$ sudo ppa-purge ppa:kisak/kisak-mesa -y
Updating packages lists
PPA to be removed: kisak kisak-mesa
Package revert list generated:
 libdrm-amdgpu1:amd64- libdrm-amdgpu1:i386- libdrm-common- libdrm-intel1:amd64-
libdrm-intel1:i386- libdrm-nouveau2:amd64- libdrm-nouveau2:i386-
libdrm-radeon1:amd64- libdrm-radeon1:i386- libdrm2:amd64- libdrm2:i386-
libegl-mesa0:amd64- libegl1-mesa-dev:amd64- libgbm1:amd64-
libgl1-mesa-dev:amd64- libgl1-mesa-dri:amd64- libgl1-mesa-dri:i386-
libgl1-mesa-glx:i386- libglapi-mesa:amd64- libglapi-mesa:i386-
libgles2-mesa-dev:amd64- libglx-mesa0:amd64- libglx-mesa0:i386-
libllvm14:amd64- libllvm14:i386- libosmesa6:amd64- libosmesa6:i386-
libva-dev:amd64- libva-drm2:amd64- libva-drm2:i386- libva-glx2:amd64-
libva-wayland2:amd64- libva-x11-2:amd64- libva-x11-2:i386- libva2:amd64-
libva2:i386- libxatracker2:amd64- mesa-va-drivers:amd64- mesa-va-drivers:i386-
mesa-vdpau-drivers:amd64- mesa-vdpau-drivers:i386- mesa-vulkan-drivers:amd64-
mesa-vulkan-drivers:i386- va-driver-all:amd64- va-driver-all:i386-

Disabling kisak PPA from /etc/apt/sources.list.d/kisak-kisak-mesa-focal.list
Updating packages lists
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libegl1 : Depends: libegl-mesa0 but it is not going to be installed
 libqt5svg5 : Depends: libqt5gui5 (>= 5.12.8+dfsg~) but it is not going to be installed or
                       libqt5gui5-gles (>= 5.12.8+dfsg~) but it is not going to be installed
              Depends: libqt5widgets5 (>= 5.12.8+dfsg~) but it is not going to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
The following packages will be REMOVED:
  i965-va-driver:i386{u} intel-media-va-driver:i386{u} libatomic1:i386{u}
  libdrm-amdgpu1 libdrm-amdgpu1:i386 libdrm-common libdrm-intel1
  libdrm-intel1:i386 libdrm-nouveau2 libdrm-nouveau2:i386 libdrm-radeon1
  libdrm-radeon1:i386 libdrm2 libdrm2:i386 libedit2:i386{u} libegl-mesa0
  libegl1-mesa-dev libelf1:i386{u} libgbm1 libgl1-mesa-dev libgl1-mesa-dri
  libgl1-mesa-dri:i386 libgl1-mesa-glx:i386 libglapi-mesa
  libglapi-mesa:i386 libgles2-mesa-dev libglx-mesa0 libglx-mesa0:i386
  libigdgmm11:i386{u} libllvm14 libllvm14:i386 libosmesa6 libosmesa6:i386
  libpciaccess0:i386{u} libset-scalar-perl{u} libva-dev libva-drm2
  libva-drm2:i386 libva-glx2{u} libva-wayland2 libva-x11-2 libva-x11-2:i386
  libva2 libva2:i386 libx11-xcb1:i386{u} libxatracker2
  libxcb-dri2-0:i386{u} libxcb-glx0:i386{u} libxcb-present0:i386{u}
  libxcb-randr0:i386{u} libxcb-sync1:i386{u} libxcb-xfixes0:i386{u}
  libxshmfence1:i386{u} linux-modules-extra-5.4.0-126-generic{u}
  mesa-va-drivers mesa-va-drivers:i386{u} mesa-vdpau-drivers
  mesa-vdpau-drivers:i386 mesa-vulkan-drivers mesa-vulkan-drivers:i386
  va-driver-all va-driver-all:i386{u}
0 packages upgraded, 0 newly installed, 62 to remove and 2 not upgraded.
Need to get 0 B of archives. After unpacking 1.357 MB will be freed.
The following packages have unmet dependencies:
 libmpv1 : Depends: libdrm2 (>= 2.4.74) but it is not going to be installed
           Depends: libgbm1 (>= 8.1~0) but it is not going to be installed
           Depends: libva-drm2 (>= 1.1.0) but it is not going to be installed
           Depends: libva-wayland2 (>= 1.3.0) but it is not going to be installed
           Depends: libva-x11-2 (>= 1.0.3) but it is not going to be installed
           Depends: libva2 (>= 2.2.0) but it is not going to be installed
 vlc-plugin-video-output : Depends: libva-drm2 (>= 1.1.0) but it is not going to be installed
                           Depends: libva-wayland2 (>= 1.3.0) but it is not going to be installed
                           Depends: libva-x11-2 (>= 1.0.3) but it is not going to be installed
                           Depends: libva2 (>= 2.2.0) but it is not going to be installed
 libcogl20 : Depends: libdrm2 (>= 2.4.17) but it is not going to be installed
             Depends: libgbm1 (>= 8.1~0) but it is not going to be installed
 libavfilter7 : Depends: libva2 (>= 1.7.3) but it is not going to be installed
 xserver-xorg-video-nouveau : Depends: libdrm-nouveau2 (>= 2.4.38) but it is not going to be installed
                              Depends: libdrm2 (>= 2.4.61) but it is not going to be installed
 xserver-xorg-video-amdgpu : Depends: libdrm-amdgpu1 (>= 2.4.73) but it is not going to be installed
                             Depends: libgbm1 (>= 8.1~0) but it is not going to be installed
 brave-browser : Depends: libdrm2 (>= 2.4.60) but it is not going to be installed
                 Depends: libgbm1 (>= 8.1~0) but it is not going to be installed
 libepoxy-dev : Depends: libegl1-mesa-dev but it is not going to be installed
                Depends: libgl1-mesa-dev but it is not going to be installed
 libegl1 : Depends: libegl-mesa0 but it is not going to be installed
 xserver-xorg-core : Depends: libdrm2 (>= 2.4.66) but it is not going to be installed
                     Depends: libgbm1 (>= 17.1.0~rc2) but it is not going to be installed
 qml-module-qtquick2 : Depends: libgl1-mesa-dri but it is not going to be installed
 codium : Depends: libdrm2 (>= 2.4.38) but it is not going to be installed
          Depends: libgbm1 (>= 8.1~0) but it is not going to be installed
 skypeforlinux : Depends: libdrm2 (>= 2.4.38) but it is not going to be installed
                 Depends: libgbm1 (>= 17.1.0~rc2) but it is not going to be installed
 gstreamer1.0-plugins-bad : Depends: libdrm2 (>= 2.4.47) but it is not going to be installed
 libsdl2-dev : Depends: libegl1-mesa-dev but it is not going to be installed
               Depends: libgl1-mesa-dev but it is not going to be installed
               Depends: libgles2-mesa-dev but it is not going to be installed
 vdpau-driver-all:i386 : Depends: mesa-vdpau-drivers:i386 but it is not going to be installed
 libqt5gui5 : Depends: libdrm2 (>= 2.4.62) but it is not going to be installed
              Depends: libgbm1 (>= 8.1~0) but it is not going to be installed
 ubuntu-drivers-common : Depends: libdrm2 (>= 2.3.1) but it is not going to be installed
 steam:i386 : Depends: libgl1-mesa-dri:i386 (>= 17.3) but it is not going to be installed or
                       libtxc-dxtn0:i386 which is a virtual package and is not provided by any available package

              Depends: libgl1-mesa-glx:i386 but it is not going to be installed
 libgtk-3-dev : Depends: libegl1-mesa-dev but it is not going to be installed
 libgstreamer-gl1.0-0 : Depends: libdrm2 (>= 2.4.17) but it is not going to be installed
                        Depends: libgbm1 (>= 8.1~0) but it is not going to be installed
 xserver-xorg-video-intel : Depends: libdrm-intel1 (>= 2.4.38) but it is not going to be installed
                            Depends: libdrm2 (>= 2.4.62) but it is not going to be installed
 xserver-xorg-video-vmware : Depends: libdrm2 (>= 2.4.60) but it is not going to be installed
                             Depends: libxatracker2 (>= 11.1.0~) but it is not going to be installed
 libavutil56 : Depends: libdrm2 (>= 2.3.1) but it is not going to be installed
               Depends: libva-drm2 (>= 1.3) but it is not going to be installed
               Depends: libva-x11-2 (>= 1.3) but it is not going to be installed
               Depends: libva2 (>= 2.1.0) but it is not going to be installed
 libavutil56:i386 : Depends: libdrm2:i386 (>= 2.3.1) but it is not going to be installed
                    Depends: libva-drm2:i386 (>= 1.3) but it is not going to be installed
                    Depends: libva-x11-2:i386 (>= 1.3) but it is not going to be installed
                    Depends: libva2:i386 (>= 2.1.0) but it is not going to be installed
 xwayland : Depends: libdrm2 (>= 2.4.75) but it is not going to be installed
            Depends: libgbm1 (>= 17.1.0~rc2) but it is not going to be installed
 libglx0 : Depends: libglx-mesa0 but it is not going to be installed
 libglx0:i386 : Depends: libglx-mesa0:i386 but it is not going to be installed
 libavdevice58 : Depends: libdrm2 (>= 2.4.47) but it is not going to be installed
 xorg : Depends: libgl1-mesa-dri but it is not going to be installed
 plymouth : Depends: libdrm2 (>= 2.4.47) but it is not going to be installed
 xserver-xorg-video-radeon : Depends: libdrm-radeon1 (>= 2.4.39) but it is not going to be installed
                             Depends: libgbm1 (>= 8.1~0) but it is not going to be installed
 intel-media-va-driver : Depends: libva-driver-abi-1.7 which is a virtual package, provided by:
                                  - libva2 (2.14.0-1~kisak1~f), but it is not going to be installed
                                  - libva2 (2.7.0-2), but it is not going to be installed

 libavcodec-extra58 : Depends: libva2 (>= 2.2.0) but it is not going to be installed
 libavcodec-extra58:i386 : Depends: libva2:i386 (>= 2.2.0) but it is not going to be installed
 vlc-plugin-base : Depends: libva-drm2 (>= 1.1.0) but it is not going to be installed
                   Depends: libva2 (>= 2.2.0) but it is not going to be installed
 redshift : Depends: libdrm2 (>= 2.4.3) but it is not going to be installed
 i965-va-driver : Depends: libva-driver-abi-1.6 which is a virtual package, provided by:
                           - libva2 (2.14.0-1~kisak1~f), but it is not going to be installed
                           - libva2 (2.7.0-2), but it is not going to be installed

                  Depends: libdrm-intel1 (>= 2.4.46) but it is not going to be installed
                  Depends: libdrm2 (>= 2.3.1) but it is not going to be installed
 gstreamer1.0-vaapi : Depends: libdrm2 (>= 2.3.1) but it is not going to be installed
                      Depends: libva-drm2 (>= 1.1.0) but it is not going to be installed
                      Depends: libva-wayland2 (>= 1.3.0) but it is not going to be installed
                      Depends: libva-x11-2 (>= 1.0.9) but it is not going to be installed
                      Depends: libva2 (>= 2.2.0) but it is not going to be installed
open: 7557; closed: 104559; defer: 158; conflict: 224                          .No solution found within the allotted time.  Try harder? [Y/n]
Resolving dependencies...
open: 14163; closed: 319561; defer: 181; conflict: 258                         ONo solution found within the allotted time.  Try harder? [Y/n] n
Abandoning all efforts to resolve these dependencies.