Google meet and slack show a black screen when sharing

Google meet and slack show a black screen when sharing my screen, i hav no idea where to start looking, i have the free drivers

lspci
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)

mhwd -l -d

PCI Device: /devices/pci0000:00/0000:00:01.0/0000:01:00.0 (0300:1002:6606)
Display controller ATI Technologies Inc Mars XTX [Radeon HD 8790M]
INSTALLED:
NAME: video-linux
ATTACHED: PCI
VERSION: 2018.05.04
INFO: Standard open source drivers.
PRIORITY: 2
FREEDRIVER: true
DEPENDS: -
CONFLICTS: -
CLASSIDS: 0300 0380 0302
VENDORIDS: 1002 8086 10de

PCI Device: /devices/pci0000:00/0000:00:02.0 (0300:8086:0416)
Display controller Intel Corporation 4th Gen Core Processor Integrated Graphics Controller
INSTALLED:
NAME: video-linux
ATTACHED: PCI
VERSION: 2018.05.04
INFO: Standard open source drivers.
PRIORITY: 2
FREEDRIVER: true
DEPENDS: -
CONFLICTS: -
CLASSIDS: 0300 0380 0302
VENDORIDS: 1002 8086 10de