Verifique sua placa gráfica:
lspci | grep -Pi 'vga|3d|2d'
Exemplo de saída
01:00.0 VGA compatible controller: NVIDIA Corporation GK104GLM [Quadro K5000M] (rev a1)
Agora, obtenha mais informações com:
sudo lspci -v -s 01:00.0
Verifique a entrada Kernel driver
De outra forma:
sudo lshw -c video
Exemplo de saída
*-display
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:45 memory:c0000000-c03fffff memory:b0000000-bfffffff ioport:3000(size=64)
Verifique o driver usado com
LANG=C sudo lshw -c video | grep configuration
Exemplo de saída
configuration: driver=i915 latency=0
E verifique os detalhes, por exemplo
modinfo i915