[Galaxy Tab  Android Development] Flynn:
TL;DR:

Beginning: Galaxy Tab (GSM), 2.2 Froyo

Goal: Android 4.x

Stuck at: Gingerbread with unreadably flickering/garbled/distorted/snowy bootloader and CWM recovery

Detailed Process:

I wanted to update my father's Tab to one of the latest Android versions. My first thought was to look for Cyanogenmod, which listed as a prerequisite to have Clockwork Mod installed. That in turn was hinted to be best installed alongside Overcome. And that again needed root access and an unlocked bootloader.

So, starting with

Samsung Galaxy Tab GT-P1000, black back cover, bought from german electronic chain

Firmware: 2.2

Basisband: P1000XXJMF

Kernel: 2.6.32.9, root@SEP-53 #1

Build: FROYO.XXJMG

I followed the Overcome guide I found ( http://xdaforums.com/showthread.php?t=1881981 ) and did these steps:

1) Rooting with "SuperOneClick 2.3.3" -> success, new app: Superuser (guide: http://xdaforums.com/showthread.php?t=803682 )

2) unlocking bootloader with "SGT Bootloader Patch 1.00" -> success (guide: http://xdaforums.com/showthread.php?t=888071 )

3) Flashing "GB Stock Safe v5" + "JMF modem" with Odin3 1.7 -> no errors displayed

system booted fine, I was now on Gingerbread, but no Clockworkmod Recovery was installed, it was still e3, root was gone and the bootloader was signed again.

4) Since step 9 of the Overcome guide expected CWM installed by now I thought something wasn't right and I repeated steps 1) + 2) (I think I messed up here :( ). Both reported success, but when rebooting after the Bootloader Patch the bootloader began to show a distorted, flickering unreadable screen.

* Standard boot goes like:

-> Galaxy Tab logo

-> colorful vertical lines coming from the left leaving an unreadable flickering on the whole screen (comparable to image attached to post 581)

-> clean Samsung logo animation

-> back to the garbled mess with a little of the Galaxy Tab logo still visible in the background

-> login bar with top bar and clock appearing and overlaying the messy screen, then the background appears and replaces the rest of the messy screen

-> continue normal

* Booting to Recovery ends at the garbled screen with two thirds showing the Galaxy Tab logo and the left third with the "funky" vertical lines requiring blind operation of the recovery menu (for which I lack the xperience to do so)

* At least the system is rooted again and the Patch shows unsigned bootloaders.

* Download mode still works fine

5) I suspected a messed up bootloader so I went back to Download Mode and flashed "CF-Root-TAB7_XX_OXA_JQ1-v3.3-CWM3RFS.tar" -> no errors during flashing, new apps: CWM, Tweaks (guide: http://xdaforums.com/showthread.php?t=885734 )

so now I have Gingerbread with CWM but the flickering didn't change.

Firmware: 2.3.3

Basisband: P1000XXJMF

Kernel: 2.6.35.7, se.infra@SEP-52 #2

Build: GINGERBREAD.XXJQ1

Q) Now I am cautious about what will repair things and what make it even worse. How do I best proceed now to get to a cleanly displaying bootloader and a bloatfree Android 4.x system on the Tab (the camera postively definately HAS to work at the end (I caught that it can be a tricky part to get working with new firmwares))?

btw: Is the Overcome guide wrong showing a CWM Recovery at step 9/page 11, since I didn't get it while flashing GB Stock Safe v5?