Bad overscan with 945 to TV

t-roy1015 · ‎11-03-2008

Hi all, I have been trying to output from my computer to LCD tv and am having real bad overscan issues.

I would only like to be able to watch moveis from my desktop to my tv.

I have been reading quite a bit on this issue and know there are problems with my setup.

Here is what I have:

945 chipset outputting through the DVI to HDMI connector.

TV is a Sanyo 37" Vizzon. Native resolution per website is 1366x768. This TV only has 3 HDMI ports. (Wish there was a VGA!)

I do not mind running at 1280x720 but I am missing some realestate on the tops and the sides.

I have tried to use DTD calculator to run at 720p and adjust the overscan issue, but my monitor or GPU will not allow it.

Any help I can get on this would be greatly appriciated!!.

Thank you in advance.

Here is my EDID:

Monitor Asset Manager Report, generated 10/30/2008 (5.1.2600)
Copyright (c) 1995-2008, EnTech Taiwan.
---------------------------

Hardware data
BUS_SLOT = PCI00000.PCI00004.PCI00008.PCI0000C.PCI00010.PCI00014.PCI00018.PCI0001C
00000000 = 27708086.20900106.06000002.00000000.00000000.00000000.00000000.00000000
00000010 = 27728086.00900007.03000002.00800000.FEB00000.0000E899.E0000008.FEAC0000
00000011 = 27768086.00900007.03800002.00800000.FEB80000.00000000.00000000.00000000
000000E0 = 27D08086.00100107.06040001.00810010.00000000.00000000.00010100.000000F0
000000E1 = 27D28086.00100107.06040001.00810010.00000000.00000000.00020200.200000F0
000000E8 = 27C88086.02800005.0C030001.00800000.00000000.00000000.00000000.00000000
000000E9 = 27C98086.02800005.0C030001.00000000.00000000.00000000.00000000.00000000
000000EA = 27CA8086.02800005.0C030001.00000000.00000000.00000000.00000000.00000000
000000EB = 27CB8086.02800005.0C030001.00000000.00000000.00000000.00000000.00000000
000000EF = 27CC8086.02900106.0C032001.00000000.FFA80800.00000000.00000000.00000000
000000F0 = 244E8086.00100107.060401E1.00810000.00000000.00000000.20030300.228000F0
000000F2 = 27DE8086.02900007.04010001.00000000.0000EC01.0000E8C1.FEABFA00.FEABF900
000000F8 = 27B88086.02100107.06010001.00800000.00000000.00000000.00000000.00000000
000000F9 = 27DF8086.02800005.01018A01.00000000.000001F1.000003F5.00000171.00000375
000000FA = 27C08086.02B00005.01018F01.00000000.0000FE01.0000FE11.0000FE21.0000FE31
000000FB = 27DA8086.02800101.0C050001.00000000.00000000.00000000.00000000.00000000
00000100 = 167714E4.00100006.02000001.00000010.FE9F0004.00000000.00000000.00000000
--------
01040000 = 00FFFFFF.FFFFFF00.4C2E230B.00010100.00110103.80100978.0ADB0BA3.58459B25
00000020 = 13464820.00000101.01010101.01010101.01010101.0101011D.8018711C.1620582C
00000040 = 25001009.0000009E.011D0072.51D01E20.6E285500.10090000.001E0000.00FC0053
00000060 = 414E594F.204C4344.0A202020.000000FD.003B3D0F.2E08000A.20202020.20200123
01040100 = 02031A71.47850402.03060701.26090707.15073C66.030C0010.00808C0A.D08A20E0
00000020 = 2D10103E.96000403.00000018.8C0AD08A.20E02D10.103E9600.10090000.00188C0A
00000040 = A01451F0.1600267C.43000403.00000098.8C0AA014.51F01600.267C4300.10090000
00000060 = 0098D609.80A020E0.2D101060.A2000403.00000018.00000000.00000000.000000B8

---------------------------

Monitor #1 [Real-time 0x0041]
Model name............... SANYO LCD
Manufacturer............. Sanyo
Plug and Play ID......... SAN0B23
Serial number............ 65792
Manufacture date......... 2007, ISO week 0
-------------------------
EDID revision............ 1.3
Input signal type........ Digital
Color bit depth.......... Undefined
Display type............. RGB color
Screen size.............. 160 x 90 mm (7.2 in)
Power management......... Not supported
Extension blocs.......... 1 (CEA-EXT)
-------------------------
DDC/CI................... Not supported

Color characteristics
Default color space...... Non-sRGB
Display gamma............ 2.20
Red chromaticity......... Rx 0.640 - Ry 0.345
Green chromaticity....... Gx 0.271 - Gy 0.608
Blue chromaticity........ Bx 0.145 - By 0.074
White point (default).... Wx 0.275 - Wy 0.284
Additional descriptors... None

Timing characteristics
Horizontal scan range.... 15-46kHz
Vertical scan range...... 59-61Hz
Video bandwidth.......... 80MHz
CVT standard............. Not supported
GTF standard............. Not supported
Additional descriptors... None
Preferred timing......... Yes
Native/preferred timing.. 1920x1080i at 60Hz (16:9)
Modeline............... "1920x1080" 74.250 1920 2008 2052 2200 1080 1084 1094 1124 interlace +hsync +vsync
Detailed timing #1....... 1280x720p at 60Hz (16:9)
Modeline............... "1280x720" 74.250 1280 1390 1430 1650 720 725 730 750 +hsync +vsync

Standard timings supported
640 x 480p at 60Hz - IBM VGA

EIA/CEA-861 Information
Revision number.......... 3
DTV underscan............ Not supported
Basic audio.............. Supported
YCbCr 4:4:4.............. Supported
YCbCr 4:2:2.............. Supported
YCbCr 4:2:2.............. Supported
Native formats........... 1
Detailed timing #1....... 720x480p at 60Hz (4:3)
Modeline............... "720x480" 27.000 720 736 798 858 480 489 495 525 -hsync -vsync
Detailed timing #2....... 720x480p at 60Hz (16:9)
Modeline............... "720x480" 27.000 720 736 798 858 480 489 495 525 -hsync -vsync
Detailed timing #3....... 1440x480i at 60Hz (4:3)
Modeline............... "1440x480" 27.000 1440 1478 1602 1716 480 488 494 524 interlace -hsync -vsync
Detailed timing #4....... 1440x480i at 60Hz (16:9)
Modeline............... "1440x480" 27.000 1440 1478 1602 1716 480 488 494 524 interlace -hsync -vsync
Detailed timing #5....... 640x480p at 60Hz (4:3)
Modeline............... "640x480" 25.180 640 656 752 800 480 490 492 525 -hsync -vsync

CE video data (timings supported)
1920 x 1080i at 60Hz - HDTV (16:9, 1:1) [Native]
1280 x 720p at 60Hz - HDTV (16:9, 1:1)
720 x 480p at 60Hz - EDTV (4:3, 8:9)
720 x 480p at 60Hz - EDTV (16:9, 32:27)
720 x 480i at 60Hz - Doublescan (4:3, 8:9)
720 x 480i at 60Hz - Doublescan (16:9, 32:27)
640 x 480p at 60Hz - Default (4:3, 1:1)
NB: NTSC refresh rate = (Hz*1000)/1001

CE audio data (formats supported)
LPCM 2-channel, 16/20/24 bit depths at 32/44/48 kHz
AC-3 6-channel, 480k max. bit rate at 32/44/48 kHz

CE vendor specific data (VSDB)
IEEE registration number. 0x000C03
CEC physical address..... 0.1.0.0
Supports AI.............. Yes
Supports 48bpp........... No
Supports 36bpp........... No
Supports 30bpp........... No
Supports YCbCr 4:4:4..... No
Supports dual-link DVI... No
Maximum TMDS clock....... 165MHz

Report information
Date generated........... 10/30/2008
Software revision........ 2.11.0.744
Raw data................. 00,FF,FF,FF,FF,FF,FF,00,4C,2E,23,0B,00,01,01,00,00,11,01,03,80,10,09,78,0A,DB,0B,A3,58,45,9B,25,
......................... 13,46,48,20,00,00,01,01,01,01,01,01,01,01,01,01,01,01,01,01,01,01,01,1D,80,18,71,1C,16,20,58,2C,
......................... 25,00,10,09,00,00,00,9E,01,1D,00,72,51,D0,1E,20,6E,28,55,00,10,09,00,00,00,1E,00,00,00,FC,00,53,
......................... 41,4E,59,4F,20,4C,43,44,0A,20,20,20,00,00,00,FD,00,3B,3D,0F,2E,08,00,0A,20,20,20,20,20,20,01,23,
......................... 02,03,1A,71,47,85,04,02,03,06,07,01,26,09,07,07,15,07,3C,66,03,0C,00,10,00,80,8C,0A,D0,8A,20,E0,
......................... 2D,10,10,3E,96,00,04,03,00,00,00,18,8C,0A,D0,8A,20,E0,2D,10,10,3E,96,00,10,09,00,00,00,18,8C,0A,
......................... A0,14,51,F0,16,00,26,7C,43,00,04,03,00,00,00,98,8C,0A,A0,14,51,F0,16,00,26,7C,43,00,10,09,00,00,
......................... 00,98,D6,09,80,A0,20,E0,2D,10,10,60,A2,00,04,03,00,00,00,18,00,00,00,00,00,00,00,00,00,00,00,B8

Aaron_B_Intel · ‎11-04-2008

Unfortunately, many TVs (even this year's models) can't run their native resolution over HDMI or DVI. Your machine is advertising the resolutions it can do over HDMI-- and 1360x768 is not among them. It may be technically possible to still do it, I just wouldn't know which timings to advise you to use since the TV doesn't have any like that in its EDID.

So the next best thing is what you are attempting: 1280x720p. When you say using DTDCalc to reduce the overscan "doesn't work"... what exactly happens? The Out of Sync message on the monitor, or ...?

t-roy1015 · ‎11-05-2008

Quoting - Aaron Brezenski (Intel)

Unfortunately, many TVs (even this year's models) can't run their native resolution over HDMI or DVI. Your machine is advertising the resolutions it can do over HDMI-- and 1360x768 is not among them. It may be technically possible to still do it, I just wouldn't know which timings to advise you to use since the TV doesn't have any like that in its EDID.

So the next best thing is what you are attempting: 1280x720p. When you say using DTDCalc to reduce the overscan "doesn't work"... what exactly happens? The Out of Sync message on the monitor, or ...?

I have tried to make make some other resolutions based on others experiences to reduce the amount of screen that I am missing. I have some technical documents provided to me by the manufacturer, but they are not in the same format as some of the standard ones I have seen on the forums here and at AVSFORUM. I will provide the docs given to me.

I would just like a way to reduce the overscan first, or run at the native resolution.

Thanks for helping me.

Aaron_B_Intel · ‎11-06-2008

Yeah, unfortunately the documents they've provided you are not specific on things like sync pulse width and location for 1366, which makes it difficult to generate timings.

So you're left with modifying the image to compensate for what they're doing: they strip off 7% of the image, take the central 1786x1004 pixels, and scale the image to 1366x768.

You should be able to achieve this by using the DTD

01 1D FA 9E 61 F6 3C 10 9B 2C 65 04 00 00 00 00 00 9E

This should result in an image which your monitor thinks is 1920x1080 but which is actually 1786x1004 centered in black space of1920x1080 size. The TV should grab this image and scale it to 1366x768 as it usually does, but since Windows knows it has only 1786x1004 to work with it will place the taskbar and other crucial items in the viewable area.

This is theoretical, unfortunately: some TVs try to be "helpful" and will try to adjust for "excessive" blackspace around the image, and no amount of adjustment will help you because the TV will always try to subtract off the black space and start the image in the upper left hand corner.

If you'd prefer 1280x720, I can try to develop a DTD for that as well.

t-roy1015 · ‎11-08-2008

Thanks, I will try this weekend and reply with the results.

I appreciate the help!!!!

t-roy1015 · ‎11-08-2008

Quoting - t-roy1015

Thanks, I will try this weekend and reply with the results.

I appreciate the help!!!!

I tried the resolution provided and it would not display at all. I wonder if my vbios will not allow the resolution.

Aaron_B_Intel · ‎11-08-2008

Wouldn't display as in it was not an available resolution, or it didn't work when you tried it?

It's doubtfulthe BIOSis refusing 1786x1004 resolution.

t-roy1015 · ‎11-10-2008

Quoting - Aaron Brezenski (Intel)

Wouldn't display as in it was not an available resolution, or it didn't work when you tried it?

It's doubtfulthe BIOSis refusing 1786x1004 resolution.

The new resolution was available, but it would not display.

I was just guessing that the vbios was not allowing as I have heard that some bios don't allow certain resolutions, especially Dell.

Aaron_B_Intel · ‎11-10-2008

Nah, if it's verboten by the VBIOS, it won't even show up on the list.

If it's not displaying, it's undoubtedly a problem with your monitor not liking the timings that were chosen. Could be a bad DTD calculation on my part. Have you tried using DTDCalc to do your adjustments?

t-roy1015 · ‎11-10-2008

Quoting - Aaron Brezenski (Intel)

Nah, if it's verboten by the VBIOS, it won't even show up on the list.

That's good info!

I will try some other settings tonight.

t-roy1015 · ‎11-12-2008

Quoting - t-roy1015

That's good info!

I will try some other settings tonight.

I guess that I'm not going to have luck, maybe my TV will not produce anything else over HDMI other than 720p or 1080i.

No biggie, thanks for the help though.

Aaron_B_Intel · ‎11-12-2008

Some TVs can be like that. Have you tried using DTDCalc, or were you just unsuccessful?

t-roy1015 · ‎11-13-2008

Quoting - Aaron Brezenski (Intel)

Some TVs can be like that. Have you tried using DTDCalc, or were you just unsuccessful?

Yea, I have tried DTDCalc without success. Looks like I will end up purchasing a Popcorn Hour or similar device to stream to my tv.

Once again, thanks for trying to help.