{"action":"created","issue":{"url":"https://api.github.com/repos/TeamWin/Team-Win-Recovery-Project/issues/457","labels_url":"https://api.github.com/repos/TeamWin/Team-Win-Recovery-Project/issues/457/labels{/name}","comments_url":"https://api.github.com/repos/TeamWin/Team-Win-Recovery-Project/issues/457/comments","events_url":"https://api.github.com/repos/TeamWin/Team-Win-Recovery-Project/issues/457/events","html_url":"https://github.com/TeamWin/Team-Win-Recovery-Project/issues/457","id":93767895,"number":457,"title":"TWRP recovery shows black screen in klimtwifi","user":{"login":"noobody01","id":13234907,"avatar_url":"https://avatars.githubusercontent.com/u/13234907?v=3","gravatar_id":"","url":"https://api.github.com/users/noobody01","html_url":"https://github.com/noobody01","followers_url":"https://api.github.com/users/noobody01/followers","following_url":"https://api.github.com/users/noobody01/following{/other_user}","gists_url":"https://api.github.com/users/noobody01/gists{/gist_id}","starred_url":"https://api.github.com/users/noobody01/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/noobody01/subscriptions","organizations_url":"https://api.github.com/users/noobody01/orgs","repos_url":"https://api.github.com/users/noobody01/repos","events_url":"https://api.github.com/users/noobody01/events{/privacy}","received_events_url":"https://api.github.com/users/noobody01/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":6,"created_at":"2015-07-08T11:35:26Z","updated_at":"2015-07-09T17:46:24Z","closed_at":null,"body":"TWRP recovery images built for the Samsung Galaxy Tab 8.4 SM-T700 (klimtwifi) boot to a black screen. The tablet is recognized when connected to a PC, suggesting that TWRP is running, but either the display is not functional or its brightness is set to a very low level. The default Cyanogenmod recovery images produced using a nearly identical build environment do not show this problem (changes in setup noted below).\r\n\r\nI compiled TWRP under a Cyanogenmod 12.1 base using the shell commands shown below. The Cyanogenmod base was downloaded using the build-manifest.xml I pulled from my Galaxy Tab SM-T700. (Some intermediate commands maybe missing as I'm typing this partly from memory. Git sources are current as of 2015-07-06.)\r\n\r\n```\r\n$ croot\r\n$ cd bootable\r\n$ rm recovery -fR\r\n$ git clone https://github.com/omnirom/android_bootable_recovery\r\n$ mv android_bootable_recovery recovery\r\n$ croot\r\n```\r\n\r\nI then edit device/samsung/klimtwifi/BoardConfig.mk, adding only the line:\r\n\r\n> DEVICE_RESOLUTION := 1080x1920\r\n\r\nTo ensure shell environment is clean, I log out and start a new shell session. \r\n\r\n```\r\n$ cd ~/CM12/system\r\n$ source build/envsetup.sh\r\n$ breakfast klimtwifi\r\n```\r\n(There were no errors after this step)\r\n\r\n```\r\n$ mka clean\r\n$ time mka recoveryimage\r\n```\r\n\r\nThe build finishes and successfully outputs both boot.img and recovery.img. I flash recovery.img using the following commands. This is the same set of commands I use to successfully flash and reboot into the default Cyanogenmod recovery.\r\n\r\n```\r\n$ adb root\r\n$ adb push recovery.img /storage/sdcard1/recovery.img\r\n$ adb shell 'busybox dd if=/storage/sdcard1/recovery.img of=/dev/block/mmcblk0p10 ; sleep 10 ; sync ; sleep 10 ; echo Hopefully done!'\r\n$ adb reboot\r\n```\r\n\r\nThe tablet reboots but after the Samsung logo all I see is a black screen. The tablet appears to be recognized as shown by the relevant entries in \"lsusb\" and \"dmesg\"."},"comment":{"url":"https://api.github.com/repos/TeamWin/Team-Win-Recovery-Project/issues/comments/120084293","html_url":"https://github.com/TeamWin/Team-Win-Recovery-Project/issues/457#issuecomment-120084293","issue_url":"https://api.github.com/repos/TeamWin/Team-Win-Recovery-Project/issues/457","id":120084293,"user":{"login":"SdtBarbarossa","id":11553207,"avatar_url":"https://avatars.githubusercontent.com/u/11553207?v=3","gravatar_id":"","url":"https://api.github.com/users/SdtBarbarossa","html_url":"https://github.com/SdtBarbarossa","followers_url":"https://api.github.com/users/SdtBarbarossa/followers","following_url":"https://api.github.com/users/SdtBarbarossa/following{/other_user}","gists_url":"https://api.github.com/users/SdtBarbarossa/gists{/gist_id}","starred_url":"https://api.github.com/users/SdtBarbarossa/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/SdtBarbarossa/subscriptions","organizations_url":"https://api.github.com/users/SdtBarbarossa/orgs","repos_url":"https://api.github.com/users/SdtBarbarossa/repos","events_url":"https://api.github.com/users/SdtBarbarossa/events{/privacy}","received_events_url":"https://api.github.com/users/SdtBarbarossa/received_events","type":"User","site_admin":false},"created_at":"2015-07-09T17:46:24Z","updated_at":"2015-07-09T17:46:24Z","body":"remove this line in boardconfig may help:\r\nBOARD_USE_CUSTOM_RECOVERY_FONT := \\\"roboto_23x41.h\\\""}}