[KERNEL][AOSP]Tiamat Xoom 2.2.0 "Odachi" [Update: 2011/11/13]


Retired Recognized Developer
May 23, 2010

AOSP Kernels for the Motorola Xoom
Also available for HTC's Droid Incredible, Evo 4G, Nexus One, and Desire (GSM)

Tiamat is a kernel designed for use on the Motorola Xoom. We are very exicted about the future of Honeycomb and Tegra development.
In compliance with the GPL, every change and all attributions can be found in full detail in my git repositories. Please feel free to explore, fork, or even cherry-pick (please include an attribution to the appropriate dev).

Tiamat-AOSP Code Homepage -- Source for all Tiamat Kernels

Version Guide

Tiamat versions are listed in the format X.Y.Z

A progression in X indicates a major change or upgrade from previous versions.
A progression in Y indicates a stable release with some medium alteration or many small ones together.
A progression in Z indicates a minor change and is usually a testing release. Not all of these are released.​
Change Log:

[center][quote][b][size="4"]Version 2.x.x - Second generation Tiamat kernels for 3.2[/size][/b][/quote][/center]
[b]Version 2.2.0[/b]
[*] Fixed 4G modem support (huge thanks to kcrudup)
[*] Brought in many nvidia upstream changes
[*] Switched to BFQ as the default I/O schedular
[*] Includes the lagfree cpu frequency governor

[b]Version 2.1.0[/b]
[*] Brought back the autogroup cpu scheduler. (Thanks to kcrudup)
[*] Many Low-level nvidia bugfixes.
[*] Brought in the SIO I/O Scheduler
[*] Fixed the wifi sleep issue (TDR)
[*] Fixed the 1.7ghz voltage issues (TDR)
[*] Removed the usb mass storage support. (being able to write directly to the external sdcard via your pc)
[*] GPU automatic frequency scaling

[b]Version 2.0.0[/b]
[*] Apple Magic Mouse Support
[*] 1.7Ghz frequency tweaking
[*] Cpu Frequency scaling patch - should be nicer now.
[*] Disabled the autogroup scheduler
[*] Voltage Controls - Thanks TDR!
[*] Miscellaneous upstream changes

[center][quote][b][size="4"]Version 1.x.x[/size][/b][/quote][/center]

[b]Version 1.4.4[/b]
[*]Introducing 1.7Ghz Overclock!
[*]All frequency steps built in.  1.2, 1.408, 1.504, 1.6, and 1.7!
[*]Two versions.  Overclocked GPU and Stock GPU [request filled]
[*]USB Tether work for real now!  I personally tested with my Evo running Konikub's Evo Elite III Sense Froyo Rom.  See below for script.
[*]Added Realtek 8150 USB Ethernet Dongle Module [request filled]
[*]Usb Mass Storage now stock in build.  Visit [URL="http://forum.xda-developers.com/showthread.php?t=1068999"]Mass Storage Tool Thread by dinomight[/URL] for implementation. (thanks Kcrudup for turning on lun0 for us ;D )
[*]Please see important release notes for this build.

[b]Version 1.4.3[/b]
[*]Fixed second core scaling wake issue.  Thanks TDR
[*]Only need a single build now as scaling works the way it should (Ya for me :D )
[*]Brought back (thanks Cybertronicz for digging it up)
[*]Autogroup Scheduler brought back (by Cybertronicz from .38 tree)
[*]Now using SLUB allocator
[*]Eliminated even more debug bloat
[*]HFS and HFSPlus file system modules for Mac users [request filled]
[*]Usb Mass Storage now stock in build.  Visit [URL="http://forum.xda-developers.com/showthread.php?t=1068999"]Mass Storage Tool Thread by dinomight[/URL] for implementation. (thanks Kcrudup for turning on lun0 for us ;D )

[b]Version 1.4.2[/b]
[*]Two builds! Overclocked to 1.6Ghz and 1.4Ghz.  If you had stability issues with 1.5Ghz, choose the 1.4Ghz. If 1.5Ghz ran fine for you, grab the 1.6Ghz.
[*]Just for now, kernel version had to drop to from
[*]All the popular file system and network mount modules including:
[*]CIFS for windows network mounts
[*]NFS and XFS
[*]TUN with full ipv6 support!
[*]AUFS for dual mount and other uses
[*]NTFS for mounting ntfs partitions
[*]nls_utf8.ko for foreing language network mounts
[*]And much more!
[*]Implemented USB Ethernet for USB Tether from phone to Xoom!
[*]Extreme debug bloat removal and massive kernel optimization
[*]Linpack 69 and Quadrant 4800! (on 1.6Ghz Performance governor)

[b]Version 1.4.1[/b]
[*]Mass Storage has been removed do to stability issues.  Your SD Card still works just fine without it!
[*]More updates from Google AOSP.
[*]Please visit Tiamat Xoom Kernel Github Repo for commit history.

[b]Version 1.4.0[/b]
[*]Mass Storage now enabled in Android with easy scripter script.  Thanks kcrudup for enable mass_storage_platform_device in board driver.
[*]Huge source update from tegra upstream.  Preparation for the elusive Motorola update we don't even need now!
[*]Found lost L2 Cache patch.  Linpack 65 and Quadrant 3000 out the box.
[*]Removed more bloat from kernel.  Much leaner and meaner.

[b]Version 1.3.2[/b]
[*]Now flashable through recovery!  No more fastboot nonsense!
[*]Upgrade to thanks Cybertronicz!
[*]Merged several branches from Kcrudup into Tiamat master.
[*]Removed debugging bloat from modules

[b]Version 1.3.1[/b]
[*]No kernel code modfications, just changes to init.stringray.rc and vold.fstab
[*]sdcard2 now shows up inside sdcard so it plays nice with system and gallery
[*]Make sure you follow special instructions in "How To Install"

[b]Version 1.3.0[/b]
[*]SD Card enabled! Look for "sdcard2" in root. Same install instructions as 1.1.6
[*]Huge thanks to kcrudup for ideas on gpio and "mount at boot" service. You da man!
[*]Thanks onicrom for helping with diagnostics and testing!
[*]Thanks cayniarb, bcnice20, and stiffspliff for teaching me so much!

[b]Version 1.1.6[/b]
[*]Only updated module, no kernel changes
[*]Modified tun.ko for Advanced IP Routing (untested, please provide feedback)

[b]Version 1.1.5[/b]
[*]Added tun.ko for OpenVPN support (untested, please provide feedback)
[*]Added cifs.ko for Windows Netshare (confirmed working)
[*]Modded ramdisk and vold.fstab for USB Hosting support (Thank's a million to Roebeet!)
[*]Works perfect with new OTA!

[b]Version 1.1.0[/b]
[*]Updates to memory patches
[*]Removed Smartass Governor. Need more research.
[*]Updates to wifi drivers for wifi-only device compatibility

[b]Version 1.0.0[/b]
[*]Initial release
[*]Implemented Smartass governer
[*]Enabled additional governers in Kconfig
How to Install

Instruction for flashing Tiamat Xoom 2.X.X Kernel

NOTE: These instruction assume you have flashed ClockworkMod Recovery and upgraded to Honeycomb 3.2!

Proceed to the Download Center post and grab your kernel.

1. Reboot into recovery.

2. Go into "mounts and storage"

3. Select "mount USB storage"

4. Your SD Card will now be mounted on your computer. Drop the kernel onto the external SD Card.

5. "Go Back" then go into "install zip from sdcard" then "choose zip from sdcard"

7. Back out to main menu and reboot.
Last edited:


Retired Recognized Developer
May 23, 2010
Download Center​

Only get Official Tiamat Xoom Kernel releases from this location or download from Kernel Manager. As a user and Android Enthusiast, you can rest assured that the releases from these sources are SAFE. These releases have been rigorously tested and are suitable for public release.
As a Tiamat Xoom Kernel User, you agree to the following terms and common sense principals

  • As an Android Enthusiast, you are responsible for having a basic understanding of commonly used tools. These include, but are not limited to, ADB, shell, fastboot, and ClockworkMod Recovery.
  • You agree to follow the instructions EXACTLY AS POSTED. With recovery and Kernel Manager, it should now be relatively easy to flash.
  • You agree that this is a kernel development thread on a development website. You will treat other users with dignity respect. Your posts will be easily understandable and productive.
  • You agree to NEVER ASK FOR TIMEFRAMES OR ETA'S. I have a boss at work, and at home, and it's not you. ;)
  • As an Android Developer, I pledge to release SAFE kernels that are as stable as possible. The goal of kernel development is to improve the performance, battery life, and provide additional functionality to Android devices.
  • I pledge to keep my Github repository up-to-date. You will ALWAYS be able to fork, pull request, or just review my source. In fact, I highly encourage user participation in the development process.
By clicking on the download links below, you agree to the terms and conditions set forth in the aforementioned paragraph.

Full repository of all versions, released and unreleased for the HTC Droid Incredible, the HTC Evo 4G, and the Xoom

General Overclocking Notes: 1.7Ghz is likely as far as we can push the Tegra2 cores. We have stress tested the heck out of 1.7 and it is safe. However, safe does not mean stable. Personally, I can run 1.7 on Interactive governor all day and it's smooth as butter. Other folks get reboots. If you can not run at 1.7, try 1.6. Everybody who tested was able to run at 1.504 without any problems. Just because this release is clocked to 1.7, that does not mean you can not run at stock speeds. Simply do not overclock. The settings for 1Ghz are identical to stock settings. I HIGHLY RECOMMEND you leave your device on INTERACTIVE. You may use Performance solely for benchmarking purposes, but then PUT IT BACK.​

Version 2.2.0 "Odachi" - Overclocked GPU
MD5sum: bfa60c8f70472d028bbf7380effb3c40

Version 2.2.0 "Odachi" - Stock GPU
MD5sum: 58a669e71c4db8fae3d29639b725cb54​

Kernel Archive:
[url=http://goo.gl/BuLAu]Version 2.1.0 "Tachi" - Overclocked GPU[/url]
MD5sum: 0b19881baa7f05e63dddc102945ea97b

[url=http://goo.gl/dbmNT]Version 2.1.0 "Tachi" - Stock GPU[/url]
MD5sum: ef8ced87e992aa8937d43c952a2d55bb

[url=http://bit.ly/qJUEqn]Version 2.0.0 "Katana" - Overclocked GPU[/url]
MD5sum: f6d64e4e81d2ac050ac1c603b1dbae84

[url=http://bit.ly/o0GUxv]Version 2.0.0 "Katana" - Stock GPU[/url]
MD5sum: 1fd6a9dfe9c977d53483cb87be258687
Last edited:


Retired Recognized Developer
May 23, 2010
Release Notes:

Version 2.2.0

Woah... it's been a while since the last kernel release!
For this release, I have to give a huge shoutout to kcrudup, who was able to obtain the new modem drivers that are required for 4G to function.
Other than the 4G support, we have also added support for the lagfree cpu frequency governor.

Your first boot may take a while, depending on how many applications you have installed. Mine took about 8 minutes.


Version 2.1.0

So here it is! The first kernel since the merge of Tiamat and Launchpad!
Firstly, thanks to TDR the wifi sleep issue is now fixed!
We have also fixed the under/overvoltage settings for 1.7 Ghz.

Missing from this release is Usb Mass Storage support. (Not usbOTG, where the Xoom is the usb host) In 3.2 we are able to access the external sdcard through the MTP protocol and removing support for this helps the stability of the usb connectivity on the xoom.
(USB Mass storage support is buggy)

We have also brought in a LOT of changes from nvidia with regards to bug patches and enhancements for the tegra platform.
Due to some of the changes by nvidia, when your device boots, after it displays the motorola logo it will show distortion before the boot animation. This is normal on this kernel and doesn't seem to effect the device at all.

You would of also noticed that we've moved to another thread from this release. This is to help differentiate between the 1.x.x series which is not supported on Android 3.2, and likewise with the 2.x.x on 3.1.
Last edited:


Senior Member
Jul 7, 2011
why "Removed the usb mass storage support. (being able to write directly to the external sdcard via your pc)", is there any problem arise from this?

EDIT : Sorry, didn't read your post. So excited actually. I also experienced reboot when connected to pc thru usb but i thought it's not the problem..hehhee.

EDIT 2: i don't know what wrong from CWM 3.2 after choose mount usb storage, i cannot see my external micro sd from my pc. I tried 2 times into recovery but still failed to detect my external sd card. If someone know the solution, please share with me. Because if i cannot find the solution, i cannot upgrade to this new kernel. Why? Because if i want to use my external sdcard, i will have to disable my 3g card just to remove the external sd card and connect it to my pc using micro sd card read.
Last edited:


Senior Member
Apr 6, 2011
The upgrade from the last gpu oc kernel went without incident. I did get a system lockup when viewing a video on cnet.com in dolphin hd and maximizing it while it was playing. The screen froze and there was a buzzing sound coming from the speakers. I forced a reboot, two button salute, but was not able to reproduce it while watching the same video.
So far it's nice and responsive. Boy do we get frequent updates with far better results than from Motorola/google.