First I thank you all for reply. I tried to recompile the kernel but I found out that this config has already been enabled. Then I found that this problem is caused by the kernel is lack of AXP288 PMIC driver, not the kernel itself.(ref: https://bugzilla.kernel.org/show_bug.cgi?id=88471 ) Thank you again for patience.
** Bug watch added: Linux Kernel Bug Tracker #88471 http://bugzilla.kernel.org/show_bug.cgi?id=88471 ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1589383 Title: Kernel With no I2C Controller Battery Support To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1589383/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
