Determine which vga driver is in use

lapx: # lspci -nnk |grep -A3 VGA
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Thames [Radeon HD 7550M/7570M/7650M] [1002:6841]
        DeviceName: 0
        Subsystem: Hewlett-Packard Company Device [103c:17a9]
        Kernel driver in use: radeon

lesie:~ # lspci -nnk |grep -A3 VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07)
        Subsystem: Lenovo Device [17aa:396b]
        Kernel driver in use: i915
        Kernel modules: i915

amd64:~ # lspci -nnk |grep -A3 VGA
00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Richland [Radeon HD 8570D] [1002:990e]
        Subsystem: ASRock Incorporation Device [1849:990e]
        Kernel driver in use: radeon
        Kernel modules: radeon