Set brightness on login screen failed

[mosdeo]

Ubuntu 16.04, X1Y2 OLED

/tmp/thinkpad-x1-yoga$ sudo env ANSIBLE_NOCOWS=1 ansible-playbook x1yoga.yml --skip-tags packages
[WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'

PLAY [localhost] *********************************************************************************************************************************************************************

TASK [Gathering Facts] ***************************************************************************************************************************************************************
ok: [localhost]

TASK [display : include_tasks] *******************************************************************************************************************************************************
included: /tmp/thinkpad-x1-yoga/roles/display/tasks/lightdm.yml for localhost
included: /tmp/thinkpad-x1-yoga/roles/display/tasks/oled-brightness.yml for localhost

TASK [display : Set login screen to HiDPI mode] **************************************************************************************************************************************
skipping: [localhost] => (item={u'key': u'xft-dpi', u'value': u'192'})

TASK [display : Set brightness on login screen] **************************************************************************************************************************************
fatal: [localhost]: FAILED! => {"changed": false, "checksum": "d8bb9152b6c0b0c4ad6a463348eafffb0861aade", "msg": "Destination directory /opt/etc does not exist"}
to retry, use: --limit @/tmp/thinkpad-x1-yoga/x1yoga.retry

PLAY RECAP ***************************************************************************************************************************************************************************
localhost : ok=3 changed=0 unreachable=0 failed=1

[Nicceboy]

Ubuntu 18.04 XiY2 OLED, same problem here.

TASK [display : Set brightness on login screen] ********************************
fatal: [localhost]: FAILED! => {"changed": false, "checksum": "d8bb9152b6c0b0c4ad6a463348eafffb0861aade", "msg": "Destination directory /opt/etc does not exist"}
	to retry, use: --limit @/tmp/thinkpad-x1-yoga/x1yoga.retry

[Redsandro]

I don't have this laptop at the moment so I cannot test, but I think the directory needed to be created, so I created a possible fix on the development (!) branch: 5943494

Note that this was made for lightdm. I am not sure the new releases (Ubuntu 18, Linux Mint 19) can still use this.

Feel free to submit a tested+working PR, if this one doesn't fix the issue.

[Nicceboy]

Looks like that was the problem. It's depending on folders what already exists, and Ubuntu is missing some. Startup is handled by lightdm as well. If I have some time, i could make working version for Gnome.