我有运行Raspbian的RPi B通过HDMI连接到我的LG电视.我成功编译并安装了cec-client,我可以使用命令echo“on 0”|轻松打开电视cec-client -s,但当我尝试使用命令echo“standby 0”|关闭电视时cec-client -s我得到这个输出：

opening a connection to the CEC adapter...
DEBUG:   [             316]     unregistering all CEC clients
DEBUG:   [             318]     Broadcast (F): osd name set to 'Broadcast'
DEBUG:   [             324]     InitHostCEC - vchiq_initialise succeeded
DEBUG:   [             325]     InitHostCEC - vchi_initialise succeeded
DEBUG:   [             326]     InitHostCEC - vchi_connect succeeded
DEBUG:   [             330]     logical address changed to Broadcast (f)
DEBUG:   [             333]     RegisterLogicalAddress - registering address e
DEBUG:   [             605]     logical address changed to Recorder 1 (1)
DEBUG:   [             605]     logical address changed to Free use (e)
DEBUG:   [             605]     Open - vc_cec initialised
NOTICE:  [             605]     connection opened
DEBUG:   [             607]     processor thread started
DEBUG:   [             608]     << Broadcast (F) -> TV (0): POLL
DEBUG:   [             611]     initiator 'Broadcast' is not supported by the CEC adapter. using 'Free use' instead
TRAFFIC: [             612]     << e0
DEBUG:   [             647]     >> POLL sent
DEBUG:   [             647]     TV (0): device status changed into 'present'
DEBUG:   [             647]     << requesting vendor ID of 'TV' (0)
TRAFFIC: [             647]     << e0:8c
DEBUG:   [            1858]     expected response not received (87: device vendor id)
TRAFFIC: [            1859]     << e0:8c
DEBUG:   [            3070]     expected response not received (87: device vendor id)
NOTICE:  [            3070]     registering new CEC client - v2.1.4
DEBUG:   [            3070]     detecting logical address for type 'recording device'
DEBUG:   [            3070]     trying logical address 'Recorder 1'
DEBUG:   [            3070]     << Recorder 1 (1) -> Recorder 1 (1): POLL
TRAFFIC: [            3071]     << 11
DEBUG:   [            3071]     UnregisterLogicalAddress - releasing prevIoUs logical address
DEBUG:   [            3072]     logical address changed to Broadcast (f)
DEBUG:   [            3073]     RegisterLogicalAddress - registering address 1
DEBUG:   [            3255]     logical address changed to Free use (e)
DEBUG:   [            3255]     logical address changed to Recorder 1 (1)
TRAFFIC: [            3255]     << 11
DEBUG:   [            3255]     >> POLL not sent
DEBUG:   [            3256]     using logical address 'Recorder 1'
DEBUG:   [            3256]     Recorder 1 (1): device status changed into 'handled by libCEC'
DEBUG:   [            3256]     Recorder 1 (1): power status changed from 'unknown' to 'on'
DEBUG:   [            3256]     Recorder 1 (1): vendor = Pulse Eight (001582)
DEBUG:   [            3256]     Recorder 1 (1): CEC version 1.4
DEBUG:   [            3256]     AllocateLogicalAddresses - device '0',type 'recording device',LA '1'
DEBUG:   [            3256]     Recorder 1 (1): osd name set to 'CECTester'
DEBUG:   [            3256]     Recorder 1 (1): menu language set to 'eng'
DEBUG:   [            3258]     GetPhysicalAddress - physical address = 3000
DEBUG:   [            3258]     AutodetectPhysicalAddress - autodetected physical address '3000'
DEBUG:   [            3260]     Recorder 1 (1): physical address changed from ffff to 3000
DEBUG:   [            3262]     << Recorder 1 (1) -> broadcast (F): physical adddress 3000
TRAFFIC: [            3263]     << 1f:84:30:00:01
NOTICE:  [            3415]     CEC client registered: libCEC version = 2.1.4,client version = 2.1.4,firmware version = 1,logical address(es) = Recorder 1 (1),physical address: 3.0.0.0,host: armv6l-unknown-linux-gnueabihf,features: 'P8 USB' 'P8 USB detect' 'RPi',git revision: a560d24,compiled on: Sun Sep 14 17:49:41 UTC 2014 by pi@raspberrypi on Linux 3.12.28+ (armv6l)
DEBUG:   [            3415]     << Recorder 1 (1) -> TV (0): OSD name 'CECTester'
TRAFFIC: [            3415]     << 10:47:43:45:43:54:65:73:74:65:72
DEBUG:   [            3716]     << requesting power status of 'TV' (0)
TRAFFIC: [            3716]     << 10:8f
TRAFFIC: [            3868]     >> 01:8c
DEBUG:   [            3868]     >> TV (0) -> Recorder 1 (1): give device vendor id (8C)
DEBUG:   [            3871]     << Recorder 1 (1) -> TV (0): vendor id Pulse Eight (1582)
TRAFFIC: [            3873]     << 1f:87:00:15:82
TRAFFIC: [            4087]     >> 01:90:00
DEBUG:   [            4087]     >> TV (0) -> Recorder 1 (1): report power status (90)
DEBUG:   [            4088]     TV (0): power status changed from 'unknown' to 'on'
DEBUG:   [            4089]     expected response received (90: report power status)
DEBUG:   [            4091]     << requesting vendor ID of 'TV' (0)
TRAFFIC: [            4091]     << 10:8c
TRAFFIC: [            4323]     >> 0f:87:00:e0:91
DEBUG:   [            4323]     >> TV (0) -> Broadcast (F): device vendor id (87)
DEBUG:   [            4323]     TV (0): vendor = LG (00e091)
DEBUG:   [            4323]     << Recorder 1 (1) -> Broadcast (F): vendor id Pulse Eight (1582)
TRAFFIC: [            4323]     << 1f:87:00:15:82
DEBUG:   [            4474]     expected response received (87: device vendor id)
DEBUG:   [            4475]     replacing the command handler for device 'TV' (0)
DEBUG:   [            4478]     TV (0): CEC version 1.3a
DEBUG:   [            4479]     TV (0): menu language set to 'eng'
DEBUG:   [            4481]     Recorder 1 (1): vendor = LG (00e091)
DEBUG:   [            4485]     replacing the command handler for device 'Recorder 1' (1)
DEBUG:   [            4485]     Recorder 1 (1): CEC version 1.3a
NOTICE:  [            4487]     << putting 'TV' (0) in standby mode
TRAFFIC: [            4488]     << 10:36
DEBUG:   [            4552]     unregistering all CEC clients
NOTICE:  [            4555]     unregistering client: libCEC version = 2.1.4,compiled on: Sun Sep 14 17:49:41 UTC 2014 by pi@raspberrypi on Linux 3.12.28+ (armv6l)
DEBUG:   [            4559]     Recorder 1 (1): power status changed from 'on' to 'unknown'
DEBUG:   [            4561]     Recorder 1 (1): vendor = Unknown (000000)
DEBUG:   [            4564]     Recorder 1 (1): CEC version unknown
DEBUG:   [            4565]     Recorder 1 (1): osd name set to 'Recorder 1'
DEBUG:   [            4567]     Recorder 1 (1): device status changed into 'unknown'
DEBUG:   [            4567]     unregistering all CEC clients
DEBUG:   [            4624]     UnregisterLogicalAddress - releasing prevIoUs logical address
DEBUG:   [            4630]     logical address changed to Broadcast (f)

没有任何反应.此外,我只使用CLI,并在一段时间后RPi将电视放入空白屏幕保护程序,但我无法弄清楚如何在我的命令下立即执行此操作.