External Samsung Display broken @ 1920x1080 after Lion upgrade

Hi,
The more I use Mac OS 10.7 Lion the more I notice it's defects and the more I get upset with it.
After the WIFI issue (wifi network does not reconnect after sleep mode) I am now facing an issue with my external display.
I have actually two MacBook Pro unibody from 2009. One is a 13' with Mac OS X 10.6.8 the second one is a 15' from the same year recently upgraded to Lion 10.7. I used to watch movies on my Samsung TV using a VGA cable connected to a Mini DVI to VGA Adapter with the TV native resolution of 1920x1080.
It used to work flalessly on my MBP 15' 10.6.8 but since the Lion upgrade the screen seems not to support this mode anymore. The image on the TV apprears for 2 seconds then disappears for 3 seconds and so on...
I checked that the very same configuration still works on the MBP 13' with 10.6.8.
It clearly means that Lion broke this.... oh crap....
I was really expecting less bugs from Apple. Well at least I am now expecting a way to fix this issue.
PLEASE.
I have found other similar (unanswered) messages, I am linking them here:
1080p@50/60Hz on TV over AV-Receiver broken
https://discussions.apple.com/message/15729194
External monitor does not display 1080p after OSX reinstall
https://discussions.apple.com/message/15722024
Regards,
Xavier

Good News Here
I was able to fix my problem, i called the Apple Support to report my issue, they pointed me to this link:
http://support.apple.com/kb/HT1573
So here is *exactly* what I did, step by step, to solve my issue:
1. Shut down the Mac,
2. Press the power button to start the computer,
3. Immediately press and hold the Command (Apple) key and the "s" key for single-user mode (Command-S)
4. At the prompt, type the command "mount -uw /" and press Return.
5. Now do the following:
> rm /Library/Preferences/com.apple.windowserver.plist (press return)
> cd /Users/<username>/Library/Preferences/ByHost (press return)
(Replace the text "<username>" above with your username, which is also the name of your Home folder)
> rm com.apple.windowserver.*.plist (press return)
> reboot (READ the next item BEFORE pressing return, you will need to reset your Mac's PRAM and NVRAM, the next point explains how)
6. When rebooting press and hold the "Command", "Option", "P" and "R" keys. You must press this key combination before the gray screen appears. Hold the keys down until the computer restarts and you hear the startup sound for the SECOND time.
7. Release the keys to proceed with normal startup.
8. Once ready, connect your external display and... pray.
For me it worked, I now have my full HD resolution (1920x1080) back on my Samsung TV.
Hope it works for you too guys, keep me posted !
Cheers,
Xavier

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