Samsung LN-T3253H TV no longer displays computer's HDMI 1080p (1920×1080) resolution

Geremia · 12-23-2012, 08:57 PM

My Samsung LN-T3253H TV no longer displays video sent from my laptop's HDMI port at 1080p (1920×1080) resolution. It used to work, but sound didn't; now that sound through HDMI works, the 1920×1080 resolution doesn't. I tried this a few times

Code:

$ cvt 1920 1080
$ xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
$ xrandr --addmode HDMI-0 "1920x1080_60.00"
$ xrandr --output HDMI-0 --mode "1920x1080_60.00"

, but sometimes it tried changing my laptop's screen to 1080p, cropping it, not changing the HDMI TV's resolution. When it tries to change the TV, the TV just says "Not Supported Mode", when before 1920×1080 showed up as a resolution without my even having to add it manually with xrandr.

I really wonder why it worked before, especially since the TV's manual says the max resolution is 1360×768.

Also, I'm currently using KDE 4.9.4, but previously, when I got it to work, I think I was using KDE 4.8.

Perhaps it was scaling it before? Although 1280×720, the highest resolution the display system settings in KDE gives me, doesn't look nearly as sharp as 1920×1080 when 1920×1080 worked.

Thanks

UPDATE: I was able to get the extra resolution, 1360×768, by plugging into the 1st (not 3rd) HDMI port on the TV, so it certainly can display higher than 1280×720 resolution, and Phonon's audio still works, too, but running the above still made the TV display the "Not Supported Mode" error.

H_TeXMeX_H · 12-27-2012, 01:20 PM

Can you post the output of 'xrandr --prop' when the HDMI cable is plugged in, it should list all supported modes and options there.

business_kid · 12-28-2012, 10:55 AM

What about the refresh rate? The horizontal frequenc is often the limiting factor here. at 1920x1080@60hz refresh, the horizontal frequency is under 65,000, But at 1920x1080"75khz, you need a horizontal rate of over 80Khz. Set for 1920x1080@60hz.

Geremia · 12-28-2012, 06:42 PM

Quote:

Originally Posted by business_kid

Set for 1920x1080@60hz.

That's what I tried.

business_kid · 12-29-2012, 02:58 AM

Better try what H_TeXMeX_H suggested then.

Geremia · 12-30-2012, 06:42 PM

Quote:

Originally Posted by H_TeXMeX_H

Can you post the output of 'xrandr --prop' when the HDMI cable is plugged in, it should list all supported modes and options there.

Here's the output of 'xrandr --prop':

Code:

HDMI-0 connected 1360x768+0+0 160mm x 90mm
        EDID:
                00ffffffffffff004c2d980200000000
                2d1001038010098c0ae2bda15b4a9824
                15474aa1080001010101010101010101
                010101010101662150b051001b304070
                3600a05a0000001e011d007251d01e20
                6e285500a05a0000001e000000fd003b
                471e3209000a202020202020000000fc
                0053414d53554e470a20202020200109
                020317f1438405032309070783010000
                66030c00100080011d8018711c162058
                2c2500a05a0000009e8c0ad08a20e02d
                10103e9600a05a000000180000000000
                00000000000000000000000000000000
                00000000000000000000000000000000
                00000000000000000000000000000000
                00000000000000000000000000000084
        Broadcast RGB:  Full
                supported: Full         Limited 16:2
        audio:  auto
                supported: off          auto         on          
   1360x768       60.0*+
   1280x720       60.0  
   1024x768       60.0                                                                                                                                                                         
   800x600        60.3                                                                                                                                                                         
   640x480        60.0                                                                                                                                                                         
   720x400        70.1

merry Christmas

H_TeXMeX_H · 12-31-2012, 03:12 AM

Well, as you can see from that output the highest supported resolution is 1360x768 at 60 Hz.

You should check the manual and see if it can do more than 60 Hz, if it can't then you just can't get that resolution safely.