** Also affects: xserver-xorg-video-intel
   Importance: Undecided
       Status: New

** Package changed: mesa (Ubuntu) => mesa

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https://bugs.launchpad.net/bugs/1841953

Title:
  Bionic ⋅ SuperTuxKart ⋅ Flickering shadows ⋅ Haswell i915

Status in Mesa:
  New
Status in xf86-video-intel:
  New

Bug description:
  Hi,

  for few weeks now, I've noticed a big change in graphic performance
  while playing famous SuperTuxKart on ubuntu bionic :

  shadows are flickering, all over the screen, it's a big pain for eyes
  ( and wonder what would happen for epileptic people ).

  My computer is :
  Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz with 16Go ram and Haswell integrated 
graphics.
  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:~$

  My Ubuntu Budgie 18.04 is :
  coeur-noir@asgard:~$ lsb_release -rd
  Description:  Ubuntu 18.04.3 LTS
  Release:      18.04
  coeur-noir@asgard:~$ uname -a
  Linux asgard 5.0.0-23-generic #24~18.04.1-Ubuntu SMP Mon Jul 29 16:12:28 UTC 
2019 x86_64 x86_64 x86_64 GNU/Linux
  coeur-noir@asgard:~$ 

  mesa packages are :
  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:~$ 

  SuperTuxKart version is :
  coeur-noir@asgard:~$ dpkg -l | grep supertu
  ii  supertuxkart                            1.0~ubuntu18.04.1                 
            amd64        3D kart racing game
  ii  supertuxkart-data                       1.0~ubuntu18.04.1                 
            all          3D kart racing game (data)
  coeur-noir@asgard:~$ 

  IMPORTANT NOTE #1 : I don't have this « flickering problem » on the same 
computer when booting ubuntu unity 16.04 !!!
  There, is the same SuperTuxKart version but mesa packages are :
  coeurnoir@Asgard:~$ dpkg -l | grep mesa
  ii  libegl1-mesa:amd64                          18.0.5-0ubuntu0~16.04.1       
               amd64        free implementation of the EGL API -- runtime
  ii  libegl1-mesa:i386                           18.0.5-0ubuntu0~16.04.1       
               i386         free implementation of the EGL API -- runtime
  ii  libegl1-mesa-drivers:amd64                  12.0.6-0ubuntu0.16.04.1       
               amd64        transitional dummy package
  ii  libgl1-mesa-dri:amd64                       18.0.5-0ubuntu0~16.04.1       
               amd64        free implementation of the OpenGL API -- DRI modules
  ii  libgl1-mesa-dri:i386                        18.0.5-0ubuntu0~16.04.1       
               i386         free implementation of the OpenGL API -- DRI modules
  ii  libgl1-mesa-glx:amd64                       18.0.5-0ubuntu0~16.04.1       
               amd64        free implementation of the OpenGL API -- GLX runtime
  ii  libgl1-mesa-glx:i386                        18.0.5-0ubuntu0~16.04.1       
               i386         free implementation of the OpenGL API -- GLX runtime
  ii  libglapi-mesa:amd64                         18.0.5-0ubuntu0~16.04.1       
               amd64        free implementation of the GL API -- shared library
  ii  libglapi-mesa:i386                          18.0.5-0ubuntu0~16.04.1       
               i386         free implementation of the GL API -- shared library
  ii  libgles1-mesa                               18.0.5-0ubuntu0~16.04.1       
               all          transitional dummy package
  ii  libgles2-mesa:amd64                         18.0.5-0ubuntu0~16.04.1       
               amd64        free implementation of the OpenGL|ES 2.x API -- 
runtime
  ii  libglu1-mesa:amd64                          9.0.0-2.1                     
               amd64        Mesa OpenGL utility library (GLU)
  ii  libglu1-mesa:i386                           9.0.0-2.1                     
               i386         Mesa OpenGL utility library (GLU)
  ii  libosmesa6:amd64                            18.0.5-0ubuntu0~16.04.1       
               amd64        Mesa Off-screen rendering extension
  ii  libosmesa6:i386                             18.0.5-0ubuntu0~16.04.1       
               i386         Mesa Off-screen rendering extension
  ii  libwayland-egl1-mesa:amd64                  18.0.5-0ubuntu0~16.04.1       
               amd64        implementation of the Wayland EGL platform -- 
runtime
  ii  libwayland-egl1-mesa:i386                   18.0.5-0ubuntu0~16.04.1       
               i386         implementation of the Wayland EGL platform -- 
runtime
  ii  mesa-utils                                  8.3.0-1                       
               amd64        Miscellaneous Mesa GL utilities
  ii  mesa-va-drivers:amd64                       18.0.5-0ubuntu0~16.04.1       
               amd64        Mesa VA-API video acceleration drivers
  ii  mesa-vdpau-drivers:amd64                    18.0.5-0ubuntu0~16.04.1       
               amd64        Mesa VDPAU video acceleration drivers
  coeurnoir@Asgard:~$ 

  IMPORTANT NOTE #2 :
  I have also tried newer version of mesa through padoka's ppa ( 
https://launchpad.net/~paulo-miguel-dias/+archive/ubuntu/pkppa?field.series_filter=bionic
 ) on 18.04 but it did not change anything.

  For reference, links to forums where I've asked for help :
  ⋅ 
https://discourse.ubuntubudgie.org/t/supertuxkart-in-18-04-flickering-shadows-with-intel-i915/https://github.com/supertuxkart/stk-code/issues/4022
  ⋅ ( french ) https://forum.ubuntu-fr.org/viewtopic.php?pid=22142775#p22142775

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