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echo 1 > /sys/bus/pci/slots/$4/power bash: /sys/bus/pci/slots//power: 权限被拒绝

tag-icon • tag-icon power-management pci
echo 1 > /sys/bus/pci/slots/$4/power bash: /sys/bus/pci/slots//power: 权限被拒绝

在输入时echo 1 > /sys/bus/pci/slots/$4/power，我收到此错误：

bash: /sys/bus/pci/slots//power: Permission denied

lscpi -vv以下是我的系统上的输出：

02:00.0 Multimedia controller: Digital Devices GmbH Octopus DVB Adapter
        Subsystem: Digital Devices GmbH Cine S2 V6.5 DVB adapter
        Physical Slot: 4
        Flags: fast devsel, IRQ 46
        Memory at c7400000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: [50] Power Management version 3
        Capabilities: [70] MSI: Enable+ Count=2/2 Maskable- 64bit+
        Capabilities: [90] Express Endpoint, MSI 00
        Capabilities: [100] Vendor Specific Information: ID=0000 Rev=0 Len=00c <?>
        Kernel driver in use: ddbridge

06:00.0 Multimedia controller: Digital Devices GmbH Max
        Subsystem: Digital Devices GmbH Max S8 4/8
        Physical Slot: 3
        Flags: fast devsel, IRQ 49
        Memory at c7300000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: [50] Power Management version 3
        Capabilities: [70] MSI: Enable+ Count=2/2 Maskable- 64bit+
        Capabilities: [90] Express Endpoint, MSI 00
        Capabilities: [100] Vendor Specific Information: ID=0000 Rev=0 Len=00c <?>
        Kernel driver in use: ddbridge

答案1

echo不会这样工作。

您需要sudo tee像这样使用来允许权限：

echo 1 | sudo tee /sys/bus/pci/slots/4/power

另外，我认为您可能想要指定插槽 4，也就是 4 而不是 $4。

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