{"action":"closed","issue":{"url":"https://api.github.com/repos/MattDevo/coreboot/issues/4","labels_url":"https://api.github.com/repos/MattDevo/coreboot/issues/4/labels{/name}","comments_url":"https://api.github.com/repos/MattDevo/coreboot/issues/4/comments","events_url":"https://api.github.com/repos/MattDevo/coreboot/issues/4/events","html_url":"https://github.com/MattDevo/coreboot/issues/4","id":98581525,"number":4,"title":"Graphics Broken on Acer C720 with Core i3","user":{"login":"coolstar","id":1431548,"avatar_url":"https://avatars.githubusercontent.com/u/1431548?v=3","gravatar_id":"","url":"https://api.github.com/users/coolstar","html_url":"https://github.com/coolstar","followers_url":"https://api.github.com/users/coolstar/followers","following_url":"https://api.github.com/users/coolstar/following{/other_user}","gists_url":"https://api.github.com/users/coolstar/gists{/gist_id}","starred_url":"https://api.github.com/users/coolstar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/coolstar/subscriptions","organizations_url":"https://api.github.com/users/coolstar/orgs","repos_url":"https://api.github.com/users/coolstar/repos","events_url":"https://api.github.com/users/coolstar/events{/privacy}","received_events_url":"https://api.github.com/users/coolstar/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2015-08-02T03:34:53Z","updated_at":"2015-10-11T21:24:44Z","closed_at":"2015-10-11T21:24:44Z","body":"Graphics appear to be broken on the Core i3 model of the Acer C720 even with the correct PCI id and Video BIOS. This happens on both the BIOS I've built (https://dl.dropboxusercontent.com/u/59964215/chromebook/ROM/coreboot-seabios-peppy-20150801-coolstar-i3.rom) and the BIOS you've linked on your dropbox.\r\n\r\nWhen John Lewis's coreboot is flashed, there's no issues with graphics initialization.\r\n\r\nWe were able to boot a custom xubuntu recovery iso I built to ssh in and got output from the following commands:\r\n\r\ndmesg (this BIOS): http://paste.ubuntu.com/11983935/\r\n\r\nintel_reg_dumper\r\nBroken (this BIOS): http://paste.ubuntu.com/11983985/\r\nWorking (John Lewis's BIOS): http://paste.ubuntu.com/11984031/\r\n\r\nintel_bios_dumper\r\nBroken (this BIOS): https://dl.dropboxusercontent.com/u/59964215/chromebook/debug-corei3/dmp.bin\r\nWorking (John Lewis's BIOS): https://dl.dropboxusercontent.com/u/59964215/chromebook/debug-corei3/dmp-working.bin\r\n\r\nI compared the VBIOS in my BIOS with the one in John Lewis's (extracted using cbfstool) and their SHA1 checksums match, indicating the issue is not in the VBIOS but in coreboot."}}