Hello, for 2-3 weeks now I noticed glitches when I play SuperTuxKart : the shadows in most tracks are flickering. Strongly. I mean it really hurts eyes. When I boot the same machine on ubuntu 16.04 I don’t have this flickering nightmare. It does not seem related to kernel since if I boot my 18.04 on 4.15.0-55 problem still occurs. I suspect some update regarding mesa, video-acceleration or xorg-*-intel but don’t really know how to narrow down the culprit… coeur-noir@asgard:~$ lspci -k | grep -A 2 -i "VGA" 00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06) Subsystem: ASUSTeK Computer Inc. Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller Kernel driver in use: i915 coeur-noir@asgard:~$ sudo lshw -c video *-display description: VGA compatible controller produit: Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller fabriquant: Intel Corporation identifiant matériel: 2 information bus: pci@0000:00:02.0 version: 06 bits: 64 bits horloge: 33MHz fonctionnalités: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 ressources: irq:26 mémoire:f7800000-f7bfffff mémoire:e0000000-efffffff portE/S:f000(taille=64) mémoire:c0000-dffff coeur-noir@asgard:~$ Processor is Intel® Core™ i7-4770K CPU @ 3.50GHz I don’t use any ppa regarding drivers, only using official repositories.

New mesa stack but, still flickering… coeur-noir@asgard:~$ dpkg -l | grep mesa ii libegl-mesa0:amd64 19.0.8-0ubuntu0~18.04.1 amd64 free implementation of the EGL API -- Mesa vendor library ii libegl1-mesa:amd64 19.0.8-0ubuntu0~18.04.1 amd64 transitional dummy package ii libgl1-mesa-dri:amd64 19.0.8-0ubuntu0~18.04.1 amd64 free implementation of the OpenGL API -- DRI modules ii libgl1-mesa-dri:i386 19.0.8-0ubuntu0~18.04.1 i386 free implementation of the OpenGL API -- DRI modules ii libgl1-mesa-glx:amd64 19.0.8-0ubuntu0~18.04.1 amd64 transitional dummy package ii libgl1-mesa-glx:i386 19.0.8-0ubuntu0~18.04.1 i386 transitional dummy package ii libglapi-mesa:amd64 19.0.8-0ubuntu0~18.04.1 amd64 free implementation of the GL API -- shared library ii libglapi-mesa:i386 19.0.8-0ubuntu0~18.04.1 i386 free implementation of the GL API -- shared library ii libgles2-mesa:amd64 19.0.8-0ubuntu0~18.04.1 amd64 transitional dummy package ii libglu1-mesa:amd64 9.0.0-2.1build1 amd64 Mesa OpenGL utility library (GLU) ii libglu1-mesa:i386 9.0.0-2.1build1 i386 Mesa OpenGL utility library (GLU) ii libglx-mesa0:amd64 19.0.8-0ubuntu0~18.04.1 amd64 free implementation of the OpenGL API -- GLX vendor library ii libglx-mesa0:i386 19.0.8-0ubuntu0~18.04.1 i386 free implementation of the OpenGL API -- GLX vendor library ii libosmesa6:amd64 19.0.8-0ubuntu0~18.04.1 amd64 Mesa Off-screen rendering extension ii libosmesa6:i386 19.0.8-0ubuntu0~18.04.1 i386 Mesa Off-screen rendering extension ii libwayland-egl1-mesa:amd64 19.0.8-0ubuntu0~18.04.1 amd64 transitional dummy package ii mesa-utils 8.4.0-1 amd64 Miscellaneous Mesa GL utilities ii mesa-utils-extra 8.4.0-1 amd64 Miscellaneous Mesa utilies (opengles, egl) ii mesa-va-drivers:amd64 19.0.8-0ubuntu0~18.04.1 amd64 Mesa VA-API video acceleration drivers ii mesa-vdpau-drivers:amd64 19.0.8-0ubuntu0~18.04.1 amd64 Mesa VDPAU video acceleration drivers coeur-noir@asgard:~$ Also tried with newer mesa driver from padoka’s ppa but not better : coeur-noir@asgard:~$ dpkg -l | grep mesa ii libegl-mesa0:amd64 19.1.2-0~b~padoka0 amd64 free implementation of the EGL API -- Mesa vendor library ii libegl1-mesa:amd64 19.1.2-0~b~padoka0 amd64 transitional dummy package ii libgl1-mesa-dri:amd64 19.1.2-0~b~padoka0 amd64 free implementation of the OpenGL API -- DRI modules ii libgl1-mesa-dri:i386 19.1.2-0~b~padoka0 i386 free implementation of the OpenGL API -- DRI modules ii libgl1-mesa-glx:amd64 19.1.2-0~b~padoka0 amd64 transitional dummy package ii libgl1-mesa-glx:i386 19.1.2-0~b~padoka0 i386 transitional dummy package ii libglapi-mesa:amd64 19.1.2-0~b~padoka0 amd64 free implementation of the GL API -- shared library ii libglapi-mesa:i386 19.1.2-0~b~padoka0 i386 free implementation of the GL API -- shared library ii libgles2-mesa:amd64 19.1.2-0~b~padoka0 amd64 transitional dummy package ii libglu1-mesa:amd64 9.0.0-2.1build1 amd64 Mesa OpenGL utility library (GLU) ii libglu1-mesa:i386 9.0.0-2.1build1 i386 Mesa OpenGL utility library (GLU) ii libglx-mesa0:amd64 19.1.2-0~b~padoka0 amd64 free implementation of the OpenGL API -- GLX vendor library ii libglx-mesa0:i386 19.1.2-0~b~padoka0 i386 free implementation of the OpenGL API -- GLX vendor library ii libosmesa6:amd64 19.1.2-0~b~padoka0 amd64 Mesa Off-screen rendering extension ii libosmesa6:i386 19.1.2-0~b~padoka0 i386 Mesa Off-screen rendering extension ii libwayland-egl1-mesa:amd64 19.1.2-0~b~padoka0 amd64 transitional dummy package ii mesa-utils 8.4.0-1 amd64 Miscellaneous Mesa GL utilities ii mesa-utils-extra 8.4.0-1 amd64 Miscellaneous Mesa utilies (opengles, egl) ii mesa-va-drivers:amd64 19.1.2-0~b~padoka0 amd64 Mesa VA-API video acceleration drivers ii mesa-vdpau-drivers:amd64 19.1.2-0~b~padoka0 amd64 Mesa VDPAU video acceleration drivers coeur-noir@asgard:~$

What did the supertux team recommend ?

Does disabling shadows etc work better? [image] Issue: Adding CLI options to toggle shadows/lights/etc opened by samuncle on 2015-04-22 closed by auriamg on 2016-06-09 We should have a way to change the default configuration by CLI option (maybe an option to load an alternate file,... P3: normal T: enhancement T:for beginners

Wait… I don’t want to change my quite already low graphic options for STK in 18.04. STK with same options and same hardware works fine in 16.04 - and used to work fine in 18.04 until weeks ago. On Github Benau said : there really isn’t much thing we can do, you need to pray mesa to fix their bug soon,… or I rewrite STK reneder engin with VK later so it may behave differently Here I am facing a regression but I don’t know whom / where ask help…

So upstream mesa guys :frowning: Not a lot you can do I’m afraid - they are the ones that write the graphics compatibility. So its a specific issue with intel graphics. Probably amd/nvidia will behave better.

Coming from Graphics flickering issue 19.04 Adding a file /etc/X11/xorg.conf.d/20-intel-graphics.conf containing Section "Device" Identifier "Intel Graphics" Driver "intel" Option "TripleBuffer" "true" Option "TearFree" "true" EndSection seems to fix my flickering issue sor far… time will tell. and no, not fixed… It seemed to have an effect on flickering ( maybe less frequent, maybe less flashy ) but still there.

Hi I tried that with the tripplebuffer a d all.it managed to.achieve for me was a very slow refresh rate and general slowing if the system from what I could see

Mine.was also general video driver use not gaming

Today mesa packages are : coeur-noir@asgard:~$ dpkg -l | grep mesa ii libegl-mesa0:amd64 19.0.8-0ubuntu0~18.04.3 amd64 free implementation of the EGL API -- Mesa vendor library ii libegl1-mesa:amd64 19.0.8-0ubuntu0~18.04.3 amd64 transitional dummy package ii libgl1-mesa-dri:amd64 19.0.8-0ubuntu0~18.04.3 amd64 free implementation of the OpenGL API -- DRI modules ii libgl1-mesa-dri:i386 19.0.8-0ubuntu0~18.04.3 i386 free implementation of the OpenGL API -- DRI modules ii libgl1-mesa-glx:amd64 19.0.8-0ubuntu0~18.04.3 amd64 transitional dummy package ii libgl1-mesa-glx:i386 19.0.8-0ubuntu0~18.04.3 i386 transitional dummy package ii libglapi-mesa:amd64 19.0.8-0ubuntu0~18.04.3 amd64 free implementation of the GL API -- shared library ii libglapi-mesa:i386 19.0.8-0ubuntu0~18.04.3 i386 free implementation of the GL API -- shared library ii libgles2-mesa:amd64 19.0.8-0ubuntu0~18.04.3 amd64 transitional dummy package ii libglu1-mesa:amd64 9.0.0-2.1build1 amd64 Mesa OpenGL utility library (GLU) ii libglu1-mesa:i386 9.0.0-2.1build1 i386 Mesa OpenGL utility library (GLU) ii libglx-mesa0:amd64 19.0.8-0ubuntu0~18.04.3 amd64 free implementation of the OpenGL API -- GLX vendor library ii libglx-mesa0:i386 19.0.8-0ubuntu0~18.04.3 i386 free implementation of the OpenGL API -- GLX vendor library ii libosmesa6:amd64 19.0.8-0ubuntu0~18.04.3 amd64 Mesa Off-screen rendering extension ii libosmesa6:i386 19.0.8-0ubuntu0~18.04.3 i386 Mesa Off-screen rendering extension ii libwayland-egl1-mesa:amd64 19.0.8-0ubuntu0~18.04.3 amd64 transitional dummy package ii mesa-utils 8.4.0-1 amd64 Miscellaneous Mesa GL utilities ii mesa-utils-extra 8.4.0-1 amd64 Miscellaneous Mesa utilies (opengles, egl) ii mesa-va-drivers:amd64 19.0.8-0ubuntu0~18.04.3 amd64 Mesa VA-API video acceleration drivers ii mesa-vdpau-drivers:amd64 19.0.8-0ubuntu0~18.04.3 amd64 Mesa VDPAU video acceleration drivers coeur-noir@asgard:~$ …but no more luck, flickering shadows are still there. Some people suggested to try with wayland instead of xorg. How do we do that in Budgie, is it safe ?

SuperTuxKart in 18.04 : flickering shadows with intel i915

General

Coeur-Noir August 29, 2019, 3:15pm 11

Well… https://bugs.launchpad.net/mesa/+bug/1841953

Graphics flickering issue 19.04

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SuperTuxKart in 18.04 : flickering shadows with intel i915

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