HDMI_CEC configuration error

benquan · January 30, 2017, 5:55pm

I’ve been trying to install HDMI_CEC but keep getting errors.

First libcec is properly installed and it runs fine from command line. I can turn a TV off and more. Also gave video permission to user homeassistant. But when I include:

hdmi_cec:
  devices:
    1: Pi Home Assistant
    2: Playstation 4
    3: Mac

in my configuration.yaml I get the following error in the log:

17-01-30 17:45:35 ERROR (MainThread) [homeassistant.bootstrap] Error during setup of component hdmi_cec
Traceback (most recent call last):
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/bootstrap.py", line 151, in _async_setup_component
    None, component.setup, hass, config)
  File "/usr/lib/python3.4/asyncio/futures.py", line 388, in __iter__
    yield self  # This tells Task to wait for completion.
  File "/usr/lib/python3.4/asyncio/tasks.py", line 286, in _wakeup
    value = future.result()
  File "/usr/lib/python3.4/asyncio/futures.py", line 277, in result
    raise self._exception
  File "/usr/lib/python3.4/concurrent/futures/thread.py", line 54, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/components/hdmi_cec.py", line 189, in setup
    adapter = CecAdapter(name=display_name, activate_source=False)
  File "/home/homeassistant/.homeassistant/deps/pycec/cec.py", line 20, in __init__
    import cec
ImportError: No module named 'cec'

Any advice?

rpitera · January 30, 2017, 6:48pm

What version of Python are you running?

benquan · January 30, 2017, 7:19pm

Python 3.4.2 in the virtual environment

Python 2.7.9 in the raspberry pi

rpitera · January 30, 2017, 7:27pm

I asked because I found this in a search:

I don’t use HDMI-CEC in my setup so I can’t help you too much with it, but I was hoping this might be the answer.

benquan · January 30, 2017, 7:42pm

I had already read it but that is a different issue

SmartValley · January 30, 2017, 10:34pm

I assume you are able to turn on and off TV through terminal and not through HA? If not, do you see hdmi_cec domain in developer tools?

What does command echo scan | cec-client -s -d 1 return for you in terminal?

benquan · January 30, 2017, 11:01pm

Yes command line works fine:

(homeassistant) homeassistant@raspberrypi:~/.homeassistant$ echo scan | cec-client -s -d 1
opening a connection to the CEC adapter...
requesting CEC bus information ...
CEC bus information
===================
device #0: TV
address:       0.0.0.0
active source: no
vendor:        Samsung
osd string:    TV
CEC version:   1.3a
power status:  on
language:      ???


device #1: Recorder 1
address:       1.0.0.0
active source: no
vendor:        Pulse Eight
osd string:    CECTester
CEC version:   1.4
power status:  on
language:      eng


device #4: Playback 1
address:       2.0.0.0
active source: yes
vendor:        Unknown
osd string:    Playback 1
CEC version:   unknown
power status:  on
language:      ???


currently active source: Playback 1 (4)

MrBramme · February 1, 2017, 7:06am

Yes, the issue I’m facing in the other topic that rpitera linked has to do with limitations due to using Openelec (to my opinion). I haven’t been able to resolve that one yet but if i don’t find an answer soon i’m connecting my HA rpi to a free hdmi slot and that should work as well.
I’d never switch to the HA HDMI channel though, but it should work fine for sending the commands

mrtips · February 1, 2017, 7:55am

Is there a valid sym-link in /path/to/your/venv/lib/python3.4/site-packages/ that points to a version of cec in the system python install?

szaroubi · February 1, 2017, 10:16pm

Sorry, writing from iPad. Formatting and autocorrect are annoying.

I just ran the following and it worked.
homeassistant@pi-smarthome:/srv/homeeassistant/homeassistant_venv/lib/python3.4/site-packages $ ln -s /usr/local/lib/python3.4/site-packages/cec cec

Looks like when I “make install” libcec it placed it in site-packages and not dist-packages

The documentation was off for me.
RPI 2,
latest raspian jessy
Latest libcec (git cloned it)

Link to doc: https://home-assistant.io/components/hdmi_cec/

Link to the libcec guide I used to install:

mrtips · February 1, 2017, 10:59pm

This ties in with what i’m seeing too. Looks like the HASS docs are wrong/out of date.

mrtips · February 2, 2017, 6:12am

created an issue on the hass website github repo here: https://github.com/home-assistant/home-assistant.github.io/issues/1939

and corresponding pull request for the proposed change here: https://github.com/home-assistant/home-assistant.github.io/pull/1940

CBRHerms · February 2, 2017, 4:48pm

Once the symlink was corrected, were you able to run it correctly through homeassistant? i’ve my own issue raised over on github as it appears to be erroring out for me on a fresh raspbian image / aio install

mrtips · February 2, 2017, 9:25pm

@CBRHerms that’s me (matt-cahill) chatting to you on your github issue.

You may need to open a separate issue in the main home-assistant repo for the CEC traceback you are getting.

It looks from your logs that the CEC module is importing properly but the HASS code is making some kind of invalid call. Once the sym-link issue is resolved i think it’s outside the scope of the AiO installer.

CBRHerms · February 2, 2017, 9:36pm

Ahhh whoopsie. Aye, i did open a ticket up on there but as i mentioned there was the AIO issue beforehand it was closed as deemed an AIO issue even though it was a call from HA itself. I’ll move any further correspondence to there.

CBRHerms · February 6, 2017, 1:20am

Found the issue with my own setup at least.

hdmi_cec component doesn’t play nicely if you’ve using the new customize feature in your configuration. i’ve added it to my issue report

mrtips · February 6, 2017, 11:25am

@CBRHerms glad you found the culprit. The docs have been updated too which is good.

MrBramme · February 7, 2017, 12:13pm

I’ve currently connected my HASS raspberry pi to my tv, installed cec and added it to home assistant… but I’ve had to remove it the same day for 2 reasons:

my tv setup (nothing HA can do about it) seems to be an ass when it comes to CEC. i’m using a combo of an hdmi splitter and a hdmi switch to be able to handle my Hyperion ambilight setup from any source. This seems to wreak havoc on CEC commands.
After activating CEC, my HA responsiveness dropped. Simply turning on a light took 3 seconds rather than instant as soon as I activate cec… might have something to do with my setup, might not.

Christian · February 14, 2017, 10:32pm

Thank you guys!
Changing the symlink helped.

I just installed 0.37.1 aio a few days ago.
Did the libcec installiton as described here https://home-assistant.io/components/hdmi_cec/
Did the update to 0.38.2
Couldn’t get cec to run.
ImportError: No module named ‘cec’

matt-cahill comment at https://github.com/home-assistant/fabric-home-assistant/issues/44
finally helped to understand and to solve it.
Changing the sym link from within the venv fixed the problem.

homeassistant@raspberrypi:/home/pi$ source /srv/homeassistant/homeassistant_venv/bin/activate
ln -sf /usr/local/lib/python3.4/site-packages/cec /srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages

CaptainComedy · September 13, 2017, 11:31pm

Hi,
I’m getting a similar issue with the Raspberry Pi AIO setup, I have the sym link created (within hass virtual env):

sudo ln -s /usr/local/lib/python3.5/dist-packages/cec /srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/

(note: that the tutorial points to python3.4 and site packages, while 3.5 only has dist-packages)

I get the following error:

2017-09-14 00:28:27 ERROR (MainThread) [homeassistant.setup] Error during setup of component hdmi_cec
Traceback (most recent call last):
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/cec/__init__.py", line 18, in 
swig_import_helper
return importlib.import_module(mname)
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 986, in _gcd_import
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 956, in _find_and_load_unlocked
ImportError: No module named '_cec'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/homeassistant/setup.py", line 194, in 
_async_setup_component
component.setup, hass, processed_config)
File "/usr/lib/python3.5/asyncio/futures.py", line 380, in __iter__
yield self  # This tells Task to wait for completion.
File "/usr/lib/python3.5/asyncio/tasks.py", line 304, in _wakeup
future.result()
File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
raise self._exception
File "/usr/lib/python3.5/concurrent/futures/thread.py", line 55, in run
result = self.fn(*self.args, **self.kwargs)
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/homeassistant/components/hdmi_cec.py", 
line 184, in setup
adapter = CecAdapter(name=display_name[:12], activate_source=False)
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/pycec/cec.py", line 20, in __init__
import cec
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/cec/__init__.py", line 21, in <module>
_cec = swig_import_helper()
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/cec/__init__.py", line 20, in 
swig_import_helper
return importlib.import_module('_cec')
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
ImportError: No module named '_cec'


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/homeassistant/setup.py", line 194, in 
_async_setup_component
component.setup, hass, processed_config)
File "/usr/lib/python3.5/asyncio/futures.py", line 380, in __iter__
yield self  # This tells Task to wait for completion.
File "/usr/lib/python3.5/asyncio/tasks.py", line 304, in _wakeup
future.result()
File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
raise self._exception
File "/usr/lib/python3.5/concurrent/futures/thread.py", line 55, in run
result = self.fn(*self.args, **self.kwargs)
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/homeassistant/components/hdmi_cec.py", 
line 184, in setup
adapter = CecAdapter(name=display_name[:12], activate_source=False)
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/pycec/cec.py", line 20, in __init__
import cec
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/cec/__init__.py", line 21, in <module>
_cec = swig_import_helper()
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/site-packages/cec/__init__.py", line 20, in 
swig_import_helper
return importlib.import_module('_cec')
File "/srv/homeassistant/homeassistant_venv/lib/python3.5/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
ImportError: No module named '_cec'

`

any help would be greatly appreciated!