresample   2.  9.100 /  2.  9.100
libpostproc    54.  7.100 / 54.  7.100

[9000h]

the libva and the Xserver seem to be a bit outdated

[mighty-p]

yes, I know. It's the versions included in Mint 18.3 (identical to those in Ubuntu xenial). I will certainly not touch the Xserver. For libva, I tried already installing a recent version in parallel to /opt, but was never able to get this working (for such versions, softhddevice/vaapidevice always just crashed at start, which is probably since I did not correctly install this). So I am currently stuck to these versions until Mint 19 / Ubuntu bionic are released.

Nevertheless, this problem was not present with older vaapidevice/softhddevice versions, and therefore I am not sure if my Xserver and libva are too blame here.