Symptom: The emulator built directly from the gingerbread branch doesn’t start and stays stuck on a black screen.
Cause: The gingerbread branch uses version R7 of the emulator, which doesn’t have all the features necessary to run recent versions of gingerbread.
Fix: Use version R12 of the emulator, and a newer kernel that matches those tools. No need to do a clean build.
$ repo forall platform/external/qemu -c git checkout aosp/tools_r12 $ make $ emulator -kernel prebuilt/android-arm/kernel/kernel-qemu-armv7