Sony KDL-40NX711

[hyperlogos]

I got this 3dtv for $50 but I didn't get any of the 3d stuff.

I am wondering if it's possible to do 1080p120 on this TV.

I can't get into the 3d settings because the transmitter is not connected, since I don't have it.

[Chief Blur Buster]

I got this 3dtv for $50 but I didn't get any of the 3d stuff.

I am wondering if it's possible to do 1080p120 on this TV.

I can't get into the 3d settings because the transmitter is not connected, since I don't have it.

Don't use 3D settings, but instead follow the instructions at True 120Hz From PC to TV, a method for tricking 120Hz modes on old 3DTVs that used frame-sequential shutter glasses.

[hyperlogos]

I'm on Linux, and I didn't see how I could apply too much of that to my situation.

I've tried creating some custom modelines, but the nvidia driver doesn't seem to make use of them. I am using a recent (hopefully latest) binary driver.

These are the modes which are announced by my display, from xrandr --verbose:

1920x1080 (0x1c0) 148.500MHz +HSync +VSync *current +preferred
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.00Hz
1920x1080 (0x1c1) 148.350MHz +HSync +VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.43KHz
v: height 1080 start 1084 end 1089 total 1125 clock 59.94Hz
1920x1080 (0x1c2) 74.180MHz +HSync +VSync
h: width 1920 start 2558 end 2602 total 2750 skew 0 clock 26.97KHz
v: height 1080 start 1084 end 1089 total 1125 clock 23.98Hz
1280x1024 (0x1c3) 108.000MHz +HSync +VSync
h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 63.98KHz
v: height 1024 start 1025 end 1028 total 1066 clock 60.02Hz
1280x720 (0x1c4) 74.250MHz +HSync +VSync
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 45.00KHz
v: height 720 start 725 end 730 total 750 clock 60.00Hz
1280x720 (0x1c5) 74.180MHz +HSync +VSync
h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 44.96KHz
v: height 720 start 725 end 730 total 750 clock 59.94Hz
1024x768 (0x1c6) 65.000MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.36KHz
v: height 768 start 771 end 777 total 806 clock 60.00Hz
800x600 (0x1c7) 40.000MHz +HSync +VSync
h: width 800 start 840 end 968 total 1056 skew 0 clock 37.88KHz
v: height 600 start 601 end 605 total 628 clock 60.32Hz
720x480 (0x1c8) 27.000MHz -HSync -VSync
h: width 720 start 736 end 798 total 858 skew 0 clock 31.47KHz
v: height 480 start 489 end 495 total 525 clock 59.94Hz
640x480 (0x1c9) 25.175MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.47KHz
v: height 480 start 490 end 492 total 525 clock 59.94Hz
640x480 (0x1ca) 25.170MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.46KHz
v: height 480 start 490 end 492 total 525 clock 59.93Hz

I found it interesting that there's two slightly different 1080p modes.

[hyperlogos]

I did figure out how to get the TV to accept my 1080p120 modeline, not sure if I constructed it right though.

In the /etc/X11/xorg.conf,

In the Monitor section:
ModeLine "1080p120" 297.00 1920 2008 2052 2200 1080 1084 1089 1125

In the Screen section:
Option "ModeValidation" "DFP-3: AllowNonEdidModes, AllowNon60HzDFPModes, NoMaxPClkCheck, NoEdidMaxPclkCheck, NoHorizSyncCheck, NoVertRefreshCheck, NoEdidDFPMaxSizeCheck, NoPredefinedModes"

It's DFP-3 here anyway, I got it from the Xorg.0.log file.

[Chief Blur Buster]

Great! You've effectively done a Linux modeline equivalent of the old FAQ.

Does TestUFO properly show 120Hz nowadays in your web browser? Old Linux distros weren't very high-refresh-rate friendy.

[hyperlogos]

Unfortunately, when I tell it to do 1080p120 I get input out of range.

I guess one of the 1080p modes is 59.96 maybe, but they both show up as 60Hz (just with a (1) and a (2)) in nvidia settings.

[hyperlogos]

I also found another way to easily switch to/from 120Hz on Linux:

$ xrandr --output HDMI-1 --mode 1920x1080 --rate 120
$ xrandr --output HDMI-1 --mode 1920x1080 --rate 60

This probably requires at least some of the mode validation options above.

Still get out of range though.

[Chief Blur Buster]

Try 720p 120Hz instead.

Some old 3D 1080p 60Hz TVs only support 720p 120Hz.

Make sure you recycle the broadcast standard ATSC 720p HDTV modeline, except with refresh rate multipled exactly by two. It's twice the dot clock.

[hyperlogos]

Not interested if I can't get 1080p120. This is already not very many dots for a 40" when I am sitting at it. I'll just keep saving my pennies for a 4k that does at at least 1080p120 if not 4k120.