Well,
I bit the bullet and I bought a nexus 9 and i actually have a nexus 6 coming soon too. Im not sure how long I will keep these devices but I guess as I mess around Ill post some stuff here.
First thing for me, was to disable the encryption to speed up this tablet almost 200X fold.
I was looking at people posting repacked kernels and I am not really the type that says OK, and flashes and goes on. i want to know how/why and how I can do it myself.
Well, the answer is quite simple. This flag is inside the nexus9 boot.img (and the file inside the ramdisk)
the file name is = fstab.flounder (somehow some people are able to repack these images)
I picked to do it from source code.
So you would sync up to the latest for 5.0.1
your dir may vary but mine is =
/Volumes/Android/aosp/device/htc/flounder
This is the device folder and it contains the file we need to edit.
So simply by changing the force to encrypt able fixes the issue.
now you go to your crooot (main android build system)
and you type in
. build/envsetup.sh
lunch aosp_flounder-userdebug
make -j 8 bootimage
after awhile you shall get a bootimage. and you can flash it to your nexus9 and you don't need to wait for people to post re-packs. you can just sync up + do as described and poof.
Now one other thing I noticed, The nexus9 kernel is prebuilt and so is the DTB. so you can only modify the ramdisk from AOSP level. I am assuming the real kernel is someplace else. I really have not looked for it since I don't really do kernel work. But, I found this odd, normally you build the kernel and all. Not in this case!
Hope this helps some. It helped me
I bit the bullet and I bought a nexus 9 and i actually have a nexus 6 coming soon too. Im not sure how long I will keep these devices but I guess as I mess around Ill post some stuff here.
First thing for me, was to disable the encryption to speed up this tablet almost 200X fold.
I was looking at people posting repacked kernels and I am not really the type that says OK, and flashes and goes on. i want to know how/why and how I can do it myself.
Well, the answer is quite simple. This flag is inside the nexus9 boot.img (and the file inside the ramdisk)
the file name is = fstab.flounder (somehow some people are able to repack these images)
I picked to do it from source code.
So you would sync up to the latest for 5.0.1
your dir may vary but mine is =
/Volumes/Android/aosp/device/htc/flounder
This is the device folder and it contains the file we need to edit.
Code:
# Android fstab file.
#<src> <mnt_point> <type> <mnt_flags and options> <fs_mgr_flags>
# The filesystem that contains the filesystem checker binary (typically /system) cannot
# specify MF_CHECK, and must come before any filesystems that do specify MF_CHECK
/dev/block/platform/sdhci-tegra.3/by-name/APP /system ext4 ro wait
/dev/block/platform/sdhci-tegra.3/by-name/VNR /vendor ext4 ro wait
/dev/block/platform/sdhci-tegra.3/by-name/CAC /cache ext4 noatime,nosuid,nodev,nomblk_io_submit,errors=panic wait,check
/dev/block/platform/sdhci-tegra.3/by-name/UDA /data f2fs noatime,nosuid,nodev,errors=recover wait,check,encryptable=/dev/block/platform/sdhci-tegra.3/by-name/MD1
/dev/block/platform/sdhci-tegra.3/by-name/UDA /data ext4 noatime,nosuid,nodev,nomblk_io_submit,errors=panic wait,check,encryptable=/dev/block/platform/sdhci-tegra.3/by-name/MD1
/dev/block/platform/sdhci-tegra.3/by-name/LNX /boot emmc defaults defaults
/dev/block/platform/sdhci-tegra.3/by-name/SOS /recovery emmc defaults defaults
/dev/block/platform/sdhci-tegra.3/by-name/MSC /misc emmc defaults defaults
/dev/block/platform/sdhci-tegra.3/by-name/EBT /bootloader emmc defaults defaults
/dev/block/platform/sdhci-tegra.3/by-name/PST /persistent emmc defaults defaults
/dev/block/zram0So simply by changing the force to encrypt able fixes the issue.
now you go to your crooot (main android build system)
and you type in
. build/envsetup.sh
lunch aosp_flounder-userdebug
make -j 8 bootimage
after awhile you shall get a bootimage. and you can flash it to your nexus9 and you don't need to wait for people to post re-packs. you can just sync up + do as described and poof.
Now one other thing I noticed, The nexus9 kernel is prebuilt and so is the DTB. so you can only modify the ramdisk from AOSP level. I am assuming the real kernel is someplace else. I really have not looked for it since I don't really do kernel work. But, I found this odd, normally you build the kernel and all. Not in this case!
Hope this helps some. It helped me
