after the last update the brightness controls started working again.
##################### Start-Date: 2020-04-02 10:24:52 Commandline: aptdaemon role='role-commit-packages' sender=':1.117' Upgrade: libegl-mesa0:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libglapi-mesa:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libglapi-mesa:i386 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libxatracker2:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libegl1-mesa:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libgbm1:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libwayland-egl1-mesa:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libgl1-mesa-dri:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libgl1-mesa-dri:i386 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libgl1-mesa-glx:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libgl1-mesa-glx:i386 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), mesa-vdpau-drivers:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), mesa-va-drivers:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libglx-mesa0:amd64 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3), libglx-mesa0:i386 (19.2.8-0ubuntu0~18.04.2, 19.2.8-0ubuntu0~18.04.3) End-Date: 2020-04-02 10:24:55
after the last update the brightness controls started working again.
####### ####### ####### commit- packages' sender=':1.117' 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libglapi-mesa:amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libglapi-mesa:i386 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libxatracker2:amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libegl1-mesa:amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libgbm1:amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libwayland- egl1-mesa: amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libgl1- mesa-dri: amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libgl1- mesa-dri: i386 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libgl1- mesa-glx: amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libgl1- mesa-glx: i386 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , mesa-vdpau- drivers: amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , mesa-va- drivers: amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libglx-mesa0:amd64 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3) , libglx-mesa0:i386 (19.2.8- 0ubuntu0~ 18.04.2, 19.2.8- 0ubuntu0~ 18.04.3)
Start-Date: 2020-04-02 10:24:52
Commandline: aptdaemon role='role-
Upgrade: libegl-mesa0:amd64 (19.2.8-
End-Date: 2020-04-02 10:24:55