No, I don't have /system/etc/init.goldfish.rc
No, I don't have /system/lib/hw/liblights.goldfish.so either.
How can I build and run with a "goldfish" kernel in the emulator?
I did build in "eng" as follows;
#printconfig
============================================
TARGET_PRODUCT=generic
TARGET_BUILD_VARIANT=eng
TARGET_SIMULATOR=
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm
HOST_ARCH=x86
HOST_OS=linux
HOST_BUILD_TYPE=release
BUILD_ID=
============================================
should I change to any other config?
Ming-
On Jun 11, 9:07 pm, David Turner <di...@android.com> wrote:
> backlight emulation works as follows in 1.5 (this may change in future
> system images though):
>
> 1/ hardware/qemu/liblights/lights.c is compiled into /system/lib/hw/
> liblights.goldfish.so
> 2/ libhardware recognize at runtime that it is running in the emulator
> ("goldfish") system, then loads it
> 3/ the code in lights.c will be used by the system due to this, and will
> send messages to the emulator through the qemud channel to the "hw-control"
> service.
> 4/ the emulator receives it and emulates a change of backlight
>
> If you don't know what QEMUD and QEMUD services are, see:
>
> http://android.git.kernel.org/?p=platform/external/qemu.git;a=blob;f=...http://android.git.kernel.org/?p=platform/external/qemu.git;a=blob;f=...
>
> you can debug that things are working as intended with:
>
> emulator -debug-hw-control => dumps all messages sent to the "hw-control"
> QEMUD service received by the emulator.
> emulator -debug-qemud => dumps all traffic on the QEMUD serial port
> multiplexing channel.
>
> I can imagine several reasons why this is not working for you:
>
> - the system image doesn't have emulator-specific binaries in it (this is
> the case for "user" builds, you will need "userdebug" or "eng" instead)
> - you don't have /system/etc/init.goldfish.rc and/or /system/etc/
> init.goldfish.sh and the emulation support is not started properly
> - you don't have /system/lib/hw/liblights.goldfish.so for some reason
> - you're not running under a "goldfish" kernel in the emulator, so
> liblights.goldfish.so is never loaded/used.
>
> Hope this helps
>
> On Wed, Jun 10, 2009 at 11:42 AM, ming <mingderw...@gmail.com> wrote:
>
> > Dear All,
> > Before we make any real platform system images, we try to build
> > a generic version of emulator from source. But the emulator don't
> > support backlight (we can't turn off or adjust the backlight for the
> > emualtor) as the emulator in SDK 1.5 does. Why?
> > Any clue?
> > Ming-
>
>
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