build cm12.1 for nexus 7 successfully, but emulator black screen.

[peng fei]

I download cm12.1 and compile Nexus7 2012(grouper) successfully  on my computer.

start emulator but black screen

Then, I download new kernel from https://github.com/cyanogenmod/android_kernel_asus_grouper/tree/cm-12.1.

$ cd new kernel dir.

$ make ARCH=arm cyanogenmod_grouper_defconfig

modify Makefile

# ARCH ?= $(SUBARCH)
ARCH ?= arm
# CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
CROSS_COMPILE ?= arm-eabi-

# LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
# $(call cc-ldoption, -Wl$(comma)--build-id,))
LDFLAGS_BUILD_ID =

$ make

return to the cm12.1 for Nexus7 dir.

[pengfei@pengfei ~]$ cd android/system/

[pengfei@pengfei system]$ source build/envsetup.sh

including device/asus/grouper/vendorsetup.sh

including device/generic/mini-emulator-arm64/vendorsetup.sh

including device/generic/mini-emulator-x86_64/vendorsetup.sh

including device/generic/mini-emulator-armv7-a-neon/vendorsetup.sh

including device/generic/mini-emulator-mips/vendorsetup.sh

including device/generic/mini-emulator-x86/vendorsetup.sh

including vendor/cm/vendorsetup.sh

including sdk/bash_completion/adb.bash

including vendor/cm/bash_completion/git.bash

including vendor/cm/bash_completion/repo.bash

[pengfei@pengfei system]$ breakfast grouper

including vendor/cm/vendorsetup.sh

Looking for dependencies

============================================

PLATFORM_VERSION_CODENAME=REL

PLATFORM_VERSION=5.1.1

CM_VERSION=12.1-20161020-UNOFFICIAL-grouper

TARGET_PRODUCT=cm_grouper

TARGET_BUILD_VARIANT=userdebug

TARGET_BUILD_TYPE=release

TARGET_BUILD_APPS=

TARGET_ARCH=arm

TARGET_ARCH_VARIANT=armv7-a-neon

TARGET_CPU_VARIANT=cortex-a9

TARGET_2ND_ARCH=

TARGET_2ND_ARCH_VARIANT=

TARGET_2ND_CPU_VARIANT=

HOST_ARCH=x86_64

HOST_OS=linux

HOST_OS_EXTRA=Linux-3.17.4-x86_64-with-fedora-21-Twenty_One

HOST_BUILD_TYPE=release

BUILD_ID=LMY49J

OUT_DIR=/home/pengfei/android/system/out

============================================

[pengfei@pengfei system]$ emulator -kernel /home/pengfei/android/kernel_asus_grouper-cm-12.1/arch/arm/boot/zImage  -system /home/pengfei/android/system/out/target/product/grouper/system.img -data /home/pengfei/android/system/out/target/product/grouper/userdata-qemu.img -ramdisk /home/pengfei/android/system/out/target/product/grouper/ramdisk.img -debug-init -logcat '*:v'

emulator: found Android build root: /home/pengfei/android/system

emulator: found Android build out:  /home/pengfei/android/system/out/target/product/grouper

emulator: Read property file at /home/pengfei/android/system/out/target/product/grouper/system/build.prop

emulator: Cannot find boot properties file: /home/pengfei/android/system/out/target/product/grouper/boot.prop

emulator: Found target API sdkVersion: 22

emulator: virtual device has no config file - no problem

emulator: using core hw config path: /home/pengfei/android/system/out/target/product/grouper/hardware-qemu.ini

emulator: found skin-specific hardware.ini: /home/pengfei/android/system/development/tools/emulator/skins/HVGA/hardware.ini

emulator: autoconfig: -skin HVGA

emulator: autoconfig: -skindir /home/pengfei/android/system/development/tools/emulator/skins

emulator: found skin-specific hardware.ini: /home/pengfei/android/system/development/tools/emulator/skins/HVGA/hardware.ini

emulator: keyset loaded from: /home/pengfei/.android/default.keyset

emulator: trying to load skin file '/home/pengfei/android/system/development/tools/emulator/skins/HVGA/layout'

emulator: skin network speed: 'full'

emulator: skin network delay: 'none'

emulator: Auto-detect: Kernel image requires legacy device naming scheme.

emulator: Auto-detect: Kernel does not support YAFFS2 partitions.

emulator: autoconfig: -sysdir /home/pengfei/android/system/out/target/product/grouper

emulator: Using initial system image: /home/pengfei/android/system/out/target/product/grouper/system.img

emulator: WARNING: system partition size adjusted to match image file (369 MB > 200 MB)

emulator: autoconfig: -initdata /home/pengfei/android/system/out/target/product/grouper/userdata.img

emulator: Physical RAM size: 512MB

emulator: WARNING: CPU acceleration only works with x86/x86_64 system images.

emulator: Auto-config: -qemu -cpu cortex-a8

Content of hardware configuration file:

  hw.cpu.arch = arm

  hw.cpu.model = cortex-a8

  hw.ramSize = 512

  hw.screen = touch

  hw.mainKeys = yes

  hw.trackBall = yes

  hw.keyboard = no

  hw.keyboard.lid = no

  hw.keyboard.charmap = qwerty2

  hw.dPad = yes

  hw.gsmModem = yes

  hw.gps = yes

  hw.battery = yes

  hw.accelerometer = yes

  hw.audioInput = yes

  hw.audioOutput = yes

  hw.sdCard = yes

  disk.cachePartition = yes

  disk.cachePartition.size = 66m

  hw.lcd.width = 320

  hw.lcd.height = 480

  hw.lcd.depth = 16

  hw.lcd.density = 160

  hw.lcd.backlight = yes

  hw.gpu.enabled = no

  hw.initialOrientation = portrait

  hw.camera.back = emulated

  hw.camera.front = none

  vm.heapSize = 48

  hw.sensors.proximity = yes

  hw.sensors.magnetic_field = yes

  hw.sensors.orientation = yes

  hw.sensors.temperature = yes

  hw.useext4 = yes

  kernel.path = /home/pengfei/android/kernel_asus_grouper-cm-12.1/arch/arm/boot/zImage

  kernel.parameters =  androidboot.console=ttyS2 android.checkjni=1 androidboot.logcat=*:v

  kernel.newDeviceNaming = no

  kernel.supportsYaffs2 = no

  disk.ramdisk.path = /home/pengfei/android/system/out/target/product/grouper/ramdisk.img

  disk.systemPartition.initPath = /home/pengfei/android/system/out/target/product/grouper/system.img

  disk.systemPartition.size = 369m

  disk.dataPartition.path = /home/pengfei/android/system/out/target/product/grouper/userdata-qemu.img

  disk.dataPartition.size = 200m

  avd.name = <build>

.

QEMU options list:

emulator: argv[00] = "/home/pengfei/android/system/prebuilts/android-emulator/linux-x86_64/emulator64-arm"

emulator: argv[01] = "-serial"

emulator: argv[02] = "stdio"

emulator: argv[03] = "-android-hw"

emulator: argv[04] = "/home/pengfei/android/system/out/target/product/grouper/hardware-qemu.ini"

Concatenated QEMU options:

 /home/pengfei/android/system/prebuilts/android-emulator/linux-x86_64/emulator64-arm -serial stdio -android-hw /home/pengfei/android/system/out/target/product/grouper/hardware-qemu.ini

emulator: registered 'boot-properties' qemud service

emulator: Using kernel serial device prefix: ttyS

emulator: No fstab.goldfish file in ramdisk image

emulator: Probing system image file for partition type: /home/pengfei/android/system/out/target/product/grouper/system.img

emulator: system partition format: yaffs2

emulator: Mapping 'system' partition image to /tmp/android-pengfei/emulator-rOi6Q7

emulator: nand_add_dev: system,size=0x17100000,file=/tmp/android-pengfei/emulator-rOi6Q7,initfile=/home/pengfei/android/system/out/target/product/grouper/system.img

emulator: rounding devsize up to a full eraseunit, now 1710f000

emulator: Probing userdata image file for partition type: /home/pengfei/android/system/out/target/product/grouper/userdata-qemu.img

emulator: userdata partition format: yaffs2

emulator: nand_add_dev: userdata,size=0xc800000,file=/home/pengfei/android/system/out/target/product/grouper/userdata-qemu.img

emulator: rounding devsize up to a full eraseunit, now c810000

emulator: cache partition format: ext4

emulator: Mapping 'cache' partition image to /tmp/android-pengfei/emulator-HIG0IX

emulator: Creating empty cache partition image at: /tmp/android-pengfei/emulator-HIG0IX

Creating filesystem with parameters:

    Size: 69206016

    Block size: 4096

    Blocks per group: 32768

    Inodes per group: 4224

    Inode size: 256

    Journal blocks: 1024

    Label: 

    Blocks: 16896

    Block groups: 1

    Reserved block group size: 7

Created filesystem with 11/4224 inodes and 1302/16896 blocks

emulator: nand_add_dev: cache,size=0x4200000,file=/tmp/android-pengfei/emulator-HIG0IX,pagesize=512,extrasize=0

emulator: registered 'boot-properties' qemud service

emulator: Adding boot property: 'dalvik.vm.heapsize' = '48m'

emulator: Adding boot property: 'ro.config.low_ram' = 'true'

emulator: Adding boot property: 'qemu.sf.lcd_density' = '160'

emulator: Adding boot property: 'qemu.hw.mainkeys' = '1'

emulator: Adding boot property: 'qemu.sf.fake_camera' = 'back'

emulator: Initializing hardware OpenGLES emulation support

emulator: Kernel parameters: qemu.gles=0 qemu=1 console=ttyS0 android.qemud=ttyS1 androidboot.console=ttyS2 android.checkjni=1 androidboot.logcat=*:v ndns=1

emulator: autoconfig: -scale 1

emulator: Forcing ro.adb.qemud to "0".

emulator: control console listening on port 5554, ADB on port 5555

emulator: can't connect to ADB server: Transport endpoint is not connected

emulator: ping program: /home/pengfei/android/system/prebuilts/android-emulator/linux-x86_64/ddms

[Ye Roger]

What you did it does not make sense. Why you want to run a non-emulator image on emulator? You should run that image on Nexus 7 (grouper) hardware. Do you know what you are doing?