Relob, you are a genius. You have found what any number of us have been looking for for months, and which Microsoft, Sony, and NVidia have been unable (or unwilling) to solve.
1080P FOR EVERYONE!
Your solution worked perfectly, and I don't even have the latest drivers. I reconnected my spare hard drive with Ultimate (which has had 1080P working since day 1), searched for the key, and found there was no DisableHDTV key...which would be functionally equivalent to having it but setting it to 0. This explains absolutely everything: why Ultimate does 1080P while Home doesn't, even though they can be installed off the same DVD (or course they would have different registry entries; they'd have to, wouldn't they?)...and why some installers of Ultimate couldn't get 1080P to work (they no doubt have the offending key in their registry)...why other HDPCs like Niveus get 1080P in Home with the same card...and most of all, why I could get 1080P to come up (although with undesireable side effects) in Home by deliberate installing the wrong driver: it would have used a different set of registry keys!
The entire XL3 community, or at least anyone who trips upon this thread, are in your debt. BTW, there are people with other machines - including laptops - with NV7600s who have reported the same problem. Your solution may apply to many or even all of them.
I can confirm that this fix does not affect normal operation, playback, or recording. Time will tell it if has any long-term effects but I'm betting "no." 12/27/07 UPDATE: half-way to the "magic" 30-day milestone, everything okay so far.
1. Start > Run > Regedit
2. If the left panel is not scrolled to the very top, manually scroll to the top and click once on "Computer" to highlight it.
3. Edit, Find. Type "DisableHDTVRes" in the box and click Find.
4. When DisableHDTVRes appears highlighted in the right panel, double-click on it.
5. Type "0" and click OK.
6. Edit, Find Again.
7. When DisableHDTVRes appears highlighted in the right panel, double-click on it.
8. Verify that the value is "0." If it isn't, type "0" and click OK.
9. Repeat steps 6 through 8 until you receive a "Finished searching the registry" message or the value displayed is 0. (What's happening is that the DisableHDTV key may be stored in several locations throughout the registry - twice in mine. Once it's found all of them, RegEdit will loop around to the beginning again, and of course the first instance it finds will be the first one you already changed to 0 so now you know you found them all).
10. Close RegEdit, shut down the PC, turn the PC back on.
11. Right-click the desktop, click Personalize, click Display Settings, click Advanced Settings, Monitor.
12. The "Screen Refresh Rate" dropdown should now contain choices for 50Hz and 60Hz (previously all you saw were 29Hz and 30Hz). Choose 60Hz, OK, OK, and you're done. This may or may not also be possible through the NVidia applet depending on which version of the NVidia Control Panel you have.
Not only do I confirm that the 60Hz selection is there, and not only do I confirm that my monitor now reports "1080P 60Hz"...I can also confirm that the screen looks much, much better.
Thank you again!!!
P.S. Those of you with Blu-Rays: let us know how 1080P works (if it looks better, fills the screen or underscans/overscans, etc.) 12/27/07 UPDATE - see my posts on Page 9 re. Blu-Ray and 1080p; short answer is it works, but download those Sony BRD updates.
Originally Posted by relobe
I found this forum yesterday when trying to enable 1080p on my XL302 (i.e. the European version of the XL3). Like you, I could only get 720p or 1080i out-of-the-box no matter what drivers etc. Eventually, I ended up comparing the video card driver shipping with the XL302 (v. 97.xx?) and the latest official nVidia one (v. 163.75) via the driver recommended by Sony (v. 98.13).
I found that the early drivers had a flag 'DisableHDTVRes' set to '1', so I fired up regedit and changed that DWORD to a '0', rebooted and got 1080p working in all its glory under Vista Home Premium using the 163.75 driver.
Even though I've got a 302, I believe it's the same 7600GTL graphics card so it could be worth giving it a try.