Greetings, I am having trouble figuring out a very strange problem I'm
seeing. I have a Raspberry Pi 4B connected via HDMI to a LG projector.
I have no trouble turning the projector on using the following
commands:
cec-ctl -d0 --tv --cec-version-1.4
cec-ctl -d0 -t0 --image-view-on
I'm using CEC version 1.4 because that is what the projector supports.
I don't know whether that's necessary or contributing. However, if I
try to turn the projector off using standby, I get the following and
the projector does not turn off:
cec-ctl -d0 -t0 -T --standby
CEC_ADAP_G_CAPS returned 0 (Success)
CEC_ADAP_G_PHYS_ADDR returned 0 (Success)
CEC_ADAP_G_LOG_ADDRS returned 0 (Success)
CEC_ADAP_G_CONNECTOR_INFO returned 0 (Success)
Driver Info:
Driver Name : vc4_hdmi
Adapter Name : vc4
Capabilities : 0x0000011e
Logical Addresses
Transmit
Passthrough
Remote Control Support
Connector Info
Driver version : 5.15.84
Available Logical Addresses: 1
DRM Connector Info : card 0, connector 32
Physical Address : f.f.f.f
Logical Address Mask : 0x0000
CEC Version : 1.4
Vendor ID : 0x000c03 (HDMI)
OSD Name : 'TV'
Logical Addresses : 1 (Allow RC Passthrough)
Logical Address : Not Allocated
Primary Device Type : TV
Logical Address Type : TV
Transmit from Unregistered to TV (15 to 0):
STANDBY (0x36)
CEC_TRANSMIT returned -1 (Machine is not on the network)
During this time, if I try to poll the projector, it will succeed.
However, if I monitor events, after a significant amount of time
(appears to be greater than 20 minutes, although this is difficult to
verify because of how long it takes) I go will eventually see the
following:
Event: State Change: PA: 1.0.0.0, LA mask: 0x0000, Conn Info: yes
Timestamp: 30981.428s
Transmitted by Specific to Specific (14 to 14): POLL
Tx, Not Acknowledged (4), Max Retries
Sequence: 21 Tx Timestamp: 30981.561s Tx, Not Acknowledged (4), Max Retries
Event: State Change: PA: 1.0.0.0, LA mask: 0x4000, Conn Info: yes
Timestamp: 30981.561s
Transmitted by Specific to all (14 to 15): REPORT_PHYSICAL_ADDR (0x84):
phys-addr: 1.0.0.0
prim-devtype: tv (0x00)
Sequence: 22 Tx Timestamp: 30981.696s
Transmitted by Specific to all (14 to 15): DEVICE_VENDOR_ID (0x87):
vendor-id: 3075 (0x00000c03)
Sequence: 23 Tx Timestamp: 30981.835s
Received from TV to Specific (0 to 14): FEATURE_ABORT (0x00):
abort-msg: 132 (0x84, REPORT_PHYSICAL_ADDR)
reason: invalid-op (0x03)
Sequence: 0 Rx Timestamp: 30981.949s
Received from TV to Specific (0 to 14): GIVE_OSD_NAME (0x46)
Sequence: 0 Rx Timestamp: 30982.026s
Transmitted by Specific to TV (14 to 0): SET_OSD_NAME (0x47):
name: TV
Sequence: 24 Tx Timestamp: 30982.137s
After this point in time the standby command will succeed and the
projector will turn off. It's quite inconvenient to have to wait over
20 minutes to turn the projector back off again. Any idea how I can
shorten this delay?
