{"action":"created","issue":{"url":"https://api.github.com/repos/plasma-mobile/mobster/issues/94","labels_url":"https://api.github.com/repos/plasma-mobile/mobster/issues/94/labels{/name}","comments_url":"https://api.github.com/repos/plasma-mobile/mobster/issues/94/comments","events_url":"https://api.github.com/repos/plasma-mobile/mobster/issues/94/events","html_url":"https://github.com/plasma-mobile/mobster/issues/94","id":89791820,"number":94,"title":"[LTS]: reduce power consumption","user":{"login":"star-buck","id":840070,"avatar_url":"https://avatars.githubusercontent.com/u/840070?v=3","gravatar_id":"","url":"https://api.github.com/users/star-buck","html_url":"https://github.com/star-buck","followers_url":"https://api.github.com/users/star-buck/followers","following_url":"https://api.github.com/users/star-buck/following{/other_user}","gists_url":"https://api.github.com/users/star-buck/gists{/gist_id}","starred_url":"https://api.github.com/users/star-buck/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/star-buck/subscriptions","organizations_url":"https://api.github.com/users/star-buck/orgs","repos_url":"https://api.github.com/users/star-buck/repos","events_url":"https://api.github.com/users/star-buck/events{/privacy}","received_events_url":"https://api.github.com/users/star-buck/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-06-20T17:05:07Z","updated_at":"2015-06-20T18:09:04Z","closed_at":null,"body":""},"comment":{"url":"https://api.github.com/repos/plasma-mobile/mobster/issues/comments/113797819","html_url":"https://github.com/plasma-mobile/mobster/issues/94#issuecomment-113797819","issue_url":"https://api.github.com/repos/plasma-mobile/mobster/issues/94","id":113797819,"user":{"login":"sebasje","id":2237109,"avatar_url":"https://avatars.githubusercontent.com/u/2237109?v=3","gravatar_id":"","url":"https://api.github.com/users/sebasje","html_url":"https://github.com/sebasje","followers_url":"https://api.github.com/users/sebasje/followers","following_url":"https://api.github.com/users/sebasje/following{/other_user}","gists_url":"https://api.github.com/users/sebasje/gists{/gist_id}","starred_url":"https://api.github.com/users/sebasje/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sebasje/subscriptions","organizations_url":"https://api.github.com/users/sebasje/orgs","repos_url":"https://api.github.com/users/sebasje/repos","events_url":"https://api.github.com/users/sebasje/events{/privacy}","received_events_url":"https://api.github.com/users/sebasje/received_events","type":"User","site_admin":false},"created_at":"2015-06-20T18:09:04Z","updated_at":"2015-06-20T18:09:04Z","body":"Apparently, the third of the four cores is using the performance governor, which means it'll always run at full speed and not slow down, even when idle. This means it eats power even when not needed.\r\n\r\nroot@ubuntu-phablet:/sys/devices/system/cpu/cpu2/cpufreq# echo ondemand > scaling_governor\r\nroot@ubuntu-phablet:/sys/devices/system/cpu/cpu2/cpufreq# cat scaling_governor \r\nondemand\r\n\r\nThis should be done somewhen during bootup.\r\n\r\nWeirdly (hardware-weird!), the fourth core doesn't have cpufreq scaling, so we can't read or set it for the fourth core. Making the 3rd core ondemand should already make a difference to power consumption."}}