Created attachment 126952 [details]
Xorg.0.log

Removing libxcb.so.1 [1] from steam-runtime helps to stop freeze for Viridi, but not so much for other games. In fact I've removed all library files that already exists on my system F25 using following command, but games still freezes.

cd ~/.local/share/Steam/ubuntu12_32/steam-runtime/amd64/usr/lib/x86_64-linux-gnu/; for fn in $(find -maxdepth 1 -type l | cut -f2 -d/); do if [ -f /usr/lib64/$fn ]; then mv $fn* ~/debug/steamlib-removed/; fi; done

That resulted in moving following files moved:
$ ls ~/debug/steamlib-removed/
libasound.so.2                     libgudev-1.0.so.0              libvorbisfile.so.3.3.4
libasound.so.2.0.0                 libgudev-1.0.so.0.1.1          libvorbis.so.0
libasyncns.so.0                    libICE.so.6                    libvorbis.so.0.4.5
libasyncns.so.0.3.1                libICE.so.6.3.0                libX11.so.6
libatk-1.0.so.0                    libidn.so.11                   libX11.so.6.3.0
libatk-1.0.so.0.20409.1            libidn.so.11.6.6               libX11-xcb.so.1
libavahi-client.so.3               libjacknet.so.0                libX11-xcb.so.1.0.0
libavahi-client.so.3.2.9           libjacknet.so.0.1.0            libXau.so.6
libavahi-common.so.3               libjack.so.0                   libXau.so.6.0.0
libavahi-common.so.3.5.3           libjack.so.0.1.0               libxcb-composite.so.0
libcairo.so.2                      libjpeg.so.62                  libxcb-composite.so.0.0.0
libcairo.so.2.11000.2              libjpeg.so.62.0.0              libxcb-damage.so.0
libcanberra-gtk.so.0               libk5crypto.so.3               libxcb-damage.so.0.0.0
libcanberra-gtk.so.0.1.8           libk5crypto.so.3.1             libxcb-dpms.so.0
libcanberra.so.0                   libkrb5.so.3                   libxcb-dpms.so.0.0.0
libcanberra.so.0.2.5               libkrb5.so.3.3                 libxcb-dri2.so.0
libcurl.so.4                       libkrb5support.so.0            libxcb-dri2.so.0.0.0
libcurl.so.4.2.0                   libkrb5support.so.0.1          libxcb-dri3.so.0
libdbus-glib-1.so.2                liblber-2.4.so.2               libxcb-dri3.so.0.0.0
libdbus-glib-1.so.2.2.2            liblber-2.4.so.2.8.1           libxcb-glx.so.0
libexif.so.12                      liblcms2.so.2                  libxcb-glx.so.0.0.0
libexif.so.12.3.2                  liblcms2.so.2.0.2              libxcb-present.so.0
libffi.so.6                        libldap-2.4.so.2               libxcb-present.so.0.0.0
libffi.so.6.0.0                    libldap_r-2.4.so.2             libxcb-randr.so.0
libFLAC.so.8                       libldap_r-2.4.so.2.8.1         libxcb-randr.so.0.1.0
libFLAC.so.8.2.0                   libltdl.so.7                   libxcb-record.so.0
libfontconfig.so.1                 libltdl.so.7.3.0               libxcb-record.so.0.0.0
libfontconfig.so.1.4.4             libnotify.so.4                 libxcb-render.so.0
libfreetype.so.6                   libnotify.so.4.0.0             libxcb-render.so.0.0.0
libfreetype.so.6.8.0               libogg.so.0                    libxcb-res.so.0
libgconf-2.so.4                    libogg.so.0.7.1                libxcb-res.so.0.0.0
libgconf-2.so.4.1.5                libopenal.so.1                 libxcb-screensaver.so.0
libgdk_pixbuf-2.0.so.0             libopenal.so.1.13.0            libxcb-screensaver.so.0.0.0
libgdk_pixbuf-2.0.so.0.2600.1      liborc-0.4.so.0                libxcb-shape.so.0
libgdk-x11-2.0.so.0                liborc-0.4.so.0.16.0           libxcb-shape.so.0.0.0
libgdk-x11-2.0.so.0.2400.10        liborc-test-0.4.so.0           libxcb-shm.so.0
libgio-2.0.so.0                    liborc-test-0.4.so.0.16.0      libxcb-shm.so.0.0.0
libgio-2.0.so.0.3200.3             libp11-kit.so.0                libxcb.so.1
libGLU.so.1                        libp11-kit.so.0.0.0            libxcb.so.1.1.0
libGLU.so.1.3.08004                libpango-1.0.so.0              libxcb-sync.so.1
libglut.so.3                       libpango-1.0.so.0.3000.0       libxcb-sync.so.1.0.0
libglut.so.3.9.0                   libpangocairo-1.0.so.0         libxcb-xf86dri.so.0
libgmodule-2.0.so.0                libpangocairo-1.0.so.0.3000.0  libxcb-xf86dri.so.0.0.0
libgmodule-2.0.so.0.3200.3         libpangoft2-1.0.so.0           libxcb-xfixes.so.0
libgmp.so.10                       libpangoft2-1.0.so.0.3000.0    libxcb-xfixes.so.0.0.0
libgmp.so.10.0.2                   libpangoxft-1.0.so.0           libxcb-xinerama.so.0
libgobject-2.0.so.0                libpangoxft-1.0.so.0.3000.0    libxcb-xinerama.so.0.0.0
libgobject-2.0.so.0.3200.3         libpixman-1.so.0               libxcb-xkb.so.1
libgomp.so.1                       libpixman-1.so.0.30.2          libxcb-xkb.so.1.0.0
libgomp.so.1.0.0                   libpulse-simple.so.0           libxcb-xtest.so.0
libgssapi_krb5.so.2                libpulse-simple.so.0.0.3       libxcb-xtest.so.0.0.0
libgssapi_krb5.so.2.2              libpulse.so.0                  libxcb-xvmc.so.0
libgstapp-0.10.so.0                libpulse.so.0.13.5             libxcb-xvmc.so.0.0.0
libgstapp-0.10.so.0.25.0           libsamplerate.so.0             libxcb-xv.so.0
libgstaudio-0.10.so.0              libsamplerate.so.0.1.8         libxcb-xv.so.0.0.0
libgstaudio-0.10.so.0.25.0         libSDL-1.2.so.0                libXcomposite.so.1
libgstbase-0.10.so.0               libSDL-1.2.so.0.11.4           libXcomposite.so.1.0.0
libgstbase-0.10.so.0.30.0          libSDL2-2.0.so.0               libXcursor.so.1
libgstcdda-0.10.so.0               libSDL2-2.0.so.0.4.0           libXcursor.so.1.0.2
libgstcdda-0.10.so.0.25.0          libSDL_image-1.2.so.0          libXdamage.so.1
libgstcontroller-0.10.so.0         libSDL_image-1.2.so.0.8.2      libXdamage.so.1.1.0
libgstcontroller-0.10.so.0.30.0    libSM.so.6                     libXdmcp.so.6
libgstdataprotocol-0.10.so.0       libSM.so.6.0.1                 libXdmcp.so.6.0.0
libgstdataprotocol-0.10.so.0.30.0  libsndfile.so.1                libXext.so.6
libgstfft-0.10.so.0                libsndfile.so.1.0.25           libXext.so.6.4.0
libgstfft-0.10.so.0.25.0           libspeexdsp.so.1               libXfixes.so.3
libgstinterfaces-0.10.so.0         libspeexdsp.so.1.5.0           libXfixes.so.3.1.0
libgstinterfaces-0.10.so.0.25.0    libspeex.so.1                  libXft.so.2
libgstnet-0.10.so.0                libspeex.so.1.5.0              libXft.so.2.2.0
libgstnet-0.10.so.0.30.0           libsqlite3.so.0                libXinerama.so.1
libgstnetbuffer-0.10.so.0          libsqlite3.so.0.8.6            libXinerama.so.1.0.0
libgstnetbuffer-0.10.so.0.25.0     libstdc++.so.6                 libXi.so.6
libgstpbutils-0.10.so.0            libstdc++.so.6.0.21            libXi.so.6.1.0
libgstpbutils-0.10.so.0.25.0       libtdb.so.1                    libxml2.so.2
libgstreamer-0.10.so.0             libtdb.so.1.2.9                libxml2.so.2.7.8
libgstreamer-0.10.so.0.30.0        libtheoradec.so.1              libXmu.so.6
libgstriff-0.10.so.0               libtheoradec.so.1.1.4          libXmu.so.6.2.0
libgstriff-0.10.so.0.25.0          libtheoraenc.so.1              libXpm.so.4
libgstrtp-0.10.so.0                libtheoraenc.so.1.1.2          libXpm.so.4.11.0
libgstrtp-0.10.so.0.25.0           libtheora.so.0                 libXrandr.so.2
libgstrtsp-0.10.so.0               libtheora.so.0.3.10            libXrandr.so.2.2.0
libgstrtsp-0.10.so.0.25.0          libva-glx.so.1                 libXrender.so.1
libgstsdp-0.10.so.0                libva-glx.so.1.3501.0          libXrender.so.1.3.0
libgstsdp-0.10.so.0.25.0           libva.so.1                     libXss.so.1
libgsttag-0.10.so.0                libva.so.1.3501.0              libXss.so.1.0.0
libgsttag-0.10.so.0.25.0           libva-x11.so.1                 libXt.so.6
libgstvideo-0.10.so.0              libva-x11.so.1.3501.0          libXt.so.6.0.0
libgstvideo-0.10.so.0.25.0         libvdpau.so.1                  libXtst.so.6
libgthread-2.0.so.0                libvdpau.so.1.0.0              libXtst.so.6.1.0
libgthread-2.0.so.0.3200.3         libvorbisenc.so.2              libXxf86vm.so.1
libgtk-x11-2.0.so.0                libvorbisenc.so.2.0.8          libXxf86vm.so.1.0.0
libgtk-x11-2.0.so.0.2400.10        libvorbisfile.so.3


[1] https://bugs.freedesktop.org/show_bug.cgi?id=97890#c5

hi. This is quite old issue, but still I tried to reproduce it.
Configuration:
CPU~Quad core Intel Core i5-6440HQ (SKL)
Kernel~4.17.3-041703-generic x86_64

To be sure that I am using DRI3, I launched games with the flag
LIBGL_DEBUG=verbose, so in cmd I saw output:
libGL: Using DRI3 for screen 0

Tested:
The Stanley Parable- Freeze (in-game settings - All max/high)
Results:
on 17.2.8 x32 mesa I got a lot of gpu hangs, game was extremely unplayable.
on 18.2.0 git (latest) I didn't face any hangs, played for about 20 minutes. So I think that issue was fixed.

AdVenture Capitalis
Results:
neither 17.2.8 nor 18.2.0 didn't reproduce any flickering or freezes.

Samuel, could you please confirm that on latest mesa version AND your PC configuration you also don't see any issues?

upd - also tried on the same configuration Viridi - works fine too.

Sorry for the late reply, I have some distro difficulties testing on the new mesa version. Turns out that it seems I don't even have to. It seems this particular issues was all fixed by an updated Steam Client version where they prefer system libraries better[*]. Tested again with mesa 17.0.5, I could not reproduce the issues mentioned.


[*] https://steamcommunity.com/groups/SteamClientBeta/announcements/detail/586991182161672256