* RK2818 issues
some apps get FC
no camera preview
no UI to change USB mode
no USB mass storage mode (mount from PC) under some condition
* RK2818 FAQ
- how to make update.img
- lags on initial boot
please wait several seconds after calibration screen popped
- install failed on some apps (e.g. Angry Birds)
remove SD card before install
- I want to change USB mode host<->device
echo 1 > /sys/bus/platform/drivers/dwc_otg/force_usb_mode
echo 0 > /sys/bus/platform/drivers/dwc_otg/force_usb_mode
or, try this app: http://forum.xda-developers.com/show...&postcount=543
- lags on 3D apps
yes, there is no 3D hardware on RK2818
* RK2918 FAQ
- boot.img in SDK2.0 based ROM
in (some of) SDK2.0 based ROMs, new format is used for boot.img(and recovery.img). it's almost same as standard android boot.img format. it has both kernel and ramdisk.
in general, unpackbootimg/mkbootimg can be used to unpack/repack for this format. but it doesn't work with boot.img for RK2918 tablets. Rockchip uses non-standard way to generate hash value which is stored in header of boot.img. if you flashed repacked boot.img, your tablet will go into recovery mode. it means we can't make customized boot.img(ramdisk).
but there is workaround. we can convert SDK2.0 boot.img into pre-SDK2.0 format.
$ unpackbootimg -i boot.img
$ rkcrc -k boot.img-zImage kernel.img
$ rkcrc -k boot.img-ramdisk.gz ramdisk.img
then flash kernel.img into kernel partition, and ramdisk.img into boot partition.
- accelerometer tweaks
for Yuandao N50DT
* common FAQ
- no gapps
download gapps for CM7
and add files in zip into system.img
- how to use internal NAND flash as SD card?
Settings -> CyanogenMod settings -> Application -> Use internal storage -> On -> reboot
if enabled, internal NAND flash is mounted on /mnt/sdcard and SD card is mounted on /mnt/nand.
- I like portrait / my favorite portrait apps are upside down / accelerometer axes are wrong on some apps
make /data/local.prop with following 3 lines, then reboot.
- I want to do calibration again
delete following files if exist, reboot, run calibration app, then reboot again