命令行下执行：
$ lshw -c video
看configurure字段有木有driver字样，若有内容，则显卡驱动装好了。
例子：
*-display
description: VGA compatible controller
product: Core Processor Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 02
64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:45 memory:fd000000-fd3fffff memory:d0000000-dfffffff
ioport:1800(size=8)