HDTV not correctly recognized by computer?

[Peter.Steele]

Okay, so we just got a new TV in the living room, and moved the old one to the bedroom for running Netflix at night for fall-asleep time. For the first few days, everything was fine. Plug my wife's laptop in via HDMI, turn the TV on, and everything's good.

THEN ... things changed. both of our laptops are now recognizing the TV as 1080p, rather than 720p, which is what it is. It's now trying to display the 1600x900 (monitor resolution) on the TV as if it were 1920x1080, so that means it's only showing the first 1280x720.

Nothing changed on the physical setup. It does the same thing with both of our computers.

TV is a 50" DLP, Philips model 50PL9126D. Computers are both HP, one of them with Radeon HD Mobility 3300, the other with 5650. The older one is running Vista x64, the newer one is Win 7 x64.

Any ideas or suggestions?

[dmax11]

Sounds like your running I'm clone mode you should set it to independent mode then you can set the resolution to whatever works best for your tv

Sent from my Nexus One using Tapatalk

[Peter.Steele]

Sounds like your running I'm clone mode you should set it to independent mode then you can set the resolution to whatever works best for your tv

Sent from my Nexus One using Tapatalk

Nope, it's independent.

In clone mode, I can force the Win 7 laptop to actually display correctly, sort of. Up until the last couple days, I could just plug in the HDMI cable and Windows would automatically say "okay, there's a TV connected now" and then hey-presto, the display would be in 720p on the TV.

Not so much anymore, though ...

[high_revs]

so you all the display output modes (or 2 of them).

is the lid open or closed? sometimes, it makes a difference. i can only get 1920x1080 on our vaio with the lid closed, but not open. same thing with a hp laptop.

[Deadbolt]

for what its worth i had a similar issue with a 120hz samsung 46" lcd

What I was experiencing : in full HD resolution ,there was a 1.5-2" black border around my picture.

I am running ATI 5750 HD. Updating the drivers solved the issue. gl!

[Peter.Steele]

so you all the display output modes (or 2 of them).

is the lid open or closed? sometimes, it makes a difference. i can only get 1920x1080 on our vaio with the lid closed, but not open. same thing with a hp laptop.

Tried all of the modes.


Laptop only, of course that works. TV only, you get just the first 1280x720 of what the computer projects to be a 1920x1080 upconversion of 1600x900 (if that makes any sense) because it thinks the TV is 1080p. Clone display ... sometimes it works, sometimes it doesn't. On the older HP it doesn't work - it flashes in and out, goes black a lot, then comes back, then goes black, lather-rinse-repeat. With the newer one, clone display works perfectly, but there's the same problem if you have only the TV as the display.

Last night, for a brief little while, it worked correctly with the older laptop. The new one still had the same issues.

Re: closing the lid - can't do that. Suspend is turned on, and even if it wasn't , neither one of these handles the heat very well with the lid closed.


I should probably note - just to forestall any questions - that the TV works fine with blu-ray, media boxes, or cable boxes hooked up through HDMI, except for occasional HDCP issues with the Motorola cable box.