我遵循操作说明 一切似乎都正常，但最后手机重新启动并显示一条消息“此手机需要从电脑或服务中心恢复”。
所以我可以闪回到 Android 4.4.4“KitKat”，一切正常。实际上，从启动中我可以启动恢复启动，即 ubuntu 启动，但我无法启动 ubuntu 操作系统...
我尝试了稳定频道和开发频道。
ubuntu-device-flash touch --channel=ubuntu-touch/devel/ubuntu --bootstrap
2016/03/06 11:08:00 Expecting the device to be in the bootloader... waiting
2016/03/06 11:08:00 Device is |mako|
2016/03/06 11:08:00 Flashing version 8 from ubuntu-touch/devel/ubuntu channel and server https://system-image.ubuntu.com to device mako
19.04 MB / 19.04 MB [====================================] 100.00 % 301.97 KB/s
52.43 MB / 52.43 MB [====================================] 100.00 % 408.69 KB/s
288.72 MB / 288.72 MB [==================================] 100.00 % 437.31 KB/s
2016/03/06 11:19:39 Start pushing /home/splater/.cache/ubuntuimages/pool/ubuntu-0144c0d9ab780d8b40477987c3004d4c25d1861e6dd067125e77970c11ec76a1.tar.xz to device
2016/03/06 11:19:39 Start pushing /home/splater/.cache/ubuntuimages/gpg/image-signing.tar.xz to device
2016/03/06 11:19:39 Start pushing /home/splater/.cache/ubuntuimages/pool/custom-9cebce4a630edb99402c79c73a7eb7eed051febe93e66208c6711f29f6d5cf35.tar.xz to device
2016/03/06 11:19:39 Start pushing /home/splater/.cache/ubuntuimages/ubuntu-touch/devel/ubuntu/mako/version-8.tar.xz to device
2016/03/06 11:19:39 Start pushing /home/splater/.cache/ubuntuimages/pool/device-00f7ea9bb6e1b445460b981872b273c4a49cea282a4478831543ccf9d83d7ab2.tar.xz to device
2016/03/06 11:19:39 Start pushing /home/splater/.cache/ubuntuimages/gpg/image-master.tar.xz to device
2016/03/06 11:19:40 Done pushing /home/splater/.cache/ubuntuimages/ubuntu-touch/devel/ubuntu/mako/version-8.tar.xz to device
2016/03/06 11:19:40 Done pushing /home/splater/.cache/ubuntuimages/gpg/image-master.tar.xz to device
2016/03/06 11:19:40 Done pushing /home/splater/.cache/ubuntuimages/gpg/image-signing.tar.xz to device
2016/03/06 11:21:10 Done pushing /home/splater/.cache/ubuntuimages/pool/custom-9cebce4a630edb99402c79c73a7eb7eed051febe93e66208c6711f29f6d5cf35.tar.xz to device
2016/03/06 11:22:56 Done pushing /home/splater/.cache/ubuntuimages/pool/device-00f7ea9bb6e1b445460b981872b273c4a49cea282a4478831543ccf9d83d7ab2.tar.xz to device
2016/03/06 11:29:08 Done pushing /home/splater/.cache/ubuntuimages/pool/ubuntu-0144c0d9ab780d8b40477987c3004d4c25d1861e6dd067125e77970c11ec76a1.tar.xz to device
2016/03/06 11:29:08 Created ubuntu_command: /home/splater/.cache/ubuntuimages/ubuntu_commands129934107
2016/03/06 11:29:08 Rebooting into recovery to flash
在引导时我可以看到：
Bootloader version MAKOZ30d
SECURE BOOT - enabled
LOCK STATE - unlocked
安全启动是个问题吗？
答案1
尝试 mako 的 rc 频道或 bq aquaris 频道（我使用的是 nexus 4 上建议使用的 bq aquaris RC）。首先从 android 5.1.1 图像中刷新最新的无线电。当我第一次安装时，我无法稳定启动。
答案2
是的，你自己回答了：安全启动是问题所在。即使 developer.ubuntu.com 上的说明非常完整，但我发现这些视频教程更有用。