Video mode not supported - after installing Lion

Hi All,
I installed the new Lion OS on my Mac Mini, all went great and clean.
But,
after 2 days of playing with the new OS cool new features I shutdown the Mac Mini and a day later when I started it my TV (Philips HDMI) could not recognized the video format and a message from my TV said "Video Mode Not Support" (I use the HDMI output to an HDMI port on my TV)
I went to my apple reseler and they reset my PRAM.
When I plugged it again at home it was working again.
Then I restarted it to check all is good... and again "Video Mode Not Supported"
It never happen with OS X Snow leopard. so I guess something is not working as it need to on the new Lion version.
I'm not sure if there is a workaround until Apple will release a fix but if someone know how to fix it, ill be happy to know...
thanks
the hard part is that I dont have a wired keyboard or another display so I must go to Apple to get it solve each time it happens
Eran

Hi Markus.
Im trying the update software once in a while but still nothing... I'm keeping my MacMini up and runing cus I know that if i will shout it down it will not come back with the right display driver.
anyhow, it did happend once that I shut it down and then it didnt work again after it came back on, so I played with it a little, i took it out of the power outlet and try a few clicks on startup like alt ctrl P and R and cmd + F1 and few other thing and after a few tries it did work... I have now idea why and what actually made it work again but one thing I can say its that the new Lion version have anything it needs in order to work curectly the problem is that somewhere along the startup process (and now im gussing) the OS select a wrong driver for the attached display (in our case Philips) and send a video format to the display that cant be recognaized by the display.
I realy hope pple will issue a fix to this problem soon!! cus in adition to that I have some zoom issues too which im not sure where it is coming from and if it have to do with our issue.
Anyway we all hope it will be solve soon.
Have a good one... Eran

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