升级到 Ubuntu 15.04 后系统死机，而不是我在全屏模式下运行（Kodi.tv，大画面模式下的 Steam）。在 htop 中，我看到来自 compiz 的 cpu 使用率为 99%-102%。
须藤 lshw -C 视频
*-display
description: VGA compatible controller
product: GK104 [GeForce GTX 660 Ti]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nvidia latency=0
resources: irq:35 memory:f6000000-f6ffffff memory:e8000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:f7000000-f707ffff
gxinfo | grep -i 字符串
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4
client glx vendor …