[EVO 4G Q&A, Help & Troubleshooting] AbsolutZeroGI:
This isn't true, the problem is ALWAYS the kernel. I'm running myn rls5 and mikfroyo 4.3 with an SBC #15 v7 kernel (i'll edit post and add the link) and I have had zero issues except I can't download MMS messages on 4g on mikfroyo.

Okay, this process will 100% work. It's the one I've been using since my lowly mytouch slide oh so many months ago.

*before you do this, make sure you have backups of your nandroid and your rsa keys. I'll edit post and give you links on how to back up your rsa keys*

RSA Key back-up: http://xdaforums.com/showthread.php?t=887900 ...since you're rooted you can go straight to the part where it says "if you're rooted do this.."

1. First you need to fix the sd card. Create a folder on your computer desktop and call it "my sd card". Plug your phone into the computer and select "disk drive". Next you're going to copy EVERYTHING from the sd card and place it in the folder on the desktop (and dude I mean everything! AS IS, DON'T CHANGE ANY NAMES). Then, you're going to unhook your phone, go to settings>sd and phone storage. Then you're going to format your sd card. Yes, do it, but make sure you have EVERYTHING backed up first. After that's done, plug your phone back in, select disk drive and copy everything from your "my sd card" folder on your computer and put it back onto your sd card.

*phew*

Okay now that the sd problem is fixed, here's how you fix the rest. You see, when you upgrade your PRI to 1.90 and your radio, etc etc you gotta update the kernel to a version that's 1.90 supported. I'll edit post and post a link to where you can find one OR you can just use the kernel that's included with myn's rom because it WILL WORK. *edit* the kernel I'm using has been taken down because of the witch hunt against SBC kernels. So for now, just stick with stock. It works just fine.

Anyway.

Steps to getting myn working perfectly.

*before starting, re-download myn rls5 in case the screen flickering was caused by a corrupted download*

1. Download Titanium Back-up from the market. Back up all the apps you want to keep (basically, anything you downloaded from the market as you'll get facebook, sense widgets, etc back). You can do this while you re-download the rom.

2. Make a nandroid back-up in case something goes seriously wrong. A rom that flickers your screen is better than a brick.

3. Once that back-up is done, reboot into recovery. Once there, you're going to WIPE EVERYTHING. Full data, cache and dalvik wipe. Yes, do it. There is no other option.

3. Flash myn's rom. Let it go all the way through. Do NOT flash a new kernel until you've found one that's 3.70 compatible and works with PRI 1.90. Myn rls5 is designed to work with the newest updates (which means a #15 kernel, like the one that came stock).

4. Reboot. If the screen is still flickering, then at this point it's a hardware problem. Flash back to stock, unroot and go get a new one. If it works fine, re-download titanium back-up from the market and restore all your apps. From there it's just putting your widgets back on your home screen.

From here, you can search the forums for a kernel that works with the newest updates. If you read them, they'll tell you what they're compatible with. Remember do NOT use an AOSP kernel with a SENSE rom, that's just spells IDIOCY. Until you find a kernel that works, stick with the one that came with the rom because everyone knows that one works.

I hope this helps. As for the IRC chat, not all the experts are on all the time. If no one is online that can help when you get one, try getting a few hours earlier or a few hours later.