$ cat chromedriver.log
[1540830001.093][INFO]: [490fd972b915d7cdff353c635ea4042d] COMMAND InitSession {
   "capabilities": {
      "firstMatch": [ {
         "browserName": "chrome",
         "goog:chromeOptions": {
            "args": [ "--headless", "--no-sandbox", "--disable-notifications", "--disable-gpu" ],
            "extensions": [  ]
         }
      } ]
   },
   "desiredCapabilities": {
      "browserName": "chrome",
      "goog:chromeOptions": {
         "args": [ "--headless", "--no-sandbox", "--disable-notifications", "--disable-gpu" ],
         "extensions": [  ]
      }
   }
}
[1540830001.095][INFO]: Populating Preferences file: {
   "alternate_error_pages": {
      "enabled": false
   },
   "autofill": {
      "enabled": false
   },
   "browser": {
      "check_default_browser": false
   },
   "distribution": {
      "import_bookmarks": false,
      "import_history": false,
      "import_search_engine": false,
      "make_chrome_default_for_user": false,
      "skip_first_run_ui": true
   },
   "dns_prefetching": {
      "enabled": false
   },
   "profile": {
      "content_settings": {
         "pattern_pairs": {
            "https://*,*": {
               "media-stream": {
                  "audio": "Default",
                  "video": "Default"
               }
            }
         }
      },
      "default_content_setting_values": {
         "geolocation": 1
      },
      "default_content_settings": {
         "geolocation": 1,
         "mouselock": 1,
         "notifications": 1,
         "popups": 1,
         "ppapi-broker": 1
      },
      "password_manager_enabled": false
   },
   "safebrowsing": {
      "enabled": false
   },
   "search": {
      "suggest_enabled": false
   },
   "translate": {
      "enabled": false
   }
}
[1540830001.095][INFO]: Populating Local State file: {
   "background_mode": {
      "enabled": false
   },
   "ssl": {
      "rev_checking": {
         "enabled": false
      }
   }
}
[1540830001.097][INFO]: Launching chrome: /usr/bin/google-chrome --disable-background-networking --disable-client-side-phishing-detection --disable-default-apps --disable-gpu --disable-hang-monitor --disable-notifications --disable-popup-blocking --disable-prompt-on-repost --disable-sync --disable-web-resources --enable-automation --enable-logging --force-fieldtrials=SiteIsolationExtensions/Control --headless --ignore-certificate-errors --load-extension=/tmp/.org.chromium.Chromium.F1b7Y3/internal --log-level=0 --metrics-recording-only --no-first-run --no-sandbox --password-store=basic --remote-debugging-port=0 --test-type=webdriver --use-mock-keychain --user-data-dir=/tmp/.org.chromium.Chromium.ppTETE data:,
Fontconfig warning: "/etc/fonts/fonts.conf", line 100: unknown element "blank"
[1029/172001.764759:ERROR:gpu_process_transport_factory.cc(980)] Lost UI shared context.

DevTools listening on ws://127.0.0.1:38557/devtools/browser/32e1af95-91e7-4395-bc72-04a344a843f8
[1540830001.838][DEBUG]: DevTools HTTP Request: http://localhost:38557/json/version
[1540830002.150][DEBUG]: DevTools HTTP Response: {
   "Browser": "HeadlessChrome/70.0.3538.77",
   "Protocol-Version": "1.3",
   "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/70.0.3538.77 Safari/537.36",
   "V8-Version": "7.0.276.32",
   "WebKit-Version": "537.36 (@0f6ce0b0cd63a12cb4eccea3637b1bc9a29148d9)",
   "webSocketDebuggerUrl": "ws://localhost:38557/devtools/browser/32e1af95-91e7-4395-bc72-04a344a843f8"
}

[1540830002.174][DEBUG]: DevTools HTTP Request: http://localhost:38557/json
[1540830002.175][DEBUG]: DevTools HTTP Response: [ {
   "description": "",
   "devtoolsFrontendUrl": "/devtools/inspector.html?ws=localhost:38557/devtools/page/0F4AF50585A1F7483A1D05612E432B6E",
   "id": "0F4AF50585A1F7483A1D05612E432B6E",
   "title": "data:,",
   "type": "page",
   "url": "data:,",
   "webSocketDebuggerUrl": "ws://localhost:38557/devtools/page/0F4AF50585A1F7483A1D05612E432B6E"
} ]

[1540830002.176][DEBUG]: DevTools HTTP Request: http://localhost:38557/json
[1540830002.177][DEBUG]: DevTools HTTP Response: [ {
   "description": "",
   "devtoolsFrontendUrl": "/devtools/inspector.html?ws=localhost:38557/devtools/page/0F4AF50585A1F7483A1D05612E432B6E",
   "id": "0F4AF50585A1F7483A1D05612E432B6E",
   "title": "data:,",
   "type": "page",
   "url": "data:,",
   "webSocketDebuggerUrl": "ws://localhost:38557/devtools/page/0F4AF50585A1F7483A1D05612E432B6E"
} ]

[1540830002.180][INFO]: resolved localhost to ["::1","127.0.0.1"]
[1540830004.180][WARNING]: Timed out connecting to Chrome, retrying...
[1540830004.181][INFO]: resolved localhost to ["::1","127.0.0.1"]
[1540830008.180][WARNING]: Timed out connecting to Chrome, retrying...
[1540830008.181][INFO]: resolved localhost to ["::1","127.0.0.1"]
[1540830016.181][WARNING]: Timed out connecting to Chrome, retrying...
[1540830016.181][INFO]: resolved localhost to ["::1","127.0.0.1"]
[1540830032.181][WARNING]: Timed out connecting to Chrome, giving up.
[1540830032.182][DEBUG]: DevTools HTTP Request: http://localhost:38557/json
[1540830032.183][DEBUG]: DevTools HTTP Response: [ {
   "description": "",
   "devtoolsFrontendUrl": "/devtools/inspector.html?ws=localhost:38557/devtools/page/0F4AF50585A1F7483A1D05612E432B6E",
   "id": "0F4AF50585A1F7483A1D05612E432B6E",
   "title": "data:,",
   "type": "page",
   "url": "data:,",
   "webSocketDebuggerUrl": "ws://localhost:38557/devtools/page/0F4AF50585A1F7483A1D05612E432B6E"
} ]

[1540830032.183][DEBUG]: DevTools HTTP Request: http://localhost:38557/json
[1540830032.183][DEBUG]: DevTools HTTP Response: [ {
   "description": "",
   "devtoolsFrontendUrl": "/devtools/inspector.html?ws=localhost:38557/devtools/page/0F4AF50585A1F7483A1D05612E432B6E",
   "id": "0F4AF50585A1F7483A1D05612E432B6E",
   "title": "data:,",
   "type": "page",
   "url": "data:,",
   "webSocketDebuggerUrl": "ws://localhost:38557/devtools/page/0F4AF50585A1F7483A1D05612E432B6E"
} ]

[1540830032.184][INFO]: resolved localhost to ["::1","127.0.0.1"]
[1540830034.184][WARNING]: Timed out connecting to Chrome, retrying...
[1540830034.184][INFO]: resolved localhost to ["::1","127.0.0.1"]
[1540830038.184][WARNING]: Timed out connecting to Chrome, retrying...
[1540830038.185][INFO]: resolved localhost to ["::1","127.0.0.1"]
[1540830046.184][WARNING]: Timed out connecting to Chrome, retrying...
[1540830046.185][INFO]: resolved localhost to ["::1","127.0.0.1"]
[1540830062.185][WARNING]: Timed out connecting to Chrome, giving up.
[1540830062.249][INFO]: [490fd972b915d7cdff353c635ea4042d] RESPONSE InitSession ERROR session not created
from disconnected: unable to connect to renderer
  (Session info: headless chrome=70.0.3538.77)
[1540830062.249][DEBUG]: Log type 'driver' lost 8 entries on destruction
[1540830062.249][DEBUG]: Log type 'browser' lost 0 entries on destruction