Ubuntu 14.04 中 HDMI 不显示外接显示器

Question

使用 VGA 连接笔记本电脑的外接显示器工作正常，但使用 HDMI 连接时却不工作。将显示器和 HDMI 电缆插入 Windows 笔记本电脑时工作正常。

屏幕在 中被检测到Displays。 屏幕未检测到nvidia-settings 附加驱动程序设置如下 lspci输出 如下

~$ lspci -vnn | grep -i VGA -A 12
00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
    Subsystem: Sony Corporation Device [104d:905a]
    Flags: bus master, fast devsel, latency 0, IRQ 45
    Memory at d1400000 (64-bit, non-prefetchable) [size=4M]
    Memory at c0000000 (64-bit, prefetchable) [size=256M]
    I/O ports at 7078 [size=8]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: <access denied>
    Kernel driver in use: i915

00:16.0 Communication controller [0780]: Intel Corporation 5 Series/3400 Series Chipset HECI Controller [8086:3b64] (rev 06)
    Subsystem: Sony Corporation Device [104d:905a]
    Flags: bus master, fast devsel, latency 0, IRQ 43
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT216M [GeForce GT 330M] [10de:0a2b] (rev a2) (prog-if 00 [VGA controller])
    Subsystem: Sony Corporation Device [104d:905a]
    Flags: bus master, fast devsel, latency 0, IRQ 47
    Memory at d0000000 (32-bit, non-prefetchable) [size=16M]
    Memory at a0000000 (64-bit, prefetchable) [size=256M]
    Memory at b0000000 (64-bit, prefetchable) [size=32M]
    I/O ports at 6000 [size=128]
    [virtual] Expansion ROM at d1080000 [disabled] [size=512K]
    Capabilities: <access denied>
    Kernel driver in use: nvidia

01:00.1 Audio device [0403]: NVIDIA Corporation GT216 HDMI Audio Controller [10de:0be2] (rev a1)
    Subsystem: Sony Corporation Device [104d:905a]