[Galaxy Tab 10.1 Android Development] zefie:
Tips and Tricks:

Gentoo Knowledge

The use of this OS assumes you know how to use Gentoo on a Desktop PC. If not, or you would like a refresher, please read the Gentoo Handbook. Please read this prior to asking any non-SGT specific configuration questions. Please skip the "Installing Gentoo" section. I've got that covered for you :)

Accessing Clockwork MOD Recovery

You cannot 'reboot recovery' in linux. So, to access recovery, simply reboot. When the screen backlight turns off, hold VOL DOWN until you get the fastboot menu. It's that simple :)

Accessing your Gentoo install from Recovery

You can access the root partition of your Gentoo install in Clockwork Recovery. You can mount /data quickly by choosing 'Install from SD Card', 'Choose update.zip'. When CWM says 'no file found', /data is mounted.

Future Kernel Updates

As time passes, I may release a new kernel, with additional modules, features, scripts, or workarounds. These can be installed via CWM like an Android Update ZIP. While running Gentoo, update zips are stored in /media. While running recovery, updates are available under /data/media. Be sure to mount your Gentoo install as stated above before attempting to adb push any update zip files. You can also install kernel updates from the OtherOS environment using this script.

Future Update Possiblities

Right now I only have plans to update the kernel via CWM update.zip. OtherOS primary releases will likely be in Odin format. However, enthusiasts, or devs branching off into their own project may like to know that, since you have access to the entire root partition (ext4) via CWM, you can basically patch anything. Store your rootfs in a tar, and extract it via /tmp in your update.zip to preserve permissions. Your only limitation is the RAMDisk of recovery (or not, if you are tactical).

Disable Overclocking from CWM

If you are having problems with your SGT crashing, your SGT may not support 1.4ghz. Simply access your root partition via CWM as explained above, and remove the file /data/etc/local.d/SGT_cpu_oc_1400.start

Set up Wifi without USB OTG

As it stands, you will need a USB input adapter to use your Gentoo system, because I cannot possibly auto-configure your wifi. I know for most people, this is a setback, however you can configure your Wifi manually and push the file back in CWM. Access root from CWM, as explained above, and pull the following file: /data/etc/conf.d/net

Edit it as necessary and push it back, be sure to set its permissions to 0644 before attempting to reboot back into Gentoo.

Change your Wifi MAC Address

There is a hidden file the Wifi Driver uses, /data/.mac.info (/data/data/.mac.info via CWM). Inside this file you will find a MAC address. Once this file is changed, the next time the dhd module (wifi) is loaded, it will use the MAC Address specified in the file.

Recovering from a crash

This is still in alpha status. There may come a time (for example, if you hit Caps-Lock on an external keyboard) where your system will hard lock. You do not have to let the battery drain, you can force the system to reboot by holding the power button for approximately 10 seconds. Release the power button when the screen backlight turns off. Please be advised this is not suggested for normal shutdown, and only for use if the system is not responding.

Touchscreen Guide (requires kernel update m1-2012-03-24 or newer)

Light Single Touch = Move Mouse

Hard Touch = Left Mouse Button

Light Two-finger Touch = Right Mouse Button (from left finger position)